Caulks: Closing the Heating Gap

Reviewed by:
Rosemary Thornton
If your basement feels a little warmer than it should, you're probably losing precious heat from gaps in your ductwork. Close gaps in ductwork, pipes or flues with this heat-resistant, 100% silicone sealant.

It's designed for temperatures up to 500 degrees (constant) or 600 degrees (intermittent). Suitable for use indoors and out, it forms a waterproof seal that remains permanently flexible.

This sealant can also be on small engines, valves, tanks, appliancess and more. It adheres to glass, wood, metal, procelain and painted surfaces.

  • Product Name: Red HIGH-TEMP Silicone Sealant
  • Price is $12 and up for 10 oz. (November 2005).
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