Soft Type Backer Rod is a soft, grey, pliable, non-gassing backup material inserted into an expansion or contraction joint to control sealant depth, create a backstop to allow proper tooling, ensure sealant adhesion to joint surfaces only and to yield a proper bond break between backup material and sealant.
***550-Feet per Pony Pac***
Ideal in irregular joint applications particularly where self-leveling, flowable sealants are employed. Also recommended with sealants where bubbling concerns are critical. May also be used in place of most standard backer rod applications. Compatible with all known cold applied sealants including butyl, polysulfide, acrylic, polyurethane and silicone.