Slick sand cure time - Chevelle Tech

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post #1 of 20 (permalink) Old Aug 16th, 08, 5:08 PM Thread Starter
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Slick sand cure time

I'm using slick sand for my car and only get about 15 minutes before it starts to cure in the pot. Not even enought time to shoot a second coat. I mixed some more up and thinned about 10% with acetone, but the same results.
Temp was about 90 dregree's.

Jim

Last edited by therightchoice; Aug 16th, 08 at 6:53 PM.
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post #2 of 20 (permalink) Old Aug 16th, 08, 5:14 PM
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Re: Slick sand cure time

make sure you aren't putting in to much hardner. I personally am not a fan of the stuff. I know it's cheaper than the 2k high build stuff but i just didn't like working with it.
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post #3 of 20 (permalink) Old Aug 16th, 08, 5:21 PM Thread Starter
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Re: Slick sand cure time

I actually have Dupont 2k high build primer, but it didn't seam all that thick compared to the slicksand. I would rather use the 2k primer, but wasn't sure if I have to shoot more epoxy over the 2k primer to seal it or if the 2k primer was good enough.

Jim
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post #4 of 20 (permalink) Old Aug 16th, 08, 7:44 PM
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Re: Slick sand cure time

I just finished my car and used 2 gallons of slicksand to get it straight. Of course, about half of it got sanded off. It worked great. I cut it about 15% or so so with slow dry or medium dry urethane thinner. After I got it pretty straight, I thinned a little more to get a little wetter spray and better flow out. I had enough time to spray a full gun cup of paint with no trouble.
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post #5 of 20 (permalink) Old Aug 16th, 08, 8:41 PM
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Re: Slick sand cure time

In 90F temps your gonna need to back off the hardener a little. Poly prime is the BEST bang for the buck when it comes to a filling prime. Not as much shrinkage as urethane either.
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post #6 of 20 (permalink) Old Aug 16th, 08, 10:38 PM
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Re: Slick sand cure time

Isn't polyprime the same as slicksand? Aren't both polyester coatings? The temp of the thinner you use can slow down the drying time. I used it in 90 degree weather.
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post #7 of 20 (permalink) Old Aug 16th, 08, 11:42 PM
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Re: Slick sand cure time

Quote:
Originally Posted by oktunes View Post
Isn't polyprime the same as slicksand?
yes, slick sand is a polyester primer.
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post #8 of 20 (permalink) Old Aug 17th, 08, 12:12 AM
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Re: Slick sand cure time

Don't play around with the catalyst proportions. If you need a longer pot life you'll need to keep it cool between coats. Drop the cup in an ice bucket until you are ready to use it but allow it to warm up a bit before spraying. The tech info suggests a 45 minute pot life at 75F but it will shorten exponentially with increased temperatures.

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post #9 of 20 (permalink) Old Aug 17th, 08, 12:47 AM Thread Starter
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Re: Slick sand cure time

I was thinking about an ice bucket to keep the product cool between coats, but was worried it might cause some problems. I was using a 2 quart pot, plugged the feed hose before I could clean it out.
I went ahead and shot the 2k filler, shoots really nice and pot life is longer, just doesn't build as thick like slicksand.

Jim
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post #10 of 20 (permalink) Old Aug 17th, 08, 2:31 AM
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Re: Slick sand cure time

The paint supply man today told me to only use Slicksand on filler, "NOT on bare metal surfaces greater than 8 by 8 inches large" . I am wondering if that is true for you guys- does the slicksand have adhesion problems on bare metal?
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post #11 of 20 (permalink) Old Aug 17th, 08, 7:36 AM
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Re: Slick sand cure time

I don't use the slicksand product, but I can say it is ALWAYS better to use an Epoxy primer on bare metal, after the Epoxy cures out, (read instructions on the can), usually takes an hour to cure. Then you can put the 2K high build primer on the area.

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post #12 of 20 (permalink) Old Aug 17th, 08, 9:58 AM
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Re: Slick sand cure time

Featherfill was the first poly I used. It was developed for fiberglass, but worked on metal. Evercoat developed slicksand specifically to use on metal. I think their reccomendations are to not use it on a large area of bare metal, but it is ok on small areas that are down to metal. If the whole car is stripped, I believe they reccomend a coat of epoxy first.
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post #13 of 20 (permalink) Old Aug 17th, 08, 11:05 AM Thread Starter
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Re: Slick sand cure time

Does the 2K primer/filler need to be sealed with epoxy.
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post #14 of 20 (permalink) Old Aug 17th, 08, 1:24 PM
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Re: Slick sand cure time

You do not HAVE to put a coat of epoxy on top of the 2k primer before you put the paint on it, but.................

I usually put a med coat of epoxy primer/sealer on top of the 2k primer before I finish sand with wet 400-600 grit.
It just makes me feel better about the final outcome.

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post #15 of 20 (permalink) Old Aug 17th, 08, 9:39 PM
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Re: Slick sand cure time

the only time i put epoxy over 2k primer is if i sand through and expose any bare metal & then I just hit the bare spots & re-apply the 2K
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