Room temperature curable silicone elastomer composition

A one part room temperature curable silicone elastomer composition where the uncured composition is hand-moldable and has a Williams plasticity from 80 mm to 900 mm, consisting of hydroxy-terminated poly(dimethylsiloxane) having a viscosity greater than 350,000 mPa·s (25° C.), filler, crosslinker, curing catalyst, and optionally, one or more other components selected from the group consisting of adhesion promoters, fragrances and pigments, wherein

• the amount of hydroxy-terminated poly(dimethylsiloxane) having a viscosity greater than 350,000 mPa·s (25° C.) is 20-60% by weight;
• the filler is a combination of 3-66% by weight of reinforcing filler and 10-60% by weight of extending filler;
• the reinforcing filler is selected from the group consisting of precipitated silica, fumed silica and carbon black;
• the amount of crosslinker is 2-6% by weight;
• and
• the extending filler is selected from the group consisting of calcium carbonate, clay mineral, talc, quartz, mica, titanium dioxide, alumina trihydrate, wollastonite, barium sulphate, antimony oxide, magnesium hydroxide, calcium sulphate, feldspar, nepheline syenite, microspheres, synthetic silicates, bagasse, coconut hull/fibre, cork, corn cob, cotton-based fillers, gilsonite, nutshell flour, rice hull, sisal/hemp, soybean, starch, wood powder, wheat flour, and glass.