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Williams Wide Joint Seal

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  • EverlasticĀ® Wide Joint Seal is a pre-factory cured strip of silicone sealant adhered to rectangular polyurethane backer. The polyurethane backer is wider than the joint opening and the silicone is of a lesser width than the joint opening. The backer is compressed and placed into the joint, thus holding the cured silicone in a vertical position and leaving a recess on either side of the cured silicone and parallel substrate. A wet silicone sealant is caulked and tooled into the recess bridging the cured silicone and the interface of the parallel substrate.


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