Silicone in Clear: Can it Separate Out?

crashtech

crashtech

Combo Man & Mod
Something I read on another forum:

All clear coats have silicone built into the product. Otherwise clear coats will fisheye just from the air itself. Many years ago I ran into a clear coat only fisheye problem. It turned out to be because I was opening my cans without sloshing them around before pouring. On a new can I was pouring of the "fisheye eliminator". The rest of the can would not level itself. Small fisheyes plagued me. I always shake my clear coats out of habit and have never had that problem again.
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Has anyone heard of this? It's a new one on me, though I have had unexplained fisheye problems before that remain mysteries to this day.
 
Known as surface tensioner, derivatives of silicone or some ore but not the same as a raw silicone.
"Polyether modified polydimethylsiloxane" one type example that may be common in most clears.
Very small amounts are used and there are 100's of choices, usage ratio depending on type or types used will be 0.1-0.3 of resin weight.

These additives do a number of things from final look, to re-coating, to smoothness of application on a clean surface, such a small amount is used help with containation but not a cure all.

Can they separate out? I suppose some types could, I have never seen that happen with the four different types we use but I have a bad habit of shaking a clear can when I pick up also, may not help but it sure won't hurt.
 
Pretty neat. I've always heard old painters say if u were having a fish eye problem while spraying to squirt a few drops of 3 & 1 oil in the cup and your fish eyes would disappear lol.. Never tried that one
 
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