Why are sealant backing materials important, and how do they improve sealant performance?

Why are sealant backing materials important, and how do they improve sealant performance?

Sealant backing materials (backer rods, foam fillers etc.) serve as a substrate for the sealant, control joint depth, aid in shaping the sealant profile, and prevent three-sided adhesion. They ensure better performance, correct geometry, and longer life cycles.

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