ASC SM Silicone Mastic is a solvent free, single component, high solids sealing and patching compound ideal for roof repairs on most surfaces. ASC SM forms a durable, weather resistant, seal used to prime and seal: penetrations, skylights, seams, sealing holes, etc. ASC SM is especially developed to seal cracks, detail areas and surface imperfections.

Superior adhesion and flexibility is weather resistant and withstands extreme elongation. Ideal for use on new and existing roofs and for roof maintenance. ASC SM is designed to be highly reflective and UV stable with direct exposure to sunlight.

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1 gallon pail

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