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).