Reply To: Mid 50’s OMC head gasket sealer?

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January 16, 2020 at 11:57 am #192207
Don
Participant

    US Member

    Well, the manual is correct. Some sealers have chemicals, or perhaps copper, that will react with the aluminum and promote corrosion. I am not going to make a blanket statement on what sealers can/can not be used, because I am not a chemist. But, I would certainly read the directions on the sealer you wish to use, hopefully the directions would caution against using on aluminum parts if this is an issue.