SERPIB Industrie supplies and installs calfeutrement coupe-feu systems for cable and pipe penetrations — coatings, sealants, rock-wool boards, mortars and seal bags under the KBS name — plus cable fire-retardant treatment, for clients including ArcelorMittal, EDF, BASF, Sanofi and Orange. Its systems are covered by third-party classification reports including MPA BS K-2400/753/18 for the KBS Kombischott, AFITI 7994/09-23 for the KBS Seal Bag and mortar classification KB-210006305 at EI 90 and EI 120, and by FM Approvals. Work follows the French Règles professionnelles 04/03 for penetration and linear-joint sealing.