![GAF Silicone Mastic - 3.5 GAL](http://hydrostopshop.com/cdn/shop/products/ScreenShot2022-02-14at1.33.08PM_315x308.png?v=1644863630)
GAF Silicone Mastic - 3.5 GAL
$420.00
SKU 891402
GAF Silicone Mastic is a thick, high-build silicone sealant. Provides protection against leaks due to ponding water.