FM approved, these heat sheets are safe for use in areas with infrequent exposure, such as from a spill or a ventilation system failure, to flammable gases, liquids, and dust. They are flexible and permanently adhere to container surfaces to warm contents without direct contact. All have a watt density of 2.5 W/sq. in. for gentle warming. Heaters require a temperature switch or controller to regulate heat output and should be installed with Dow Corning 736 silicone sealant (both not included).

Note: Do not cut, crease, or overlap these heaters—this will damage the heating element. Use a roller during installation to remove air pockets and ensure direct surface contact. Once heaters have been applied to a surface, they cannot be removed and reused.

Hazardous location environmental ratings indicate whether manufacturers have included safety features in products to facilitate their safe use in a hazardous environment. Before selecting a product for a hazardous location, ensure it is rated for your environment. See About Hazardous Location Environmental Ratings.