Dow Corning 3-6548 Firestop FoamDow Corning 3 6548 Silicone RTV Foam is a medium density, two part product supplied as A and B liquid components. The A component is black and the B component is off white for easy identification and inspection of mix. When the A and B components are thoroughly mixed in a 1: 1 ratio by either weight or volume, the product will expand and cure to a foamed elastomer at room temperature. A mild exotherm is exhibited during the curing reaction. The 40 Kit
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