Primers and Urethane Sealers.

Barry

Paint Fanatic
Staff member
This has been a massive year for spi epoxy and primers as getting a lot of shops from the majors from not having a product or whatever other reason

So a couple of things to think about!
1) how do we set the gell time on SPI primers.
First, we set them with an automatic gel tester, but we go a step further.
I mix each batch 4.1 and leave out the reducer if required, as the reducer will lengthen the gel time.
I bring the cup to my desk with a paint stick, and every 5 or 10 mins stir, I want no start of thickening for 45 minutes.
SO that is WHY we say get the product out of the gun in 30 minutes.

Urethane sealer, yes it is thicker than the majors, and yes, we recommend 4.1.1 and a 1.4 tip
However, many old majors users use a 1.3 tip because their sealers are water-thin, so you can add a reducer to make it spray as you want.
If I thin it down, im making money; if you thin it extra, you are making money as the reducer costs less than the product by at least 50%.

Also, if you see the primer gelling in 5 to 15 mins in the mixing cup, it is time to buy a different brand of mixing cup; I have never seen a problem with the majors mixing cups such as PPG, Dupont or Sikkens, but I have now run into problems with some private label mixing cups.
 
This has been a massive year for spi epoxy and primers as getting a lot of shops from the majors from not having a product or whatever other reason

So a couple of things to think about!
1) how do we set the gell time on SPI primers.
First, we set them with an automatic gel tester, but we go a step further.
I mix each batch 4.1 and leave out the reducer if required, as the reducer will lengthen the gel time.
I bring the cup to my desk with a paint stick, and every 5 or 10 mins stir, I want no start of thickening for 45 minutes.
SO that is WHY we say get the product out of the gun in 30 minutes.

Urethane sealer, yes it is thicker than the majors, and yes, we recommend 4.1.1 and a 1.4 tip
However, many old majors users use a 1.3 tip because their sealers are water-thin, so you can add a reducer to make it spray as you want.
If I thin it down, im making money; if you thin it extra, you are making money as the reducer costs less than the product by at least 50%.

Also, if you see the primer gelling in 5 to 15 mins in the mixing cup, it is time to buy a different brand of mixing cup; I have never seen a problem with the majors mixing cups such as PPG, Dupont or Sikkens, but I have now run into problems with some private label mixing cups.
EZmix is still ok, correct?
 
I am new to this or any forum. If I am out of line-pardon. I am trying to find a replacement for an old Dupont/Axalta product. Prime-n-Seal 2610s. Any words of wisdom? I use Chroma base.
 
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