| abstract |
There is provided a silicone rubber composition comprising an organopolysiloxane having a viscosity of at least 250,000 mPa.s at 250C, treated filler, and an organic peroxide curing agent. The composition is substantially free of reinforcing silica fillers and is characterised in that the filler comprises a mixture of aluminium trihydroxide and kaolin in a ratio of from 1 :3 to 4: 1. |