Review on 🏺 ACTIVA Permastone Casting Compound - 28 oz by Karla Richter

If you don't get enough water right away you can't add more or it won't set no matter how long you let it We messed up the first 2 boxes of these before we figured out the proportions (just 4 ordered). , and draws beautifully. We mixed colored powder into the mix and made tiny "stone" and marble swirling colored building blocks and red brick blocks and they looked great. They are not as easy to break as the gypsum blocks we make. Regular Quikcrete Mortar was used to craft the larger blocks as it is expensive for what you get and we could only find it in these small crates.