Yes, Ther­ma­Cote is safe for indoor use and it is third-party cer­ti­fied green to California’s Indoor Air Qual­ity Stan­dards in Class­rooms and Offices (DHS 01350). The VOC level of Ther­ma­Cote is ultra low at 5.3 G/L, which is much friend­lier to your indoor envi­ron­ment than the major­ity of paint/coating prod­ucts on the mar­ket today.