Description
Frost King’s Poly Foam Backer Rod reduces the amount of caulk you need to fill large openings. It’s non-absorbent. So, it works with virtually every type of caulk and sealant. It’s also compressible which allows it to snuggly fill cavities. Just press in place, then caulk on top of it.
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer.
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