Durham's Rock Hard Water Putty

An extremely inexpensive and heat resistant cold curing rocket nozzle material. Just add water then cast into your desired shape. Can be machined after cure.

Durham's Water Putty is a plaster based compound, however it includes other materials that impart the following characteristics:

• It contains a material to increase the hardness and better bind the product together. This also imparts a smoother and almost "glazed" surface and increases the ability to adhere to surfaces.

• It contains a material to inprove the smoothness of the mixture, improving the surface smoothness characteristics and help it pick up more detail in casting and molding operations.

• It contains a material that slightly colors it to its light yellow color.

The formulation is a trade secret, but in general, Durham's makes an excellent repair and casting medium because it provides a very smooth, strong, and stable result that is easily workable when wet, does not shrink, adheres well in all sorts of voids, and is able to reliably replicate detailed surfaces.