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Overview
Solvent-based, Water-based, Rubber-based, Low-Tack Primer to Provide Adhesion to VaproShield self-adhered roof and wall membranes
- Designed to be used in ambient and surface temperatures of 40°F (5°C) and rising
- Solvent-based, water-based, rubber-based low-tack primer specifically formulated to provide excellent adhesion
- Prime as needed all required surfaces
- Apply with a roller or brush
- Apply to a clear, dry, dust free, and frost free surface
Installation Application
VaproTak SB may be applied with roller or brush. A roller with a heavy nap should be used to carry sufficient material to the area being primed.
Apply VaproTak SB to a clean, dry, dust free, and frost free surface at a coverage rate of approximately 250-300 sq.ft. (23.2-27.9 m²) per gallon on concrete.
Exterior gypsum sheathing board products will vary in texture, performance and porosity. The coverage rate for VaproTak SB will be less over concrete substrates. Specific testing for coverage is recommended.
Other substrates may vary in coverage, please test accordingly. The primer should be sufficiently spread to avoid areas of excess material.
Areas of excess material will lengthen the curing time on the application of VaproTak SB.
For best results apply VaproTak SB and allow it to become tacky to touch. Porosity of substrates could affect the tackiness of the primer; timing may vary due to atmospheric conditions. At this point the membrane overlay should be applied.
Limitations
Limit the application of primer to what can be covered with VapoTak SB in one working day. Any areas not covered with membrane during the day must be recoated, and be sure to cover all open containers when not applying primer. If primer dries and is no longer tacky, then reapply the primer.
When used on horizontal surfaces, the primer's tacky nature may cause adhesion/bond to unwanted materials; so precautions must be used in this application.
