About us


PRELOK GmbH is a medium-sized company with headquarters in Cologne. Since the foundation in 1983, PRELOK GmbH has been involved with the pre-coating of threaded components of all types. With more than 30 years of experience, we are one of the leading providers of threadlocking and sealing pre- coatings in Germany and Europe. We are provided with expertise which ensures that we are also in a position to solve the most difficult application challenges. Furthermore, we are very well networked in the various sectors and businesses.

Thanks to our flexible and very high-tech production, we can offer a rapid and consistent service which fulfills the high-quality demands of our customers. Our product range extends from the coating of very small parts for the electronical industry, through to M30 bolts for bridge- building or the renewable energy sector.

Our committed team of specialists will be glad to provide you with our best support.

Prelok GmbH Köln Schrauben

Why use a pre-applied threadlocking and sealing application?


A threadlocking is necessary in order to secure a screwed connection against unintentional loosening. Furthermore, a threadlocking application can also provide sealing for gases and liquids.