Articles made of rubber for insulation purposes, namely rubber sheets; articles made of rubber for jointing purposes, namely, rubber joints; articles made of rubber for protection purposes, namely rubber sheets, rubber sheets for use as target backings at rifle ranges and similar shooting areas; rubber linings for tanks and silos, rubber protectors for marine lock gates, rubber protectors for marine dredgers and barges, protective rubber curtains for road sweepers; articles made of rubber for sealing, namely general purpose silicone rubber sealant; articles made of rubber for use in shock absorbing, namely rubber shock absorbers for industrial machinery; gaskets made of rubber; packaging materials of rubber, namely, industrial packaging containers of rubber; packing padding of rubber for shipping containers; rubber for electrical insulation; rubber for heat insulation; rubber for sound insulation; safety curtains of rubber; shock absorbent padding of rubber; shock absorbent insulation of rubber; waterproof membranes of rubber for use in veterinary operating and recovery rooms, tanks and silos, and road sweepers; covers made of rubber for protecting mechanical components, namely rubber sleeves and rubber sheets;devices of rubber for the protection of machinery, namely rubber sleeves and rubber sheets; protective covers of rubber, namely rubber sleeves, rubber sheets