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    Thread: I need a plastic primer recommendation

    1. Member
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      04-17-2012 12:17 AM #1
      I have some rigid plastic engine bay parts that need painted. Some will be base/clear and some will be single stage urethane. In the past I have used SEM aerosol plastic adhesion promoter with decent results, but what should I be using under real paint? I usually use PPG products if that matters.

    2. Member
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      Louisville, KY
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      04-17-2012 08:02 AM #2
      I like "Bulldog" adhesion promoter, it comes in either an aerosol can or
      by the quart can for putting in a spray gun.
      I prefer to use my gun to spray it.
      That's for any bare plastic.
      After that I always use epoxy primer if I want super good adhesion.
      that really makes a difference for items like bumpers in reducing
      road rash. Not all epoxies are flexable, I use one by SPI that is.

    3. Member spitfire481's Avatar
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      04-17-2012 02:09 PM #3
      i agree. i use bulldog on all my raw plastic then prime with ppg 3055 (our standard shop primer)

    4. Member johnnynumfiv's Avatar
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      Jan 23rd, 2007
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      Milford,CT
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      04-18-2012 11:07 PM #4
      I use glasurit 934-70 one step plastic primer. Simply clean with plastic cleaner, apply the 934-70 as the first coat followed by 285 primer coats. I used to use bulldog, but it's not covered under glasurit's warranty.

    5. Member
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      04-18-2012 11:13 PM #5
      I think I will try the Bulldog, thanks everyone!

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