11-02 Eco-Perm Coating is a water based, fire-resistant coating for use indoors over thermal insulation. It is used to adhere and size canvas, glass cloth and other fabric coverings used with thermal insulation. 11-02 Eco-Perm Coating forms a durable white finish that resists yellowing and discoloration. 11-02 Eco-Perm Coating is also available in black and is designed for edge coating duct liner insulation “duct butter” and liner surface protection.