HOW DOES DRYCRETE WORK?
DRYCRETE Moisture Stop goes into concrete as a unique precision-blended colloidal liquid. It’s internally generated compound or precipitate, is designed to be superior when compared to other colloidal silica compounds. The precipitate packing density is acutely precise and creates pore networks of exact uniform-sized porosity with pore sizes smaller than free moisture.
As DRYCRETE precipitate is being formed, it involves special ingredients to cause polymer cross linking and branching, encouraging polymer particle and strand connection. It creates very strong polymer chains, which provide the extra strength and durability to truly become permanent and insoluble. Furthermore, the polymer position chain and pore configuration cause DRYCRETE gel compound’s residual water or free moisture to remain in a stretched position with a density similar to that of ice. Under hard freeze conditions, this water or moisture does not expand further to cause freeze-thaw cycle damage, as does the gel compounds of other colloidal silica products.
Colloidal silica and silicate products, making similar claims, usually only form shallow, weakly linked short chain gel polymer compounds. They may or may not hold up for an appreciable length of time. They are entirely dependent on the harshness of the concrete installation’s surrounding environment. Plus, there is always the possibility that incomplete gel may migrate back to the surface, creating surface traction problems.
Additionally, DRYCRETE’s low viscosity, allows for greater penetration within the concrete matrix and continued reaction deep within a concrete mass due to its minute particle size. Because of its proprietary composition and unique capabilities, DRYCRETE does not saturate and solidify at the surface as in standard silicate based products, and therefore leaves no surface residual to impede or hinder bonding of any coatings or adhesives.
Permanent Integral Moisture Barrier
- Permanent moisture control over the lifetime of the concrete substrate.
- Does not alter surface tension or profile.
- Does not interfere with adhesion of adhesives, coatings or sealers.
- Deep, internal penetration within the capillary voids of the concrete matrix.
- Alkali chemical bonding and reactivity.
- Infinite particle size and polymer chains result in excellent depth and strength of resulting gel barrier.
- Unique formulation of a composite, engineered hydro-silicate in a colloidal base.
- Excellent resistance to acid deterioration.
- Significant resistance to organic and synthetic oils, including motor oil and hydraulic fluid.
- Field proven performance for over 20 years.
HOW DOES DRYCRETE AFFECT BONDING OF ADHESIVES & COATINGS?
HOW CAN DRYCRETE BECOME A PERMANENT SOLUTION OVER THE LIFE OF THE CONCRETE?
In its simplest description – DRYCRETE Moisture Stop becomes “concrete within concrete”.
The increased hydration of the free alkali or un-hydrated cement reduces the internal permeability of the concrete mass. The greater than 90% average permeability reduction results in the stoppage of internal moisture migration to the surface matrix. Existing internal moisture content within the capillary voids at the time of application, acts as a conduit, which facilitates DRYCRETE Moisture Stop to reach greater depth, using the existing internal paths of reticulation.
After 24 hours of application, the precipitate turns into a 100% solids gel mass, effectively obstructing moisture migration from the underside of the concrete mass. Additionally, the increased densification of the concrete arrests dusting, and in the process purges and stops efflorescence. Moisture is contained to the surface of the slab, and can only be added from topical intrusion, such as flooding.
IS THERE A WARRANTY AVAILABLE WITH DRYCRETE MOISTURE STOP?
Yes, a “Life of the Concrete” warranty is available, with DRYCRETE Moisture Stop PLUS. The warranty requires a Certified Installer or supervised installation by an authorized representative.
Permanent Moisture vapor emission control
Architects & Specifiers
- Permits accelerated construction schedules for flooring installations
- One time permanent treatment with blanket warranty program*
- Zero VOC Environmentally friendly product
- Green sustainability and LEED qualifications
- Avoid costly change orders & delays
- Per ASTM standard, there is no required RH moisture test after application
- Helps to control job costs and change orders due to moisture concerns
- No changes in standard application guidelines for coatings of flooring materials
- 100% safety net to the GC and client with 60-70% cost reduction over similar warrantied systems*.
- Certified installer program.
Water penetrates the concrete and migrates through the concrete via capillary voids, similar to how blood flows through capillaries in your body.
When the temperature drops low enough for the water in the concrete to freeze, the water expands and causes damage to the concrete surface, otherwise know as spalling.
How DRYCRETE™ protects concrete:
DryCrete penetrates the concrete four to six inches utilizing the capillary structure, reacting with unhydrated cement. This reaction causes a colloidal gel to form inside the capillary structure, sealing the concrete from the inside out. This gel resists any water or chloride penetration, providing unsurpassed permanent protection.
Efflorescence is created by water-soluble salts which are found in ground water. Water migration (vapor emission), carries the ground water and salts to the surface though capillary channels to migrate to the surface, a process called capillarity.
Any porous, cement based, building material in direct contact with the earth is a potential source for efflorescence. Eliminating the ability of moisture to travel through capillary channels stops efflorescence.
DRYCRETE Moisture Stop creates an integral hydrostatic barrier through alkali reaction, forming a hardened, water insoluble gel, and filling the capillary voids and paths of reticulation, thereby creating a permanent integral moisture barrier.
Efflorescence and moisture seepage have many variables, such as large fissures or stress cracks, and these variables need to be remedied prior to the application of DRYCRETE Moisture Stop.
Whitening of Concrete Sealers – also known as ”Blushing”
This is a frustrating and growing problem in the architectural concrete Industry. There are many reasons why this happens and Drycrete Moisture Stop offers a tangible solution pertaining to whitening of topical sealers, also known as blushing.
Blushing of topically applied sealers is directly associated with applying sealers over moisture laden, freshly placed concrete. Sealing within a couple of days from placement and finishing can almost guarantee that you will have problems. The same is true of any topical coatings, as no one applies such coatings over wet surfaces.
Application related failures include:
- Sealing the concrete within 1-3 days of placement.
- Sealing concrete after pressure washing on the same day.
- Efflorescence created under the topical sealer from moisture vapor emissions due to the lack of vapor barriers and/or insufficient aggregate base.
- Applying to many thick coats of sealer, in fact created an unbreathable barrier.
- Too many coats and/or incompatible sealers
- Sealing too frequently with excessive buildup can also entrap moisture, as the topical sealer becomes far less breathable and unable to dissipate a controlled rate of evaporation.
Environmental related failures include:
- The installation of new sod and sprinklers at the perimeter of a given concrete slab.
- Improper drainage and runoff, resulting in stagnant water puddles and excessive ground moisture.
- High water table, resulting in excessive ground water evaporation through the concrete slab.
Trapped moisture shows up as a whitish discoloration as water is trapped between the surface of the concrete and the topical sealer. The head from the daily sun causes accelerated evaporation and the moisture is trapped. Concrete needs to breathe, and a topical concrete sealer must be “breathable”. Allowing ground water and surface water to freely evaporate or to be stopped integrally by making the entire concrete mass a vapor barrier is the solution to blushing.
How do you fix this, after discovering the problem?
- Strip the existing sealer: This is both labor intensive and requires controlled cleanup.The resulting costs are often a sore point, and if you re-apply the sealer without fixing the cause, there is a good chance that blushing will re-occur.
- Wet sandblasting – This is fast and cost effective due to a simple cleanup. However, it requires high psi pressure washers with a special wand attachment to induce sand into the water at a controlled rate for topical sealer removal without damaging the concrete surface. CAUTION: This needs to be done by a wet sandblasting professional that has ample experience in the use and application of this removal process. The re-application of the sealer needs to be done in very thin coats, to avoid repeating the problem of future blushing – but again, without fixing the root of the problem, this can re-occur.
- Specially blended slow dissipating solvent blends are also used to re-emulsify the sealer, and release trapped moisture underneath to remove the blushing.
The problem with the solutions above, is that they do not address the core problem of blushing – excess moisture within the concrete.
DRYCRETE treats the concrete from within, resulting in a decrease in permeability of >90%, thereby controlling the rate of evaporation to a much lower level, and therefore controllable to remain within the limitations of the breathability of the topical sealer, even if over applied.
It is best to apply DRYCRETE at the time of placement, as a curing compound. On decorative stamped concrete, it is best to apply after the antiquing agent has been properly washed off, and all water puddles have dissipated. DRYCRETE can be applied to moist/wet concrete, as long as there is no standing water puddles – which in facts aids the penetration and reactivity of DRYCRETE deep within the concrete matrix.