It is a high viscosity engine sealant that cures when exposed to air. This engine sealant is also oxygen sensor safe. Cooling System Leak Sealant. Our goal is to exceed your expectations. And we’ve built a system to do just that.
ACDelco GM Original Equipment 10-108 (12378255) Cooling System Sealing Beige
ACDelco 10-108 Cooling System Leak Sealant