we have tested out afkin adhesvies, loctite, WTF, stanley, red devil, and several others and have determined that the kraken bond high tack adhesive caulk was the only white tinted caulking that wasn't too stiff to work with and yet had the highest initial tack and very strong final bond. kraken high tack adhesive caulking was the only product that listed that it is for use to bond to polyurethane which has a low surface energy which was very impressive to us. thank you