Hi all. I had just enough left in my year-old tube of MB sealant to complete an upper timing cover job. My question to you guys is --- this stuff is still VERY tacky after 24 hours (it's 35 degrees in the garage). How long should I wait before starting the car? I mean, it still has the consistancy as if I just sqeezed it out of the tube!

All old gasket material was cleaned pefectly, and scotchbrited. However, this is on a virgin headgasket motor, and I definitely am fighting the shrinking head gasket/U-shaped seal problem.

Oh yes. This is for my '95 E320. THANKS!!!