








Blok-Lok ™ sets the industry benchmark for siloxane water repellent protection. Designed to protect exterior vertical surfaces in the harshest of climates. Blok-Lok™ is formulated with siloxanes, creating a long chain water repellent barrier deep within the masonry surface.
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Substrate | Sq Ft / Gallon |
Wood | 150-200 |
Concrete and Masonry | 40-80 |
Clay Brick | 125-150 |
Stucco | 100-150 |
Dense Masonry Surfaces | 125-150 |
Wood | 150-200 |
Clay Block | 50-60 |
EFIS | 80-120 |
Concrete Curing | 300 |
To apply, surface moisture content must be less than 25% as measured with an electronic moisture meter. Surfaces must be free of dirt, grime, efflorescence, lime run, construction debris, form oils and release agents, chalked materials, loose and peeling paint, mold, mildew, etc. All cracks should be pointed or caulked.
Do not apply if rain, snow, or temperatures below 40°F are expected within 48 hours. Do not apply if relative humidity is greater than 80%.
Mix with 9 parts water & 1 part product (9:1 Mix Ratio)
Apply Blok-Lok™ with low-pressure airless spray equipment. Use a spray tip size of .035 to .062. Hold spray head 8 to 12 inches from the surface. Multiple coats may be applied, yellowing will not occur. Blok-Lok™ dries in 1 hour and fully cures in 5 to 7 days.
TECHNICAL DATA SHEET | SAFETY DATA SHEET (RTU) | SAFETY DATA SHEET (CONCENTRATE) | ARCHITECTURAL SPECS | LEED CREDITS
WARRANTY PRE-REGISTRATION (DIGITAL) | WARRANTY PRE-REGISTRATION (TO PRINT)