Supex 243 Thread Locking Adhesive

Thread locking adhesive, commonly referred to as threadlocker, is a specialized adhesive used to prevent threaded fasteners—like screws, bolts, and nuts—from loosening due to vibration, shock, or thermal expansion. Widely used across automotive, industrial, aerospace, and DIY applications, threadlocking adhesives play a crucial role in ensuring mechanical reliability and safety.

Why Use Thread Locking Adhesive?

Fasteners in machinery, engines, or other equipment are often subject to movement, vibration, and thermal cycling. Over time, this can cause them to loosen, potentially leading to leaks, component failure, or safety hazards. Thread locking adhesives offer several benefits:

• Prevents loosening from vibration or shock

• Seals threads to prevent corrosion and leaks

• Increases the lifespan of mechanical assemblies

• Eliminates the need for lock washers or mechanical locking devices

Types of Thread Locking Adhesives

Threadlockers come in various formulations to suit different applications. The main types include:

1. Removable (Medium Strength)

• Color: Blue (e.g., Supex 243)

• Use Case: Ideal for fasteners that may need to be removed with hand tools for maintenance or repairs.

• Applications: Automotive parts, machinery, electronics.

2. Permanent (High Strength)

• Color: Red (e.g., Supex 271)

• Use Case: For fasteners that are not intended to be removed or require heat for disassembly.

• Applications: Heavy-duty industrial equipment, engine bolts.

3. Low Strength

• Color: Purple

• Use Case: Designed for small screws or delicate assemblies like electronics.

• Applications: Eyeglasses, circuit boards, and small appliances.

How to Apply Threadlocker

Applying thread locking adhesive is simple but must be done properly for best results:

1. Clean the Threads: Remove oil, dirt, and old adhesive from threads using a degreaser or solvent.

2. Apply Adhesive: Place a few drops on the bolt threads or inside the nut. Only a small amount is needed.

3. Assemble Fastener: Tighten the fastener as usual.

4. Cure Time: Allow the adhesive to cure. Most threadlockers set in 10–20 minutes and fully cure in 24 hours.

Tip: For high-temperature or high-pressure environments, choose a product rated for extreme conditions.

Choosing the Right Thread Locking Adhesive

 Consider the following while selecting a thread locking adhesive

• Strength Required: Removable or permanent?

• Temperature Resistance: Some formulations withstand up to 650°F (343°C).

• Size of Fastener: Larger fasteners may need stronger adhesives.

• Environmental Exposure: Water, oil, chemicals, etc.

Conclusion

Thread locking adhesives are an essential component in ensuring the long-term performance and safety of mechanical assemblies. Whether you’re repairing a vehicle, maintaining industrial equipment, or assembling electronics, using the right threadlocker can save time, money, and potential failure down the line.

Looking for the best threadlocker for your application? Check out our selection of industrial-grade adhesives, available in various strengths and sizes.