Air- Sealing Without Foam

The gas-filled bubbles that give foam its cellular structure are durable if not stressed. But when pipes and wires air-sealed with canned foam are forcibly moved, these bubbles are easily torn apart.

To evaluate the air-sealing effectiveness of two tapes and 22 caulks and sealants ...

... the author applied multiple samples to test boards assembled from plywood, framing lumber, and sections of nonmetallic sheathed cable.

Caulks that failed the wire-movement tests typically remained bonded to the plywood but separated visibly from the outer sheathing of the cable.

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