lil bit of acetone on a paper towel
On the gimble flange use OMC gasket sealer, Merc Perfect Seal is the same product. Permatex Aviation will work if you can’t find the other 2. The advantage of using gasket sealers is that they keep out water and water under that bellows lip even if it does not cause a leak into the bellows right away can cause corrosion of the flange sealing surface which will eventually cause a leak....