... drying out or embrittlensess TOP BEST-668 Automotive gap-filling butyl sealantUsed in the car tunk,door frame skeleton EPDM seal ... groove. 1,DescriptionTOP BEST-668automotive gap-filling butyl sealant is a type of netural, one-component ,permanent non ... pressure 0.34MPA)≤10GB/T13477Age resistancegood(25—30years)GB/T13477 4,Advantage(1) No flowing under high temperature, easy to ...