The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Questions about primers, prep and such, for parts

Bigboy4613 · 03-24-2017, 01:40 PM

2 schools of thought here, self etching primer followed by a urethane 2k primer . Then you have metal prep followed by a epoxy primer. Those are the two main ways of going from bare metal up. Self etching primers have phosphoric acid in them and is why they are good over bare metal and they have a 2nd benefit which is after a short flash time you can put a multitude of different products on them except anything else containing phosphoric acid. Now to metal prep and epoxy. Metal prep is phosphoric acid based as well and after it is used and has conditioned the metel epoxy primer is used to seal the metal. Both ways are good but two phosphoric based products should never be used together it creates problems.

03-24-2017, 01:40 PM	#3
Bigboy4613 Registered User Join Date: Mar 2017 Location: Alvin tx Posts: 9	Re: Questions about primers, prep and such, for parts 2 schools of thought here, self etching primer followed by a urethane 2k primer . Then you have metal prep followed by a epoxy primer. Those are the two main ways of going from bare metal up. Self etching primers have phosphoric acid in them and is why they are good over bare metal and they have a 2nd benefit which is after a short flash time you can put a multitude of different products on them except anything else containing phosphoric acid. Now to metal prep and epoxy. Metal prep is phosphoric acid based as well and after it is used and has conditioned the metel epoxy primer is used to seal the metal. Both ways are good but two phosphoric based products should never be used together it creates problems.