This Gardner Bender duct seal compound is a malleable, non-hardening material for sealing electrical conduit openings against drafts, dust, moisture, and noise. The dough-like compound is easily pressed over holes and gaps for a quick, reliable seal.

• Seals conduit openings, terminal boxes, pot heads, and bushings
• Protects against corrosive elements and deadens panel noise
• Non-conducting, non-toxic, non-corrosive, and non-staining
• Will not harden or form a skin under normal conditions
• Temperature range: -20 deg F to 350 deg F
• Flash point: over 550 deg F
• 99% solid, butyl rubber composite
• 1 lb plug
• Not for outdoor use

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