Safe, permanent waterproofing sealer for concrete, masonry, stucco or brick

GBS Penetrating Sealer is a waterborne polyester polymer and polyurethane that works best on concrete, brick, stucco and masonry. It waterproofs and preserves with 3-5 coats, plus it comes with a 15-year waterproofing warranty. Unlike topical sealers that sit on the surface and rub off with wear and tear, GBS Penetrating Sealer protects from inside the material where it can't wear away. In other words, this sealer actually becomes part of the substrate.

This sealer penetrates two to four inches deep, filling molecular voids to completely solidify the entire structure. When it dries, it becomes part of the structure creating a solid matrix. This means there's no room left for water to infiltrate and leak through. In addition, the substrate becomes stronger and lasts longer.

Dry time for indoors is apx. five days; outdoors 2-4 days depending upon temp and humidity. Allow 48 hours before walking on. Avoid using it before rain.

GBS Penetrating Sealer is solvent-free, odorless, non-flammable, non-caustic, and almost no VOC (5.9 g/l). Use it on basement walls and floors, retaining walls, pool surrounds, brick veneer walls, chimneys, fireplaces, concrete or limestone pavers, driveways, sidewalks, patios, warehouse floors, and historical renovations.

Quality Control Test results: GBS Penetrating Concrete Sealer has passed 9 independently performed quality tests per the HRP specifications. These tests include:

• ASTM 413 - “Water Absorption of Chemical Resistant Concrete/Masonry”
• ASTM C140 - “Masonry Absorption Test for Light Weight Block”. ASTM requires that water absorption cannot exceed 1% after 2 days of immersion.
• ASTM 123D - “Penetration Test for Nuclear Power Plant, 8000 psi Concrete Pour”
• Blue Dye Test - “Blue Dye Absorption Test”
• ASTM 642-82 - “Masonry Absorption Test for Brick”
• ASTM C672 - “Scaling Resistance”
• AS 1012.21-1999 - "Water Absorption of Hardened Concrete"
• NCHRP 244 – Cube Test – “Accelerated Weathering Test”
• NCHRP 244 – Southern Exposure – “Chloride Ion Penetration Test”

NOTE 1: GBS Penetrating Sealer should NOT be used in areas constantly under water such as cisterns. Also, any areas that have been power troweled, especially in basements, need to be acid etched or mechanically ground before application in order to open the pores. This product should not be used on stamped concrete.

NOTE 2: Do not use this product in working fireplaces as it is not suited to that kind of heat (may bubble and melt).

NOTE 3: If you plan on applying ceramic or porcelain tile to the surface at some point in the future, do not use this product. It will seal the concrete so well that the thinset will not adhere to the surface—unless, of course, it is etched or ground.

NOTE 4: This product will only perform well if applied correctly. Be sure to read and follow the application instructions.For proper adhesion, the surface must be:

1. Porous
2. Clean
3. Free of any other sealers, coatings, stamped concrete release agents
4. Neutral pH — between seven and nine
5. Dry

Please see the application instructions for details on each of the above steps.

NOTE 5: You can paint over this product with a 100% acrylic concrete floor paint. We recommend AFM SafeCoat Concrete Floor Paint.

A similar product, GBS Penetrating Gloss Sealer, provides a low-gloss finish.