Round, black (charcoal), firm, resilient, polyethylene extruded closed celled foam with a water resistant outer skin. Color may be charcoal or gray, and is NOT SELECTABLE.
Provides controlled depth for sealants.
Compresses up to 50% in smaller sizes and 30% in large sizes.
D oes not stick to sealants. Exceeds ASTM standards for bond breakering materials. No bond breaker is required.
Very high moisture resistance. Will not absorb ground water.
Compatible with all know types of sealants including butyl, polyurethane, silicones, tri-polyimer, polysulfide, acrylic, etc.
APPLYING BACKER ROD:
- Joint or opening should be clean and dry and free of all contaminates, loose materials, dry, and free of water or frost.
- To install, compress backer-rod into the joint before sealants are applied. Install backer-rod using a blunt tool or a plain faced roller.
- Force the rod to the depth recommended by sealant manufacturer, (typically about 1/2 of joint width measured at the crown of the backer rod). A template or roller gauge may be used to control the depth at which the rod is placed.
- Don't stretch, puncture or tear backer-rod during installation but gently force into the joint so that the backer-rod fits tight against the sides of the joint.
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