Smooth-On Universal Mold Release - 14 Fluid Ounce Aerosol Can

perfect for the job and exactly as described.

Used this for epoxy pour, it worked well.

Satisfied customer.

That said, it's not bad.Smooth-on's instructional videos say that you should slather this stuff on when you're making a two-part mold, so the mold halves won't stick together, and things resin-cast don't stick to the mold pieces, and the molds will last longer. A little-right's better than all-wrong, I guess.This stuff does NOT keep the two halves of a rubber casting mold from sticking together; far from it. I had to hand-carve two rubber bricks open before figuring the trick out (don't use this; use Vaseline or something similar on the contact faces).This stuff DOES slick the pieces of the mold up so that when you pour in your resin (I do two-part squash molds, so I'm rough on my molds) it won't stick to the rubber nearly as much. There'll always be a little cling, but this does minimize that. For those of us using the less-expensive weaker and 'tear-prone' molding rubbers, this does extend the life of those otherwise-limited rubbers greatly. Sometimes you really have to slather it on, in contravention of given instructions, but it does that "release" job pretty well. Get a can or two if you're going to be doing a serious amount molding; it'll make your investment in the rubber of the mold go that much farther.

I have a few large silicone molds for projects. I used to use epoxy tape to prevent sticking of the epoxy in the seams. I didn't think a release spray would work and didn't want to lose my project (or the mold) because of bound epoxy. I finally used this on the sides of one of the molds because the silicone surface had some scratches that might promote sticking. The spray worked so well that I only used it for the next new pour. There was essentially no sticking. The piece popped out so easily ... I'll never go back to tape for this. I recommend it strongly and will continue to buy. No complaints; great product.

It works fantastic; beeswax slips right out of the mold.

This stuff is great! Not sure why people are saying it doesn’t work for silicone molds- I’ve never had an issue with my resin bonding to molds as long as I’ve been using this. The only thing to make sure of is that you spray it outside!! If sprayed above hard floors inside, it makes it EXTREMELY slippery. I couldn’t figure out why the hell myself and my family kept slipping and falling in the entry to my art room and the hallway leading to it, but finally figured out that me spraying molds inside the room, even in small amounts, was the culprit.

Doesn’t take a lot to work really well.