The bottom line question is this:Can I use a silicon sealant, like Dow 732, to seal a propane regulatorfitting? not, is there something else that will solve the following problem:The O-ring on the regulator of my gas grill has gone bad (again). Thisis the O-ring that should seal the nipple where it screws into theregulator itself, having nothing to do with the QCC-1 connection tothe tank. In other words, there is no (or shouldn't be any) movementat that connection.I was able to find a replacement O-ring at a mom-and-pop hardwarestore few years ago, but I tried a number of different sizes from thesame source last week and I can't get it to seal anymore. I guessthere won't be a $0.50 fix this time.Yesterday, I bought a replacement regulator and hose from Home Depot(Brinkman, $17) and it fits fine. However, it leaks at same spot -where the nipple screws into the regulator. I tried tightening thenipple with a deep socket over the valve inside the QCC-1 connectorbut it didn't budge. It does not appear that there is an O-ring onthis unit like there is on the original.I plan to exchange the item today on the hopes that the one I have isdefective, but if the replacement leaks also I'm thinking of tryingsome silicone sealant at the nipple/regulator junction.I wouldn't unscrew the nipple...I'd just spread some sealant aroundthe threads where they enter the regulator.What I don't know if whether silicon is "propane-proof" or will thepropane eat through the silicon.Your thoughts? Thanks.

I don't thing propane will eat through silicone. However I would notrely on silicone to replace an O ring. Are you proposing to put thesilicone in and then tighten and let it cure? If so, an O ring istough and somethingto tighten up against. Silicone will just squeeze out.Have you tried going to an appliance/gas grill shop?

Will Silicon Sealant Work On A Propane Regulator?

Jun 18, 2012 21 Replies

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DerbyDad03 14 years ago

The reason that there is no O-ring on the replacement part is because the replacement part is from a diffeent manufacturer.

In any case, I exchanged the replacement part for another one and this one does not to leak. The first replacement I bought must have simply been defective. The cashier marked it as such and tossed it into the "defective items" bin.

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Han 14 years ago

DerbyDad03 wrote in news:c307af35-97b9-431d-8295- snipped-for-privacy@j25g2000yqn.googlegroups.com:

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