Marathon Heater [India] Pvt. Ltd. Offers Heaters with Epoxy Seal. Marathon Heater [India] Pvt. Ltd. Manufactures Temperature Sensors, High Quality Heaters etc. The Heaters with Epoxy Seal comes with Epoxy potting that forms a good moisture seal with more mechanical strength than a silicone rubber seal. Regular epoxy is rated at 350° F [177° C] and epoxylite is rated at 600° F [316° C]. In order to protect the seal, a 1"inch unheated section is recommended.
