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Thread: Gray spray paint for muffler - advice ?

  1. #1
    Senior Member 911T1971's Avatar
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    Gray spray paint for muffler - advice ?

    I recently mounted a new muffler from Dansk (regular steel, not stainless steel).
    Now, the center area is loosing the grey spray paint, due to heat and use.
    Im planning to spray it again grey.

    Q:
    What brand would be good to use ?

    Q:
    Re the heat-exchangers, are/can they actually treated with the same product?

    Thx in advance

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    Registry member No.773

  2. #2
    I use VHT SP118 FLAT WHITE Primer followed by VJT SP104 FLAT GRAY...never lost a single bit of the paint on three different steel mufflers.

  3. #3
    Senior Member 911T1971's Avatar
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    Quote Originally Posted by mac73s View Post
    I use VHT SP118 FLAT WHITE Primer followed by VJT SP104 FLAT GRAY...never lost a single bit of the paint on three different steel mufflers.
    Thx, good input. It was done by a shop..my previous muffler did not had this problem.
    I suspect a primer was not used because part of the muffler steel is again blank and Dansk can be read..the muffler paint was „in use“ less than 500 miles. thx again.
    Registry member No.773

  4. #4
    Member #226 R Gruppe Life Member #147
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    I’ve used the VHT SP104 for 35 years without any primer or problems. It must be sanded and super clean before application.

  5. #5
    Senior Member 911T1971's Avatar
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    Thx, inputs very appreciated.
    Registry member No.773

  6. #6
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    Not exactly what you were asking about, but a friend just had his muffler coated with cerakote. It looks great, and my understanding is that it’s also very durable and acts as a thermal barrier.
    Member #3857
    '70 911 2.7

  7. #7
    I have used POR 15 high heat manifold gray on exhaust systems and manifolds ( BMW ones ) with great success does not burn off, turn color and stays pretty much the same gray If it stays on the cast iron manifolds, I would guess that it will stay on the muffler

  8. #8
    I use cold galvanizing compound spray paint, LPS and CRC brands work best for me, Rustoleum not as good. Doesnt cost a lot and dries fast.

  9. #9
    I've been pleased with Stoddard's latest incarnation of factory grey muffler paint:

    https://www.stoddard.com/nla09500600.html

  10. #10
    Senior Member
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    Does the Stoddard paint still turn pink where the muffler gets hot ?

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