Proper mixing and installation is critical to the optimal success of all product.  See Installation Tips, Techdata, & MSDS for more details on our products.  Be sure to contact us with any questions and/or concerns that you have.

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A Division of Epoxy Systems, Inc
Over 375 products,
Since 1980
Florida & Vermont

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6AM-1PM Pacific Time).

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This information is presented in good faith to assist in determining whether this product is suitable for application. No warranty or representation, however, is intended or made, nor is protection from any law or patent to be inferred, and all patent rights reserved. a division of Epoxy Systems, Inc.  warrants its products (when properly stored) for the period of time as follows: Epoxies, Product #315, Product #315BC, and Product #316 one (1) year; Polyesters, Methyl Methacrylates (normal) two (2) months and Polyurethanes Four (4) months;  Power Tools and Equipment 90 days; Vinyl Esters, High Molecular Weight  Methacrylates (HMMA) and all other resins (not specifically mentioned above) 30 days; hand tools (non-power tools) 30 days. warrants that its products will be free of manufacturing defects and will be in conformity with published specifications when handled, stored, mixed and applied in accordance with recommendations of If any product fails to meet this warranty, the liability of will be limited to replacement of any non-conforming material if notice of such non-conformity is given to within the warranty period for the material (as indicated above), or within 1 year of the delivery of materials (whichever is sooner). may in its discretion refund the price received by in lieu of replacing the material. No customer, distributor, or representative of is authorized to change or modify the published specifications of this warranty in any way. No one is authorized to make oral warranties on behalf of In order to obtain replacement or refund the customer must provide written notice containing full details of the non-conformity. reserves the right to inspect the non-conforming material prior to replacement. EXCEPT FOR THE EXPRESSED WARRANTY STATED ABOVE, THERE ARE NO OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR PURPOSE.'s OBLIGATION SHALL NOT EXTEND BEYOND THE OBLIGATIONS EXPRESSLY UNDERTAKEN ABOVE AND SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO THE PURCHASER OR ANY THIRD PARTY FOR ANY LOSS, COST, EXPENSE, DAMAGE OR LIABILITY, WHETHER DIRECT OR INDIRECT, OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. All quotes and sales subject to availability.

Many of our products are made on an individual order basis.   Unless authorized in writing by a division of Epoxy Systems, Inc. in writing before the material is made, there are no returns on items purchased from us, once the order has been processed, and the material made. In the event of authorized returns a restocking charge will be charged in the amount of 30% of the value of the material returned or $150 whichever is greater.  No returns on non-list priced items.  All Returns are for merchandise (store) credit only, no cash or credit card credits.  In the event of a return, buyer is responsible for the cost of shipping and handling in both directions.


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40% Solid Silane With Corrosion Inhibitors

Description: #42 is a 40% silane solvent-based concrete sealer, containing time-proven Migrating Corrosion inhibitors. EPOXY.COM #42 is a small molecule product, which allows deep penetration into concrete and provides water repellency by chemically reacting with the cementitious substrate under proper application. Treated substrates are hydrophobic and retain their original appearance. EPOXY.COM #42 seals surface pores while preventing intrusion of chloride and carbonation and protects from the ingress of wind-driven rain. Treated concrete surfaces are fully breathable and their natural moisture-vapor transmission is not affected.

An alkaline environment, such as new concrete, will catalyze the reaction and speed the formation of EPOXY.COM #42s hydrophobic surface. EPOXY.COM #42s unique future is its Migratory Corrosion Inhibitor action that allows this product to migrate through even the densest concrete structures. It seeks out embedded steel reinforcing bars to form a protective monomolecular corrosion inhibiting coating. EPOXY.COM #42 also protects a multitude of metals, including carbon steel, galvanized steel and aluminum. EPOXY.COM #42 will extend the service life of structures.


Typical Uses:


Surfaces to receive EPOXY.COM #42 must be clean, sound and free from all dirt, oil, grease, chemical films and coatings, and other contaminants prior to application. While some moisture present in the concrete or masonry will not affect the performance of EPOXY.COM #42, the drier the surface, the deeper the penetration. The maximum moisture concrete shall not exceed 5%. Use water blast, sandblast, or shot blast as necessary to achieve the desired surface condition. Application can be performed using airless sprayer, roller or brush. When a brush or roller is used, repeated applications should be made until the surface remains moist for a few minutes. If and airless is used, application should continue until the substrate is thoroughly saturated. Sprayers should be fitted with solvent resistant hoses and gaskets.

For Best Performance: Do not dilute, Do not apply during inclement weather or when inclement weather is anticipated within 6 hours. To prevent damage to nearby shrubbery and landscaping, cover or protect with drop cloth.

Apply at maximum 200 square feet/gallon to achieve results of NCHRP Report # 244. Two (2) applications give better performance than one; a second (2nd) coat may be applied immediately after first (1st) coat is fully absorbed. For precise coverage rates a field trial or mockup should be performed.

Drying Time: Typical drying time for EPOXY.COM #42 is 2 hours at 70 F (21 C) and 50% relative humidity. Cooler temperatures or higher relative humidity shall extend the drying time


200 square feet per gallon two (2) coats required.

Typical Properties:

Appearance Clear yellow liquid

pH 9.5-10.5 (1% aqueous)

Density 6.7-6.8 lb/gal (0.8-0.82 kg/l)

Solvent Isopropanol

Technical Data From Laboratory Tests

Modified NCHRP 244 Series II Testing on concrete (2-inch cubes, 21 day immersion in 15% NaCl, 5,000 psi concrete)showed a 74% reduction in weight gain with an average penetration of inches.


Weight Gain During Saltwater Soak

Low weight gains with the lowest absorption exhibited after 5 days of air curing (>80 percent water exclusion).


Water Vapor Transmission

Water vapor transmission of coated samples is excellent; EPOXY.COM #42 did not significantly alter water vapor transmission characteristics when coated samples were compared to uncoated samples.

Chloride Ion Intrusion Characteristics

The coated samples showed a significant decrease in chloride ion penetration (>90 percent chloride exclusion).



EPOXY.COM #42 should not be used on structures under hydrostatic pressure. Do not apply when temperature is at or below 0C (32F) or on extremely windy days when evaporation of the solvent would be too rapid.


12 months when properly stored

CAUTION: COMBUSTIBLE! Contains organic solvent. Avoid inhalation of vapor. May cause skin, eye or respiratory irritation Ingestion may cause irritation.

In case of contact, immediately flush eyes or skin with plenty of water for at least fifteen (15) minutes. Call a physician in case of severe skin or eye irritation. Wash clothing before re-use. Discard contaminated shoes. Wear protective clothing, goggles, and/or barrier creams.


KEEP AWAY FROM CHILDREN - Selecting The Right Resin System