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Old 09-17-2018, 01:02 AM
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2k Primer reacting

Hi!

My 2K primer is reacting in some places.
I did add 5% thinners, could that be the culrpit? I've never seen 2K primer react before with previous paint. Previous paint is atleast 15 years old.

Thanks!
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Old 09-17-2018, 11:43 AM
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The previous paint is more then likely some kind of un-catalyzed product, lacquer or enamel of some sort and the solvents in the 2k are biting into it. What you have to be careful of is even if the 2k goes down ok the solvents can still penetrate that layer and make it soft or gooey in the middle of it all and lead to durability issues.
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Old 09-17-2018, 12:23 PM
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The very first place something like that will do this is where the substrate was sanded thin. The solvents from the primer are soaking through it and lifting it from what it was applied to.

The best trick is to sand it out, then apply primer drier so that the solvents flash off before they can soak through.


Brian
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Old 09-17-2018, 12:46 PM
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Yep, solvent penetration of a sensitive substrate. Adding thinner did not help. Be sure to sand off all the loose stuff until it featheredges nicely.
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Old 11-16-2018, 01:39 AM
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Quote:
Originally Posted by idrivejunk View Post
Yep, solvent penetration of a sensitive substrate. Adding thinner did not help. Be sure to sand off all the loose stuff until https://touchscreenwifirouter.com featheredges nicely.
Great advice!
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