Stone Master Molds Rubber Molds for Concrete, Slate Texture, Wall and Column Cap/Hearthstone/Paver, 17.25″x17.25″x2″

Stone Master Molds Slate Capstone Mold, 17.25"L x 17.25"W x 2"D

Create your own hearthstones, capstones, column caps, and pavers with Stone Master Molds concrete capstone mold. The top is a stone texture and the four sides are chiseled. The finished product that you pour will be approximately 17.25" long x 17.25" wide x 2" thick/deep.

In fact, our molds require NO release agent.  Consequently, this saves you money, time, and clean up, as well as easy, clean release of face color pigments, unlike plastic molds, urethane molds, and silicone molds.

Furthermore, you can pour hundreds of times with this professional quality mold!

Made in the USA, both materials and labor.

Manufactured Stone Basic Mixing Procedures Using A Pre-bagged Concrete Mix for your Capstone Molds:

This is one suggestion for mixing the concrete for the capstone molds. There are many other instructions available online, including videos.

BE SURE TO USE A CONCRETE MIX THAT CONTAINS PORTLAND CEMENT. We recommend Sakrete Maximizer, as it has lightweight aggregate, is high strength, and yields more product, but there are many kinds you can use. Follow the manufacturer’s instructions for mixing.

If using pigment, add desired iron oxide pigment to mixer (100% pure, no additives). These can easily be found on Amazon, etc.

In addition, a plasticizer can be added to reduce the amount of water in the mix. Pour into the molds which may already have coloring additives… NO RELEASE AGENT NECESSARY. Vibrate molds to release air bubble.

Finally, cure the concrete in the capstone molds for approximately 24 hours at the minimum of 70 degrees Fahrenheit before demolding. Higher humidity is desired. Furthermore, molds can be covered with a tarp to retain more heat and humidity. Continue to cure demolded stones at 70 degrees or greater until ready.