ProSIl 1025 RTV Silicone Mold Making Rubber Kit (Gallon)

This worked really well for reusable molds. Its a little tougher than some others so it doesn't tear easy but it doesn't stretch as much making demolding a little harder. Great for rock climbing holds

Lid only pulled a little then stopped making it nearly impenetrable to get the lid off. When I finally did the stuff wheat everywhere making a mess. And this is like a sticky goo! Poor manufacturing on container! Product wasted could not make a cast.

I’ve been making silicone molds for years. I chose this for the quick shipping as I had a deadline. Like others stated, there is not enough hardener included for the silicone. I weighed it out carefully on my scale and followed the directions exactly. My mold didn’t harden at all in a few places and thus failed! Very expensive and USELESS! Spend your money at Brick-in-the-yard mold supplies. I’ll never use this crap again!

I wanted to make a mold of an Air dry clay sculpture that I made. The silicione was easy to mix and has a nice smell. I dried fast. No release agent was needed. The only problem is that the quantity was not enough to cover all the sculpture, had to complete with caulk silicone and corn starch but it worked very well. For the first time I casted a cement sculpture with this mold, worked fine, the nose broke but put it back. I liked this product very much.

I used this silicone to make molds of crystals. It is pretty thick and definitely needs a vacuum chamber. It has been super frustrating and time consuming to get enough bubbles out; I had to run my vacuum chamber many times. I’ve used thinner /lower viscosity stuff in the past and was trying to save money by buying this product. The time spent to make this work has not been worth the money I saved, that is for sure. If I weren’t making anything too intricate, I might like this stuff more. I would wait more than 24hrs to demold your model. After fully cured, it feels pretty durable, yet flexible enough. I haven’t finished it off yet, so I’m hoping there’s enough hardener cuz it didn’t look full upon arrival.

This stuff is hard to pour without making a huge mess and doesn't self de-gas like the other silicones I've used. I'm worried I will run out of the hardener before the liquid rubber because they gave me exactly how much I'd need for mixing the whole tub and each time I pour the hardener it dribbles down the side of the stupid bottle. I have not had luck making good molds with this silicone. I only have a heat gun and an air dryer and no vacuum chamber. I tried pouring very slowly and blowing out as many bubbles as I can in between layers, but so far my molds are full of little bubbles. My other silicone molds are completely smooth with zero bubbles and I poured those much faster and didn't have a heat gun or air dryer when I made those molds. I plan on making more molds in the future so I thought I would buy in bulk, but there's no point if it's not creating a good enough mold to use.

Tin based silicones are not usually clear (heavy opaque blue/pink/green/etc), this one is actually see through. Kinda like Sorta-clear from smooth on (not glass clear, but enough to see through during filling/removal) Very durable and stretchy, used the molds 10-20x so far and no signs of deterioration. Adheres very well to existing molds (patch/repairs).

The first time I bought 2 gallons for one mold. I mixed and degassed each gallon separately. The mold came out fantastic and is very durable. Then I ordered 1 gallon and used a small portion for a practice mold. Again I was impressed. So I got 2 more gallons for a larger project. I Was disappointed to see the packages laying down and leaking and the hardener bottle levels low...(no leaks, They were sealed). Ever the optimist, I mixed both up anyway. Now I have a floppy, useless $260 mold. My bad. If you buy and the hardener weighs under 400 grams (bottle and fluid) return it. Otherwise it's a great product.