GAF Premium Brush-Grade Acrylic Flashing (Formally HydroStop® ButterGrade)
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GAF Premium Brush-Grade Acrylic Flashing (Formally HydroStop ® PremiumCoat® Butter Grade Flashing) is a water based, high solids elastomeric sealant that provides increased tensile strength and elongation
Its thick, buttery consistency allows it to be easily worked into gaps and heavily alligatored areas. It has excellent adhesion to asphaltic roofing, metal, concrete, wood, Hypalon® and SPF.