The GAF Water-Block Mastic is a one-part, butyl-based, high-viscosity sealant specifically formulated for sealing between flashing membranes and substrate surfaces.It is suitable for applications behind exposed termination bars and between roofing membranes and drain flanges.
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selection not available, try a different combination
The GAF Water-Block Mastic is a one-part, butyl-based, high-viscosity sealant specifically formulated for sealing between flashing membranes and substrate surfaces.It is suitable for applications behind exposed termination bars and between roofing membranes and drain flanges.