Large range of solutions for thread locking,
sealing on threaded or smooth parts, reusable
locking thanks to Tuflok ®. Our know-how complies
with the upmost requirements


Reusable, resistant to shocks and vibrations,
adjustable patch at 180° or 360°. Perfect to
replace other expensive locking systems:
nuts, washers, pins, …


Obtained immediatly thanks to a resin applied on
one part. Sealing products can withstand to high
temperatures and pressures, effective for lots of fluids.


Our Pre-coating products are effective for a large range
of applications to lock threaded parts, prevent against
vibrations, secure assemblies … the 100% quality
locking solution !


Eliminate galling during assembly and in use at high
temperature and under high pressures. Easy assembly
and disassembly

Specialist for the best locking and sealing solutions


Prelok is the specialist for the coating of thread locking and sealing applications and also for anti-corrosion properties as well as anti-seizing solutions.
Prelok is the leading company for coating in France with more than 100 Millions of parts coated every year.
Prelok has strengthened a partnership with the most important manufacturers of products such as Precote – 3M ScotchGrip – Tuflok to enable to answer to all coating requests.
Our special machines can coat a wide range of parts, from small to big volumes.
Most of our machines are equipped with cameras to control the patch at 100%.
We are full equipped to provide the coated parts packed in parcels as per customer’s request.

Our quality organization is certified ISO 9001 2008 version and we fulfill the TS16949 requirements of the automotive industry. Prelok is TIER ONE for PSA.

QAS 9001 Logo

Photo batiment Prelok

Group specialized in global assembly solutions

Soprima, Inserco, Prelok and Foubert are joining together to form the LINKSY group, Linking Systems.
The group’s offer is organized around assembly solutions thanks to the know-how of each company :

– Inserco & Foubert for fasteners and parts on drawing.

– Soprima & Prelok for pre-coating.

By combining our activities under one banner, we communicate on the group’s overall strategy : developing complete assembly systems with and for you.



Video presentation group Linksy


Find all our documentation here.

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Prelok – Pre-coating solutions for thread locking, anti-seizing, sealing of smooth and threaded parts and re-usable locking thanks to Tuflok®..
Our special machines can coat a wide range of parts, from small to big volumes : screws, nuts, studs, plugs, tubes, …for a wide range of applications : automotive, aeronautics, electronics, sports & leasures, ….
Our quality organization is certified ISO 9001 and our products fulfill a lot of quality requirements.
To provide the right answer to a lot of application, Prelok has developped partnerships with a lot of manufacturers : Omnitechnik (Precote) – 3M – Nylok (Tuflok), ThreeBond, Mac Dermid.

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