Lousy product. Scam! Expensive. Tried it just now to seal some unused mounting holes in my Sears Roof Top carrier. Squirt, squirt... Empty! Wouldn't even fill 10 small (5/8) holes before it went empty. Not more than one tablespoon of product in 2 oz can. Save your money and try duct tape or stainless steel duct installation tape. There ought to be a law (like the old days when consumers were protected from scam artists like this. Now they're all in Congress)...