Datasheet

Manufactured by :
CRC Industries Europe BVBA
Touwslagerstraat 1 – 9240 Zele – Belgium
Tel (32) (0) 52/45.60.11 Fax (32) (0) 52/45.00.34
www.crcind.com
TECHNICAL DATA
1/3
CRC EXTRA LOCK
(Permanent)
Ref. : 10767
1. GENERAL DESCRIPTION
A thread locker and bearing retainer, developed to carry high shear forces to permanently
lock threaded connections and to fix bearings. Anaerobic adhesive based on methacrylate
esters.
As permanent are considered: those connections that do not become loose, by the
interaction of thermal expansion or vibration. At the other hand, threaded connections can
not be easy dismounted without damaging the connection or parts, while bearings will be
safe for axial and tangential movements.
2. FEATURES
A permanent high torque and shear tension.
Thixotropy and moderate viscosity provide the adhesive with a good filling capacity.
Suitable for threaded connections from M5 till M16.
Suitable for fixing of bearings and axes.
Great resistance to: temperature, corrosion, vibrations, water, gas, oils, hydrocarbons
and most chemicals.
Difficult or not possible to dismount with normal tools.
Does not run or drip off.
Does not migrate after assembly.
3. APPLICATIONS
Adhesive specially recommended for:
Locking and sealing metallic threaded screws and bolts that have no need to be
removed. The resulting structural joint is resistant to vibrations and eliminates the need to
use other mechanic fastening elements.
Retaining of bearings and axes when the applied tolerances are not intended to or not
sufficient to make a firm connection.
Those connections where a high and steady break loose and prevailing torque is desired.
In constructions where component disassembly cannot be tolerated.
4. DIRECTIONS
Best results are obtained on clean, dry and grease free surfaces. Clean with CRC industrial
Degreaser for best results.
In general, roughened surfaces give higher bond strengths than polished or ground surfaces.
Apply a bead of CRC Extra Lock on the last thread of the nut or bolt / screw, or cover the entire
circumference of the ax or bearing. Assemble and apply the needed pre-torque when
applicable. Depending on the nature of the metals and the ambient conditions, parts can be
handled 15 minutes later without affecting the curing of the adhesive.

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