MasterSeal® 920 is a closed cell polyethylene foam with a tough, nonporous skin. Specially designed for use as a back-support strip for cold applied sealants.
Can be easily applied with a blunt rounded tool, and should be installed to a depth permitting the sealant to be applied in accordance with the manufacturer’s recommendation. MasterSeal 920 diameter does not exceed the width of the joint by more than one third.
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