This product is designed for non-polar diene rubber (such as: natural rubber, SBR, BR) and non-polar two olefin thermoplastic el 771 ... : natural rubber, SBR, BR) and non-polar two olefin thermoplastic elastomer (such as: CR,NBR,SBR, TPR) and other hard to bond ... kind of mat products. In addition, using this product treated rubber surface will not change color, mechanical strength will not change ...