Sanded Epoxy adhesion??

O

OJ86

Promoted Users
I am getting ready to spray a complete. I am doing one last round of unreduced epoxy tonight and will wetsand with 600 on saturday and it will be ready to shoot. Now my main question is do I need to re-seal it before spraying the base or will the epoxy that is on and obviously sanded give me the same adhesion/chip resistance as I would get if I applied the base on a freshly laid sealer.

I just wont want to waste materials if i dont have to. I have no issues sealing it again with reduced epoxy, but again if i done have to I'd rather save on the epoxy.
 
I've always re-sealed before laying base, but only because epoxy has never been my final prime. I have always finished off with 2k.
 
Thats fine. I just didnt know if for best adhesion is had to be applied to a fresh round of epoxy.
 
If outside the re-coat window, is best to seal with another reduced coat of epoxy. SAT would be 5 days....I would personally seal it with a reduced coat of epoxy even though it hasn't been 7 days....just extra security.

I know some on here don't like to go over 3 days with the recoat window if shooting base over top.
 
Thanks for the replies. Just wanted to make sure I wasn't doing and unnecessary step being as it will be sanded epoxy on top. I will just carry
on like I always do!
 
im having to sand uncleared spi black base off of a 5 day old epoxy job a year later and it aint comin off easy, but anything after a couple days i give it a quickie epoxy seal job before base. depends on type of base too.
 
Rarely do I ever seal. I usually finish with urethane and wet sand. Never had a problem either way.
 
There's a durability advantage if you epoxy seal before paint, but many don't, I rarely sealed stuff years ago just because it offered less of a challenge dealing with trash and texture but you'll notice the job will rock chip easier if the sealer coat isn't applied.
 
Good points Bob and I was in the same boat. Never used to seal. Now I wonder why I never REALLY did. I was in the same mindset, but when you think about it....you have the added adhesion with sealer and add that to activating your basecoat, and you have a really strong link. We all know the base is the weakest link. Needs all the help it can get.
 
Today it is more important then ever as with cost reductions, some brands of base are losing adhesion in the process.

Nothing works better then a fresh coat of epoxy, urethane sealer or activator in the base to help out.
 
You must log in or register to reply here.
Back
Top