MasterSeal 920 is a closed-cell, polyethylene foam joint-filler and backing for elastomeric sealants. Its resilience accommodates dynamic joints.

Features

• Closed-cell polyethylene foam for low moisture absorption
• Lightweight, installs easily and quickly 
• Resilient—accepts joint movement 
• Nonimpregnated, nonstaining, and nonbleeding, will not discolor sealants or substrates
• Inert for compatibility with cold-applied sealants
• Round to give proper shape to sealant for effective function
• Nonadhering to sealants, requiring no additional bondbreaker