I bought a gallon of it. Wish I hadn't. Used a half a gallon in the engine bay and front frame area. Then it sat for 6 months. I opened it to do the inside surface of the Front Bumper, and it had a 3/4 inch skin in the top of the can. So I fished it out, stirred it and used it on the Bumper. Then I tossed it..:BangHead::BangHead: