The RAL Quality Mark (Gütezeichen) of GSK

The RAL Quality Mark (Gütezeichen) of GSK provides greater assurance for all those who think ahead. The RAL Quality Mark RAL-GZ 662 guarantees a tested, flawless standard of coating, ensuring a future-proof solution for mains supply networks of drinking water, waste water and gas. It is only awarded to manufacturers who satisfy the strenuous requirements of the GSK Quality and Inspection Regulations’ extensive quality assurance.

More on the RAL Quality Mark of GSK

Quality Assurance Association

The Quality Assurance Association for Heavy-Duty Corrosion Protection (GSK) is the global industry network of companies operating drinking water, waste water and gas supply networks.

About GSK

Members with Quality Marks

Here you can find the manufacturers, products and coating materials worldwide that carry the RAL Quality Mark (Gütezeichen) of GSK, thus guaranteeing the highest standards.

Members with Quality Marks


When the highest standards of the RAL Quality Mark (Gütezeichen) of GSK are required of you, become a member and fulfil the requirements to carry the RAL Quality Mark (Gütezeichen) of GSK.


Epoxy technology

The technology of epoxy powder coating is an advanced coating procedure with tradition. It is employed when functional reliability, maximum adhesion, operating experience and durability are of paramount importance.

Further info on epoxy technology

RAL Quality Mark (Gütezeichen) of GSK
on video

A short video by GSK about its RAL Quality Mark



Our GSK secretariat will be pleased to answer all your enquiries.

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