Making Body Molds with Silicone Rubber

Think body molds; think alginates! Indeed, alginate is the material of choice for capturing molds from the live human body as it is completely safe for the skin. This natural organic material sets quickly and the level of detail is also superior.

However, alginate comes with its own set of drawbacks. For instance, alginate can easily tear during demolding. Even if you manage to demold properly, the molds tend to shrink on contact with air as the water evaporates. They will start losing details within a few hours itself and are mostly unusable after 24 hours or so. Therefore, you have to cast them quickly; within an hour or two at best. Again, these are waste molds as you cannot even consider using them for making multiple castings.

Moreover, you cannot cast resins or polyurethanes in alginate molds. They are mostly suitable for plaster casting only.

Another option

Not many people may be aware that silicone rubber can also be used for making body molds! Indeed, skin-safe silicone is available in the market and LifeRite Skin Safe Silicone from the house of EnvironMolds is a good option.

This 2-part RTV silicone rubber is suitable for life casting and can be easily sourced from The body molds will turn out tear-resistant and have a long life.

They can be used again and again for making resin, polyurethane or plaster casting, making it possible to replicate multiple copies using the very same mold!