About us
The RAL-Gütegemeinschaft Kunststoff-Fensterprofilsysteme e.V. (GKFP) – quality alliance for plastics window profile systems reg. 
assoc. provides a neutral 3rd-party quality control and certification for their member companies. The RAL-quality certification is voluntary and may be acquired by any manufacturer meeting the requirements set down in our quality- and testing regulations. It is the target to comply with highest product quality to assure enduring usability. Products certified by GKFP are awarded the RAL-quality mark for plastics window profile systems .
A component for profile systems can be certified and may be used in certified plastics window profile systems.
Since 30 years the quality mark has been granted by the quality alliance to products which quality accedes the minimum quality level of the national and international standards.
Members of GKFP are profile manufacturers at first (regular members), but also manufacturers of seals for windows, raw materials, foils, adhesive-systems and laminating companies (supporting members). Find a list of all member companies.
Our quality- and testing regulations are developed by our members and are approved by RAL. The conformity of the products according to these regulations is regularly audited by an independent accredited testing institute and certified by the quality alliance GKFP.
Office of Gütegemeinschaft Kunststoff-Fensterprofilsysteme .e.V. (GKFP)
Am Hofgarten 1-2
53113 Bonn,
Tel. +49 (0) 228 766 76 54
Fax +49 (0) 228 766 76 50