How BridgeDeck's Waterproofing System Works!

BridgeDECK Waterproofing Agent offers a unique solution to the dilemma of how to protect concrete structures from premature deterioration (by providing excellent waterproofing protection, while also increasing the durability and sustainability of the concrete). This paper provides an overview of the proprietary chemical reaction that effectively waterproofs the concrete itself for the design life of the structure.

NOTE: This one-of-a-kind technology was recently voted by the concrete industry as the ‘Most Innovative Product for 2020’ at the World of Concrete Convention held in Las Vegas (category: Materials for Concrete Construction).

Using the spray applied BridgeDECK Waterproofing Agent as part of the BridgeDECK Waterproofing System, provides complete long-term protection for concrete structures (15-year and 30-year labor and materials warranties are available). This involves performing any necessary cleaning, preparation and repair work, followed by the completion of a 3-step waterproofing application process:

  • Step 1: Spray apply BridgeDECK Waterproofing Agent over the entire surface (and allow it to dry to the touch). Then saturate the entire area with water (and let it dry to the touch).

  • Step 2: Spray apply ACR Crack & Void Treatment on any visible cracks, and then spray apply ACR Accelerating Agent over the entire surface (and allow it to dry to the touch).

  • Step 3: Saturate the entire surface area with water once more.

The BridgeDECK Waterproofing System is a modified silicate material that can remain reactive inside the cracks and matrix of concrete for the life of the structure!


When BridgeDECK Waterproofing Agent is applied to concrete, and watered in, it penetrates the concrete and the silcates react with available metallic ions (mainly calcium in hydroxide form). A reaction between Calcium Hydroxide and other ions forms a high-ratio Calcium Silicate Hydrate Gel.


As the concrete dries, a reaction between the Calcium Silicate Hydrate Gel & Carbon Dioxide forms low-ratio gel and Calcium Carbonate as a by-product.


If a crack forms, water will create a reaction between Calcium Hydroxide and the low ratio Calcium Silicate Hydrate Gel to form a high-ratio Calcium Silicate Hydrate Gel which, with assistance of the Calcium Carbonate by-product, seals the crack helping to prevent further water seepage.


The foundation is catalytic reactions of which there are two:

1) The calcium carbonate acts as a consolidating “glue” and “space filler” in cracks, pores and capillaries.

2) Calcium Silicate Hydrate Gel plays a vital role – being flexible allows for small dynamic movement such as shrinkage and thermal movement.

When in contact with water, the gel swells, filling remaining spaces and blocking them from allowing water to pass. The TechCrete Wa terproofing Agent, along with its supporting product-line, is able to produce more mass than when originally applied i.e. it “grows” to seal new cracks that develop after application!

The cycle continues so long as water, calcium or other ions and carbon dioxide are available!

Once the BridgeDECK Waterproofing Agent has been applied and watered in (Step 1), a chemical reaction will begin to occur, that creates a protective waterproofing gel. The chemical reaction that forms this gel occurs ½” – ¾” below the surface of the concrete, and prevents any water, chemicals, chloride ions, etc. from reaching the steel reinforcement bars that were placed in the concrete during construction of the structure. This gel does not form on the surface of the concrete, and does not change the appearance or the slipperiness coefficient of the concrete surface. The concrete surface looks the same after the waterproofing application as it did before the application.


NOTE: Paint, coatings, paving asphalt, etc. can be applied to the surface of the concrete following the completion of the waterproofing system (if desired).


The following components are necessary for this biochemically modified silicate gel to form just below the surface of the concrete, and those components are:

  • TechCrete 2500 Waterproofing Agent
  • Calcium (readily available in the concrete)
  • Water
  • Carbon Dioxide

BridgeDECK Waterproofing Agent penetrates below the surface of the concrete during the initial application, and remains reactive inside the matrix of the concrete indefinitely. As future cracks occur, rainwater will reactivate the chemicals, forming new gel and sealing the cracks as they occur. Stable cracks up to 2.0 mm in width will be sealed during the application of the waterproofing, and future cracks up to 0.4 mm in width will be sealed for the remaining life of the structure. Any stable cracks that are wider than these dimensions, and any structural or moving cracks must be properly repaired as outlined in the Alchemco repair procedures.

BridgeDECK Waterproofing Agent has a unique and proprietary, biochemically modified catalyst that separates it from all other spray applied concrete sealers and waterproofing products. A catalyst is a material that enables, speeds up or slows down a chemical reaction, without changing the chemical reaction itself. When BridgeDECK Waterproofing Agent is used to waterproof a concrete structure, there are two distinct catalytic reactions that occur, creating a ‘virtuous cycle’ that continually repeats itself over and over for the remaining life of the structure.

BridgeDECK Waterproofing Agent is primarily made up of silicates, combined with this proprietary biochemical catalyst. During the three application steps, the silicates within BridgeDECK Waterproofing Agent react with metallic ions in the concrete (primarily the calcium hydroxide that is a by-product of cement hydration). During this stage, BridgeDECK Waterproofing Agent is highly reactive, and creates a complex Calcium Silicate Hydrate (CSH) gel. This gel swells when it comes in contact with water (blocking cracks, pores, capillaries, voids, etc.) reducing the permeability of the concrete and preventing the penetration of water.

Over time, Carbon Dioxide from the atmosphere extracts some of the Calcium from the CSH gel to form Calcium Carbonate. This creates an inert mass that further reduces the permeability and porosity of the concrete, by permanently blocking the cracks, voids, micro-fractures, etc. However, the ‘carbonation of concrete’ problem that is usually associated with Carbon Dioxide, is not a problem for BridgeDECK.

THE LIFETIME CYCLE: In order for Bridgedeck Waterproofing Agent to seal all future cracks that form after the application, it must produce more mass than was originally applied … in other words it must ‘grow’. When Carbon Dioxide in the atmosphere extracts some of the Calcium from the waterproofing gel, it leaves a ‘low ratio’ CSH gel. As a result of this interaction, the waterproofing gel is now ‘ready to react’ again, and actively looks to attract Calcium ions to bring it back into equilibrium. So, when water enters the concrete, the cement continues to hydrate, and through the process of diffusion within the concrete, the Calcium moves from areas of high concentration to areas of low concentration. The ‘low ratio’ CSH gel then reacts with the newly available Calcium and once again becomes a ‘high ratio’ CSH gel. At this point, the cycle begins all over again with the ‘high ratio’ CSH gel reacting with Carbon Dioxide in the atmosphere, once again forming Calcium Carbonate, which permanently plugs the cracks, pores, microfractures, voids, etc. (once again leaving a ‘low ratio’ CSH gel).

This ongoing chemical reaction creates a dynamic and reliable self-healing process within the concrete. The process of ‘carbonation’ is normally considered detrimental to concrete, because it lowers the pH level of the concrete (which deteriorates the protective ‘passive layer’ surrounding the steel reinforcement bars, and allows corrosion to occur). BridgeDECK Waterproofing Agent Waterproofing Agent does not have this problem. It creates a ‘virtuous’ carbonation cycle which does not lower the alkalinity level of the concrete, but in fact increases the alkalinity level, thereby enhancing the protection of the steel reinforcement. In addition, the Calcium Carbonate that is formed during this carbonation cycle increases the long-term durability of the concrete.

The difference between BridgeDECK Waterproofing Agent and normal silicate products is that the biochemical catalyst allows this carbonation cycle to repeat itself indefinitely. Plain silicates get stuck when they go thru the carbonation process, and are not available later to react again. As a result, normal silicate products are not even able to seal ‘existing cracks’, much less any ‘future cracks’ that will occur.

Also, the fact that there are two reaction components that occur when using BridgeDECK Waterproofing Agent is important. The Calcium Carbonate that is formed acts as a consolidating glue or space filler, in the cracks, pores, capillaries, etc. The CSH gel also plays a vital role, because not only does it allow the virtuous cycle to occur over and over (a Calcium Carbonate factory), but this colloidal gel is not rigid like crystalline technology products are; so it allows for small dynamic movement such as shrinkage or thermal movements in the concrete.

In summary, when BridgeDECK Waterproofing Agent comes in contact with water it forms a waterproofing gel that swells; filling and blocking off the spaces (cracks) that allowed the water to enter. Then the ‘factory’ gets to work depositing Calcium Carbonate to permanently seal it.The waterproofing gel will then remain ‘dormant’ until water comes in contact with it again.

FAQ - Also known as bridgedeck 101

1. Is it important to do all of the ‘waterings’ in a timely manner?

After the application of BridgeDECK Waterproofing Agent becomes dry to the touch, the first watering is absolutely CRITICAL!
If the product is not watered within 6 hours of being applied, the system is lost and the BridgeDeck Waterproofing Agent material is no more useful than a floor hardener. The following days’ waterings (Step 2 watering or Accelerating Agent…and Step 3 watering) can be conducted at any time. The fact is it will usually take watering every day for 3 days (or using Accelerating Agent the second day) to promote sufficient modified silicate gel growth in cracks to achieve a 100% watertight result. Once BridgeDECK Waterproofing Agent is touch dry, it is not possible to water it too much. In fact, you could dam the area and allow the cracks to leak water until they totally seal over the next 2-3 days.

2. In addition to providing a low-cost application, what other benefits does BridgeDeck provide?

The benefits of using BridgeDECK Waterproofing Agent are varied & significant.
Low cost application – BridgeDECK Waterproofing Agent can be applied very quickly & efficiently compared to most other waterproofing products.
Fast Track Construction – Often in wet weather conditions, the need to have all moisture removed from the concrete prior to applying a  waterproof coating or membrane on the surface, can add significant  time delays.  By comparison BridgeDECK Waterproofing Agent can be applied as soon as concrete surface is visually dry.
No Damage – Once BridgeDECK Waterproofing Agent is applied and dries sufficiently (maximum 6 hours), it cannot be damaged by the other trades working on site.
Construction & Engineering Savings – For example BridgeDECK Waterproofing Agent applications on parking structures, is applied directly onto the structural slab. This avoids the need for a structural topping slab, which saves time & money. The same is true for bridges where a topping slab is not required over the BridgeDECK Waterproofing Agent, since ballast stones can be placed directly over the waterproofing product.

3. Can BridgeDeck Waterproofing Agent be applied over an area where a crystalline growth waterproofing product was previously used?

Yes, quite often crystal admixtures which have been inappropriately applied above grade (shaker method) continue to form cracks which are not sealed…and continue to leak.
BridgeDECK Waterproofing Agent can permanently repair such failed applications…
due to the superior crack sealing properties of its modified silicate gel.

4. Can BridgeDeck Waterproofing Agent damage building materials?

Since BridgeDECK Waterproofing Agent has a high pH level (11.7) similar to concrete itself… contact with aluminum, glass, and glass glazed tiles should be avoided.
NOTE: It is very IMPORTANT to make sure any overspray does not come in contact with such materials…this of course also includes car paintwork.

5. How deep does BridgeDeck Waterproofing Agent penetrate into the concrete?

BridgeDECK Waterproofing Agent has shown 1/2-inch to 2/3-inch average penetration below the surface, when used on highway grade concretes (5,800 psi).  Additional testing has shown an average 3/4 inch penetration when applied to 4,600 psi concrete. 

6. Is BridgeDeck Waterproofing Agent suitable to waterproof all types of concrete?

BridgeDECK Waterproofing Agent will provide excellent waterproofing properties in most cementitious concrete mixes. Suitable concretes types include OPC, PPC Ash free blends, Type C ash blends and slag blends. Concrete mixes containing silica fume should be limited to 8% cement replacement.

7. Does BridgeDeck Waterproofing Agent increase the durability of the concrete?

BridgeDECK Waterproofing Agent is an excellent long-term waterproofing solution, that extends the useful life of the  concrete structures considerably. Areas treated with BridgeDECK Waterproofing Agent will prevent concrete from spalling, and defend against the effects of freeze/thaw and de-icing salt damage. Testing demonstrates that applied areas experience an increase in hardness from 6 to 8 on Moh’s scale (a hardness rating of 8 is equivalent to granite). 

8. What happens if it rains during the application of the BridgeDeck Waterproofing Agent?

It is CRITICAL that BridgeDECK Waterproofing Agent gets absorbed into the concrete through capillary action, which is possible when the concrete surface becoming dry to the touch before watering.

NOTE:  Should rain fall on BridgeDECK Waterproofing Agent before it dries to the touch…it must be assumed  that another application will be required once the concrete has become dry once again.

9. Is BridgeDeck Waterproofing Agent environmentally friendly?

BridgeDECK Waterproofing Agent is one of the most environmentally safe waterproofing technologies available in the marketplace. BridgeDECK Waterproofing Agent is certified as acceptable for use in potable water tanks and additionally has been utilized in marine aquarium projects (using salt water).
NOTE: product has international potable water certifications, and is NSF-62 certified.

10. What happens if the product is not ‘watered in’ to specification?

When BridgeDECK Waterproofing Agent is applied and becomes touch dry (2-6 hours) a first watering is absolutely critical for BridgeDECK Waterproofing Agent to function properly. The second and third specified waterings are to allow sufficient product expansion inside the concrete to seal both the matrix and any cracks present at the time of application..

11. Is BridgeDeck Waterproofing Agent ‘UV Stable’?

Yes. Since BridgeDECK Waterproofing Agent forms its waterproofing gel below the surface of the concrete…it is not affected by UV radiation.

12. What effects do high & low temperatures have on BridgeDeck Waterproofing Agent’s waterproofing performance…and re-sealing capabilities?

BridgeDECK Waterproofing Agent must be applied above 40°F to ensure there is no moisture frozen inside the concrete that is being treated. Furthermore, BridgeDECK Waterproofing Agent can only react with free calcium and water to create its chemical seal when the temperature is 40°F or above. BridgeDECK Waterproofing Agent should not be applied at temperatures above 95°F as the product will begin to atomize into the atmosphere, and could begin to dry on the concrete surface prior to capillary absorption.

Once BridgeDECK Waterproofing Agent has been properly applied…and dries to the touch, temperature becomes irrelevant. This makes the product suitable for use in sub-zero temperatures or high-heat conditions. The waterproofing formula has been proven over the course of many projects that were completed in areas of intense heat and freezing temperatures.

13. How soon can BridgeDeck Waterproofing Agent be applied to newly poured concrete?

We recommend allowing any newly poured concrete to cure for a minimum of 28-days prior to BridgeDECK Waterproofing Agent being applied.
However, BridgeDECK Waterproofing Agent can be applied in as few as 14 days after the new concrete is poured, UNDER CERTAIN FAVORABLE WEATHER CONDITIONS. Contact the Alchemco Technical Department to discuss the necessary weather conditions for this to occur, on a project-by-project basis.
If the 28-day period is reduced in any way, the applicator must be prepared to re-visit the project after 28 days from the pour date, to ensure that no new major cracks have formed which may require repair and/or re-application of BridgeDECK Waterproofing Agent.

14. How does BridgeDeck Waterproofing Agent prevent salts and other contami-nants from reaching the steel reinforcements?

BridgeDECK Waterproofing Agent uses water to waterproof in a similar manner to the way Volclay
(volcanic bentonite clay) reacts. Only instead of being on the surface, BridgeDECK Waterproofing Agent is creating its waterproofing barrier below the concrete surface.

Given that tests confirm a 1/2 inch to 2/3 inch product penetration in 5,800 psi concrete, any water or salts that penetrates the first 1/10 inch is of no concern to the structure’s durability (since steel reinforcements are generally designed to be at least
1 inch below the concrete surface).

15. Does BridgeDeck Waterproofing Agent treatment help prevent accelerated corrosion or other damage to steel reinforcements?

Cementitious concretes are highly alkali in nature (which is what delivers passivity to the steel), preventing it from rusting. The high pH of BridgeDECK Waterproofing Agent functions in exactly the same protective way. In fact, the combined application of BridgeDECK Waterproofing Agent and ACR Accelerating Agent actually improves the alkalinity of ‘alkali depleted’ concrete structures.

16. Does BridgeDeck Waterproofing Agent trap moisture in the concrete?

NO.  BridgeDeck Waterproofing Agent allows for moisture vapor outgassing while preventing both the ingress of water molecules and pollutants from reaching any steel reinforcement.  


17. If it has been raining how do I know the concrete is dry enough to treat?

Providing the surface is dry to the touch, BridgeDeck Waterproofing Agent may be applied. If BridgeDeck Waterproofing Agent is applied to wet concrete or concrete with damp spots, the product will not be absorbed into the concrete thru capillary action.
This means that any damp spots treated with BridgeDeck Waterproofing Agent would simply see the product “not absorb” into the concrete, and it will wash away during the first watering procedure.

18. Can coatings and/or paints be applied in areas treated by BridgeDeck Waterproofing Agent?

YES! The effective chemicals that make up BridgeDeck Waterproofing Agent migrate into the concrete, and form a sub-surface waterproof gel there. As a result, the surface can be coated or painted once the full waterproofing application has been completed.
However, it is important to understand that BridgeDeck Waterproofing Agent’s is a water activated product, whose ‘self-healing’ properties (to seal future cracks) are dependent on water seeping into the concrete when a new crack occurs. This interaction of water, the calcium hydroxide present in the concrete, and BridgeDeck Waterproofing Agent is what forms additional gel to seal new cracks. In areas where paint or a surface coating has been applied (in addition to our waterproo ing materials) that inhibits the penetration of future water into the concrete…our product’s ‘self-healing’ process cannot take place.

19. What happens if the concrete cracks after achieving a watertight treatment applying BridgeDeck Waterproofing Agent?

Rainwater itself will activate the ‘self-healing’ properties of the product to
take place within a couple of days, so no remedial repairs should be
required. BridgeDeck Waterproofing Agent is re-active in concrete, and
will repair any future cracks up to a width of 1/64 inch (0.4 mm).

20. Can BridgeDeck Waterproofing Agent be applied on projects where other waterproofing ‘sealer’ materials have been used previously?

Any material designed to repel water from concrete will also repel BridgeDeck Waterproofing Agent
(stopping it from migrating into the concrete), and thereby preventing the waterproofing reaction from taking place.
In order to use BridgeDeck Waterproofing Agent on these projects, all previous failed waterproofing materials (coatings, membranes, etc.) must be completely removed prior to application. If cracks have been contaminated by previous materials, they may require an arrow head grind to make sure all of the previously applied waterproofing sealer has been removed. ACR Patch & Repair (to repair cracks too large for the gel to bridge) and BridgeDeck Waterproofing Agent can then be used.

20. Can BridgeDeck Waterproofing Agent be applied on projects where other waterproofing ‘sealer’ materials have been used previously?

Any material designed to repel water from concrete will also repel BridgeDeck Waterproofing Agent (stopping it from migrating into the concrete), and thereby preventing the waterproofing reaction from taking place.
In order to use BridgeDeck Waterproofing Agent on these projects, all previous failed waterproofing materials (coatings, membranes, etc.) must be completely removed prior to application. If cracks have been contaminated by previous materials, they may require an arrow head grind to make sure all of the previously applied waterproofing sealer has been removed. ACR Patch & Repair (to repair cracks too large for the gel to bridge) and BridgeDeck Waterproofing Agent can then be used.

21. Is BridgeDeck Waterproofing Agent compatible with other waterproofing products used during the installation of expansion joints, or the detailing of penetrations, etc.?

As BridgeDeck Waterproofing Agent produces Calcium Silicate Hydrate gel, all concrete products will adhere to BridgeDeck Waterproofing Agent treated concrete.

22. Does BridgeDeck Waterproofing Agent attract dirt or air borne pollutants onto treated concrete?

BridgeDeck Waterproofing Agent as a silicate material, creates no electrostatic attraction for  airborne pollutants. The opposite can apply to sealer materials in particular siliconate based materials.

23. How well does BridgeDeck Waterproofing Agent prevent foreign materials such as fuel, oils and grease from penetrating into the concrete…and do these materials adversely affect the BridgeDeck Waterproofing Agent’s performance?

These materials are unable to penetrate into concrete that has had a proper application of BridgeDeck Waterproofing Agent.
Furthermore, these materials cannot adversely affect the BridgeDeck Waterproofing Agent’s performance.

24. How does BridgeDeck Waterproofing Agent compare to other waterproofing sealer materials such as Silanes, Siloxanes and Methyl Methacrylates?

Generic sealers such as Silanes, Siloxanes, Methyl Methacrylate’s (and even Silicates) can only deliver general & temporary concrete protection, without addressing the issue of ongoing concrete cracks.
Sealers are most often used as a general preventative for freeze/thaw damage, ingress of airborne pollutants and some protection from de-icing salts.
A 2-coat, 100% solids Silane waterproofing product will have a substantially higher installed cost than a single application of BridgeDeck Waterproofing Agent.

25. Are there areas where you should not apply BridgeDeck Waterproofing Agent?

BridgeDeck Waterproofing Agent requires capillary suction into dry concrete prior to the application of the first t ‘watering in’ procedure. Therefore BridgeDeck Waterproofing Agent cannot be applied to wet concrete, whether it’s simply damp or has water permeating through it.
BridgeDeck Waterproofing Agent should not be applied to any concrete sur-faces where the general matrix and/or cracks present have been contaminated with any water repellent materials (they must be removed prior to application of our product). Obviously if water cannot absorb into the concrete, then neither can BridgeDeck Waterproofing Agent.

26. Will BridgeDeck Waterproofing Agent change the appearance of concrete either immediately after the application, or in the long term?

When BridgeDeck Waterproofing Agent has been applied to concrete, watered and allowed to dry, a trained eye will notice a slight increase in sheen given off by excess surface silicates.
Over the long term there will be no visual changes what so ever including any form of discoloration.

27. Is BridgeDeck Waterproofing Agent similar to a ‘crystal growth’ waterproofing product?

BridgeDeck Waterproofing Agent is often compared to crystal growth materials however, they have totally different chemistries & technologies.
Crystal growth materials produce rigid dendritic crystals to block water molecules.
By comparison BridgeDeck Waterproofing Agent forms an amorphous gel below the surface of the concrete…including any cracks the are the time of application.
The amorphous gel can be cyclically opened & closed in watertight cracks of up to 5/64 inch
(2.0 mm) wide…and will tolerate a 1/64 inch (0.4 mm) opening & closing cycle on future cracks going forward – without leakage through the slab.

28. What type of spray equipment is required to apply BridgeDeck Waterproofing Agent onto concrete?

Small applications can be undertaken with the use of a simple backpack sprayer (manual or electric) delivering up to 3,000 sq.ft. per hour. For larger projects an impeller driven on demand pump hooked up to deliver 15,000 sq.ft. per hour per unit.

29. What level of water pressure will BridgeDeck Waterproofing Agent handle prior to failure?

Concrete treated with BridgeDeck Waterproofing Agent has been successfully tested to a pressure of 1.300 feet (400 meters).
BridgeDeck Waterproofing Agent has successfully been used on projects involving ponds, pools, water parks, and other similar projects where the concrete is under constant water pressure. It has even been used to waterproof a concrete ‘floating dry dock’ in Hawaii…where the treated portions of the dry dock have been continuously submerged in salt water (24/7) for years, with no leaks.

30. Can you use BridgeDeck Waterproofing Agent on an existing topping slab which leaks?

BridgeDeck Waterproofing Agent waterproofs all cementitious concretes, including reinforced topping slabs. While BridgeDeck Waterproofing Agent will waterproof the actual topping, all too often water paths can remain under the topping transmitted by failed penetration detailing, wind driven rain  external to the building, electrical conduits, parapet wall deck interfaces from the outer edge etc. etc. Only treat topping slabs at your own risk, fully understanding the intrinsic problems which may be encountered post BridgeDeck Waterproofing Agent application due to other unknown problems existing under the topping. 

31. What happens when BridgeDeck Waterproofing Agent is used to treat concrete with unstable working cracks (due to structural volatility)?

In many cases, these projects are ‘under engineered’ parking structures, where vehicular loading is contributing to structural movement. For these applications BridgeDeck Waterproofing Agent is the primary concrete waterproofing material and volatile cracks are addressed by utilizing ACR PolySeal Sealant in the volatile cracks to accommodate movement without failure.

32. What special steps should be taken on projects with old/weathered concrete slabs that have leaked for many years?

Alchemco recommends applying ACR Accelerating Agent (average rate of 200 sq.ft. per gallon) over the entire surface. When used in combination with BridgeDeck Waterproofing Agent, this will insure the proper generation of the sub-surface waterproofing layer.

33. How do you know that sufficient product is being applied during spraying?

The average application rate is 200 sq.ft. per gallon…and in many cases, the applicators will section off portions of the area to be treated, using 5-gallon pails of product spaced every 1,000 square feet.
During the course of a BridgeDeck Waterproofing Agent application, the applicator should see product flowing on the surface of the concrete. Simply misting the surface without saturation is deemed ineffective.

34. Can BridgeDeck Waterproofing Agent waterproof cold or pour joints without using Waterstop or other detailing work?

Yes, however for Existing Structure projects, Alchemco strongly recommends the applicator does not rely solely on the BridgeDeck Waterproofing Agent in these areas. Please see in the BridgeDeck Installation Details, where it refers to the use of ACR PolyMembrane Flashing for these types of cases.
For New Construction projects, Alchemco strongly recommends the use of TechCrete Waterstop Strip (and Adhesive) on cold joints or pour joints (when the concrete is being poured).

35. What happens if a previously leaking crack continues to leak after a BridgeDeck Waterproofing Agent has been applied?

One of great features of BridgeDeck Waterproofing Agent is that if a
leak is still present at the end of an application, the matter can be easily
Unlike a membrane application where water can track underneath the
membrane (and show up somewhere else), with a BridgeDeck Water-
proofing Agent application one can go straight to the offending crack for
remedial treatment.
In some instances, just the addition of more water (promoting more gel growth) will alleviate the situation.
In other cases, the problem may require applying tape to the underside of the concrete slab, so that BridgeDeck Waterproofing Agent can be flooded into the crack, then further watered to achieve a 100% watertight result.

36. What effect, if any does BridgeDeck Waterproofing Agent have on the bonding ability of cementitious materials?

The BridgeDeck Waterproofing Agent bond wrench test shows a 27% plus bond increase between cementitious materials.

37. What is the shelf life of BridgeDeck Waterproofing Agent?

As long as the lid on the container remains sealed (preventing air intrusion) BridgeDeck Waterproof-ing Agent maintains a virtually unlimited shelf life. However, the product should always be mixed prior to application…since the solids can settle to the bottom of the container over time.

38. Does BridgeDeck Waterproofing Agent promote fungal growth (mold) on treated concrete?

Since BridgeDeck Waterproofing Agent is a high pH product (11.7) it will prevent or deter fungal growth occurrence. In damp shaded areas where fungus will eventually grow on BridgeDeck Waterproofing Agent removal of the fungus is extremely easy, since the spores are unable to penetrate into the concrete.

39. If BridgeDeck Waterproofing Agent becomes frozen in its container, does this destroy the performance ability of the product?

If BridgeDeck Waterproofing Agent becomes frozen in its container, it is essential that the product is
“slowly” warmed to around 40 degrees Fahrenheit.
The product should then be stirred thoroughly…before using it for application.
Also, be aware that the warmer the temperature of the concrete, the faster the BridgeDeck Waterproofing Agent will react with any free calcium in the concrete.

40. Does BridgeDeck Waterproofing Agent accelerate the negative effects of AAR (Alkali Aggregate Reaction) or ASR (Alkali Silica Reaction)?

Most Silicate based sealers, being highly alkali in nature increase the rate of AAR/ASR concrete deterioration. However, BridgeDeck Waterproofing Agent stops AAR/ASR concrete expansion totally…by stopping water’s entry into the concrete slab, that’s critical to this ongoing reaction.

41. What happens if hot asphalt is applied over concrete surfaces that have been treated with BridgeDeck Waterproofing Agent?

Hot asphalt (320°F) applied over a concrete slab that has been treated with BridgeDeck Waterproofing Agent will have no detrimental effect.
The asphaltic bond test shows no bond loss when placed over the control and BridgeDeck Waterproofing Agent treated samples. Of course,
it is critical that proper asphalt application procedures are followed, in particular the placement of the “tack coat” prior to asphalt placement.