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Old 6th Nov 2017, 8:52 pm   #2
GrimJosef
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Join Date: Sep 2007
Location: Oxfordshire, UK.
Posts: 4,310
Default Re: Best oil-proof sealant?

Depending on the surfaces that you're sealing to, bonded seals (Dowty washers) under the bolt heads can work essentially perfectly. But the instructions for their use need to be followed absolutely. The effectiveness of sealants which are applied as a gel and then cure can depend as much on factors like the cleanliness of the components being sealed, whether the seal will be subject to mechanical stress or vibration, whether the oil will be running very hot (I've worked with systems using pumped oil at well over 100C) etc as it does on what the sealant compound is. I understand that automotive sealants can be pretty good.

Cheers,

GJ
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