https://www.crlaurence.ca/products/brands/listing/J01F_XX
Backer Rods & Insert Tools | CRL
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https://lakefrontsupply.com/caulk/backer-rods/chemlink.html
ChemLink - Backer Rods - Caulk
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https://www.mpsconcrete.com/faqs/what-is-a-backer-rod-and-why-is-it-used-53
Backer Rods in Joint Sealing | Preventing Failure
The backer rod is the unsung hero of joint sealing. It controls depth and prevents three-sided adhesion failure. Find out why we use it.
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