Glas-Col heating tapes are ribbon-type heating elements running length wise in the tape and encased in durable glass braid and impregnated and covered with tough silicone rubber, which insulates stranded terminal leads at one end and waterproofs fittings at both ends.  Heating tapes are ideal for use in high moisture areas, are resistant to most laboratory environmental conditions, and easily pass a 1,000V test for electrical insulation.  Temperature limit 480°F/249°C