DAP® BUTYL-FLEX® GUTTER & FLASHING SEALANT is a single component, butyl rubber formula ideal for sealing seams, joints and gaps on metal surfaces such gutters, flashing and roof penetrations. It adheres to wet or damp surfaces and forms a 100% waterproof and weatherproof seal. The durable seal stays flexible to resist cracking and crumbling due to temperature extremes and weathering. Provides strong adhesion to a wide variety of building substrates. Paintable. Meets ASTM Specification C1311. Exterior use.
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