Carboline is a St Louis manufacturer of protective coatings, linings and fireproofing materials. Its passive fire protection range covers cementitious and epoxy intumescent fireproofing for structural steel in commercial and hydrocarbon-processing settings. The company states that it is certified to ISO 9001:2015 and lists UL and Factory Mutual among its product certifications, along with a quality programme satisfying 10CFR50 Appendix B and ASME NQA-1. It has operated from St Louis since 1947.