All raw materials used for FIRAT products are subject to entrance quality control tests. No-lead raw materials are also used for production of PVC door and window profiles. Thanks to our modern production line, the raw materials used for production of PVC profiles are transferred to profile without any contact with air. All raw materials and rate formulations used for PVC window profiles are regularly tested by international independent laboratories and our own laboratories. Mixture of raw material used for PVC window profiles are certified by the German RAL quality association.

The seals, which are one of the most significant components for heating and acoustic insulation on PVC window systems and manufactured at our own plants, are made of EPDM (Ethylene Propylene Diene Monomer) as raw material. EPDM seal is the single one that assure sealing in the longest time in the most quality manner and it can be used without any problem for long years as it has very high irreversible deformation rate.

For these reasons, FIRAT uses only black EPDM seal on PVC window and door systems.