1 lb. Plug Duct Seal Compound

Features:

Dough-like material
Helps seal conduit openings, gaps and holes against drafts, dust, moisture and noise
Easy to handle
Simple to install
Under normal conditions the material will not harden or form a skin
Non-conduction
Non-deteriorating
Non-toxic
Non-corrosive
Non-staining
Non-curable
Flash point is over 550 degree F
Temperature ranges between -20 degree F to 350 degree F