Our old but still serviceable propane tank has begun leaking slightly around the plate where the guage is screwed on. The screws are painted on too heavily to tighten the screws without risking breaking them, so wondered if there is a quick acting sealant that might be used around the base of the mounting plate. Any experience or thoughts? We did talk to the propane supplier, but he didn't know, and was going to check with someone and get back to us, but so far, hasn't. Unfortunately, we weren't able to stop the guy who came and filled it before he did so. Thanks for any advice!