Threadlockers
Low, medium and high strength anaerobic threadlockers in different viscosities, wicking grade types and tamper-proof seal lacquers.
A bolt that loosens under vibration is the cheapest yet most dangerous failure on a machine; a liquid threadlocker does what a washer and a lock nut cannot. We select the right strength grade for the bolt size, the need for disassembly and the temperature. We ship threadlockers from stock across Türkiye and abroad, and also sell them through hidroticaret.com, our online store (Turkish).
Types
Low strength threadlockers
Small screws and joints that are disassembled often; easily removed with standard tools.
Medium strength threadlockers
General purpose; holds under vibration and can be removed with standard tools.
High strength threadlockers
Permanent joints; heating may be required for removal.
Wicking grade threadlockers
Very low viscosity; penetrates the threads of an already assembled bolt.
Tamper-proof seal lacquers
Fast drying lacquer that marks a tightened joint and reveals tampering.
How to select
Threadlockers are (anaerobic) liquids that cure in the absence of air and in contact with metal: they fill the thread gap and prevent loosening by vibration and corrosion in the thread. Selection is by strength grade: low for small screws that will be removed later, medium for general use, high for permanent joints.
Viscosity is selected according to bolt size: low for fine threads, high for large and coarse threads. Wicking grade types are applied to a joint that has already been tightened. The table below lists the products in stock by strength.
Before application the thread is degreased; on an oily thread the threadlocker does not cure fully. Cure slows down on passive surfaces such as stainless steel and plated parts; a suitable product or an activator is selected for these surfaces.
Threadlocker comparison
| Product | Viscosity | Strength | Removal |
|---|---|---|---|
| AN 301-43 | Low | Low | Easy removal |
| AN 302-22 | Medium | Low | Easy removal |
| AN 302-40 | Medium | Medium | Removable with standard tools |
| AN 302-41 | Low | Medium | Easy removal |
| AN 302-42 | Medium | Medium | Removable with standard tools |
| AN 302-43 | High | Medium | Removable with standard tools |
| AN 302-44 | High | Medium | Removable with standard tools |
| AN 302-50 | Medium | High | Hard to remove |
| AN 302-60 | Medium | High | Hard to remove |
| AN 302-62 | High | High | Hard to remove |
| AN 302-70 | Medium | High | Hard to remove |
| AN 302-71 | Medium | High | Hard to remove |
| AN 302-72 | High | High | Hard to remove |
| AN 302-90 | Very low (wicking) | High | Hard to remove |
Product codes and properties are from the manufacturer's (Weicon) product descriptions. For temperature resistance and cure time, see the product's technical data sheet.
Frequently asked questions
Which threadlocker strength should I choose?
Low strength for small screws and those to be removed later, medium for general machine joints, high for joints that should not come apart.
How do I remove a bolt fixed with high strength threadlocker?
The joint is heated to soften the threadlocker and then undone.
Why did the threadlocker not cure?
The thread may have been left oily or the surface may be passive (stainless, plated). The thread should be cleaned and a suitable product used on passive surfaces.
Can threadlocker be applied to an already tightened bolt?
Yes, with wicking grade, very low viscosity types; the threadlocker penetrates the thread afterwards.
Can threadlocker be used instead of a lock washer?
Against loosening by vibration, a threadlocker is more effective than a spring washer and a lock nut; the two can also be used together where the joint design requires it.
Stock, sizes and part numbers
We select and supply the products in this group according to the application. Send us your requirement, the size and the operating conditions on WhatsApp and we will recommend the right product.