WHAT IS A SURFACTANT

​Surfactants work by reducing the surface tension of water. If you’ve seen water droplets bead up on a hydrophobic surface, like the hood of a freshly waxed car, you’ve seen surface tension in action by the ‘bubbles’/ beads of water that appear.

To reduce this, you will need to spray your mold with a surfactant, which wets the surface and creates improved contact between the plaster and the surface of the mold, making it bubble free.

                                                                                                             
​Mixing The ‘Casting’ Plaster—Hydro-Stone or Hydro-Cal
 
This is the easiest way to mix. The manufacturers recommend that you mix plaster by weight. For example—5 lbs water to 8 lbs. plaster. To alleviate all the measuring, the landfill method, is the easiest and nearly fail proof.