... 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 ... out or embrittlensessUV resistanceSolvent-freeEnvironmental friendly2,Application areaGasket, gap-filling for automotive doors, windows, inside and outside panels, ...