Hydrocal – Silica Flour
This tried and true mold mix combination for years.
Order separate or together, your choices are in the drop down.
Hydrocal is a high-strength gypsum cement with a low setting expansion. Adaptable to the productions of hard, strong, tough patterns and duplicator models. Has a shorter period of plasticity, stiffens more rapidly than B-11, and sets in about 15-20 minutes after mixing.
Silica Flour is a pure sand that is ground to a very fine particle size (wear dust protection always). When it is mixed with a plaster, such as Hydrocal, for mold making it adds strength and stability.
Mix equal parts of Silica Flour and Hydrocal (by weight) for a intricate, durable, and inexpensive mold.
As with all plaster materials, you’ll only be able to use this mold once. As with all dust producing products, please wear a dust protection respirator.