Marathon Heater [India] Pvt. Ltd. Manufactures Heaters with Silicone Rubber Seal. Marathon Heater [India] Pvt. Ltd. Manufactures Temperature Sensors, High Quality Heaters etc. The Heaters with Silicone Rubber Seal used with silicone rubber lead wires provides an effective moisture seal up to 400 degree F [200 degree C]. The Heaters with Silicone Rubber Seal is generally the most impervious of the moisture seals. In order to protect the seal, a 1"inch unheated section is recommended.
