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Würth

Würth Medium-Strength Threadlocker

Würth Medium-Strength Threadlocker

Key Features

  • Removable screw retainer and sealing compound - secure fasteners while still allowing disassembly with normal tools.
  • Provides medium-strength bonding, preventing loosening from vibration and shock loads.
  • Universal application on metals, including stainless steel and passivated surfaces.
  • No accelerator or activator required - cures in contact with metal in the absence of oxygen.
  • High resistance to solvents, oils, fuels, gases, and other aggressive media.
  • Excellent thermal stability, withstanding -55°C to 150°C.
  • Silicone-, solvent-, and oil-free formulation for clean, reliable application.
  • DOS dispensing system: one-handed operation, adjustable flow, and virtually zero product waste.

 

Size

24 in stock

£25.99 GBP
£25.99 GBP
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Description

Reliable Medium-Strength Thread Retention

Würth Medium-Strength Threadlocker is a dimethacrylic ester-based anaerobic adhesive designed to lock and seal threaded fasteners against vibration, shock, and thermal cycling. Unlike mechanical retainers, it prevents loosening without causing unwanted locking problems, and connections can still be undone using normal tools.

High Performance Across Industries

Suitable for use in automotive, commercial vehicle, shipbuilding, mechanical engineering, tool manufacturing, metalworking, and electrical applications, it is the ideal solution for securing screws, bolts, nuts, and plugs where medium-strength locking is required.

Durable and Resistant

The threadlocker provides excellent resistance to a wide range of fuels, oils, gases, and solvents while maintaining bond strength in demanding conditions. Once cured, it withstands continuous temperatures from –55 °C to +150 °C.

Efficient DOS System

With Würth’s DOS one-handed dispensing system, users benefit from precise, adjustable dosing, a clean application with no residue in the nozzle, and virtually complete emptying of the container. This reduces waste and makes the product highly cost-effective.

Safe Application on Metals

The formulation cures rapidly when in contact with metals in the absence of oxygen, achieving initial strength within 5–15 minutes and full curing in 1–3 hours. It is especially suited to copper and iron-containing substrates.

Technical Information

Specifications

Chemical Basis: Dimethacrylic acid ester

Colour: Blue fluorescent

Density: 1.12 g/cm³ (DIN EN ISO 2811-1)

Viscosity 1: 4000–9000 mPas at 25 °C (Brookfield RVT, spindle 3/2.5 rpm)

Viscosity 2: 1500–3000 mPas at 25 °C (Brookfield RVT, spindle 3/20 rpm)

Suitable For Threads Up To: M36

Gap-Filling Ability: Max. 0.25 mm

Initial Strength: 5–15 min

Functional Strength: 0.5–1 h

Final Strength: 1–3 h

Compressive Shear Strength: 10–20 N/mm² (ISO 10123)

Breakaway Torque: 15–25 Nm (DIN EN 15865)

Prevail Torque: 3–8 Nm (DIN EN 15865)

Processing Temperature: +5 °C to +35 °C

Temperature Resistance (Cured): –55 °C to +150 °C

Flash Point: Min. 100 °C

Shelf Life: 18 months (at room temperature)

Weight of Content: 25 g

Silicone-Free: Yes

Solvent-Free: Yes

Fully Curing Conditions: Exclusion of oxygen and contact with metal (copper or iron ions)

Documents

Application Instructions

  1. Ensure all threads are dry, clean, dust-free, and grease-free.
  2. Apply a sufficient amount of threadlocker to the adhesive surfaces.
  3. Assemble components immediately after application.
  4. Allow the adhesive to cure.

Safety and Usage Notes

  • Not recommended for prolonged contact with certain plastics (e.g. ABS, polycarbonate, PMMA, SAN, and painted surfaces).
  • Operating temperature range: -55°C to 150°C.
  • Store at room temperature; shelf life is 18 months.
  • Always wear protective gloves and eyewear during use.
  • Avoid direct contact with skin and eyes.