Spot Primer
- This topic has 7 replies, 5 voices, and was last updated 11 years ago by .
- Posts
I have a body shop and quite often when the technician is sanding a primed part he will cut through to body filler in some small areas and will have to mix 2K primer and reapply etc. I am considering covering these small areas with a spot primer made by Sikkens that comes in a rattle can, any thoughts on the cons and pros of this plan? I understand there will be shrinkage because it’s a 1K product and the sanding scratches may appear later on down the road, but due to the size of these small spots that are cut through and will be requiring priming I would be willing to risk it, any other downsides to using a spot primer for sand through parts?
I would not recomend a rattle can hardner for the simple reason that Sikkens wont waranty directly spraying basecoat over 1k primer. I dont even know why the paint companies sell a 1k, I dont believe any of them waranty it But I could be wrong. I would recomend a U.V. cured spot primer. Good luck.
I’d try and stay away from it, if your cutting to the filler the rattle can primer won’t give you the build you need. Downsides would be decreased adhesion/durability and sinking, also sometimes you can run into compatibility issues when you topcoat it.
mixing up a few ounces of 2k doesnt cost that much and i will be a better repair in the long run. blow some primer on and by the time you are done masking it will be ready to scuff up.
1k has no business even being in a body shop if 2k isn’t fast enough put infrared light on 12 minutes ready to go 1k will always bite you
Without casting any aspersions on the previous posters I disagree. I use Cromax (Dupont) and their 1K primer is part of their approved methods. We use it out of a gun rather than a can but it is more than capable of hiding scratches as coarse as P180 although we do finish to P320. It’s fast, sands easily and, if used according to the TDS works just fine. We do use 2K primers for bigger repairs but for small ones the 1K has always worked for us.
I’ve discussed its’ use with the rep and he has no problems with it at all, in fact told me that he uses it himself on restoration projects. Obviously, discuss with your Sikkens rep and go with his recommendation.
Nft5 which 1k are you using? Is it a waterborne? I don’t believe the rattle can primer is warantied under DuPont. I know Standox dosent warranty rattle can 1k however there is some waterborne 1ks that are warranty approved.
Primer is 131S [url=//http://www.axalta.com.au/assets/pdf/intranet/TDS/DuPontRefinish/1131S_Fill_n_Sand_1K_Acrylic_Primer.pdf]TDS here[/url]
We also use the Duxone one which is the same product, rebranded.
They’re both solvent based. I don’t know if the spray cans are warranted but they are the same product – just overthinned so they’ll spray out of the can. We mix 1:1 which gives plenty of build when applied with a 1.8mm gun in two coats.
I had a long discussion about it with the rep and he has no problems with it so long as we allow flash times and sand back. Never had any adhesion issues to base coat over it and adhesion to substrate is just the same as any other primer. Obviously needs etch over bare metal. If area is well prepared then a thinner coat is fine just as a surfacer. Either way it sands very fast and gives a really nice base. Works for us.
- You must be logged in to reply to this topic.