This synthetic fabric is fantastic for reinforcing rubber when making a brush on mold. Particularly well suited for use with silicones; especially Smooth-On's EZ Brush Vac Bag. When incorporated in this silicone, it is possible to make thin, tough molds that are virtually impossible to tear. By using a minimal amount of rubber and supporting it properly it is possible to make very light weight, durable, cost effective molds. This fabric will work in other rubber mold materials as well to enable one to make durable, long lasting molds that will still stretch and flex without tearing.