Loctite 278 Threadlocker 50ml

Loctite 278 Threadlocker 50ml is a high strength green threadlocking adhesive engineered for maximum efficacy in the permanent locking and sealing of threaded fasteners. This industrial-grade adhesive permanently locks and seals components, preventing costly loosening and leakage caused by shock and vibration. Whether you are securing thru-holes or blind holes, this premium methacrylate-based threadlocking adhesive provides a robust, leak-proof seal on all metals—including less active substrates such as coated or plated surfaces.

Why Choose Loctite 278 High Temperature Resistance?

• Prevents Unwanted Movement: Eliminates loosening, leaks, and corrosion by completely filling voids between close-fitting metal surfaces.
• Broad Metal Compatibility: Provides excellent performance on steel, brass, and stainless steel.
• Oil Tolerant Formula: Can tolerate slight contaminations of industrial oils during the application process.
• Vibration Resistant: Ideal for heavy-duty use cases subject to constant operational shock, impact, and vibration.
• High Temperature Resilience: Maintains a strong, permanent bond in elevated temperature environments and requires localized heat for removal.

Technical Specifications

• Product Type: Methacrylate-based Anaerobic Threadlocking Adhesive
• Strength: High
• Color: Green
• Container Size: 50ml
• Certifications: Tested according to ISO 10964 and ISO 10123; compliant with Loctite Material Specification (LMS).

Simple Application Instructions

1. Clean: For optimal results, clean all internal and external surfaces with a LOCTITE® cleaning solvent and let dry. (Optional: If the metal is inactive or the cure speed is too slow, spray threads with Activator 7471™ or 7649™ and allow to dry).
2. Apply: Apply several drops of the liquid adhesive to the nut engagement area for thru-holes, or down the internal threads for blind holes.
3. Assemble: Assemble and tighten the parts as required. The formula will begin curing once confined in the absence of air between close-fitting metal surfaces (anaerobic conditions).

Frequently Asked Questions (FAQ)

What is Loctite 278 used for?

Loctite 278 is a high strength anaerobic threadlocking adhesive designed for the permanent locking and sealing of threaded fasteners. It is specifically formulated to prevent metal nuts, bolts, and fasteners from loosening or leaking due to intense shock, vibration, and thermal stress.

Can Loctite 278 be disassembled?

No, not with standard hand tools alone. Because this is a permanent, high strength bond, disassembly requires applying localized heat to the nut or bolt to approximately 350 °C and disassembling the components while they are still hot.

Does Loctite 278 work on Stainless Steel?

Yes. Loctite 278 offers robust performance across various metals. It is highly effective on active substrates like steel and brass (with a fixture time of 20 minutes) as well as less active/passive substrates like stainless steel (with a fixture time of 60 minutes).

Is Loctite 278 safe for plastic components?

This product is not normally recommended for use on plastics, particularly thermoplastic materials where stress cracking of the plastic could result. It is strictly engineered for metal-to-metal applications. Additionally, it should not be selected as a sealant for pure oxygen, chlorine, or other strong oxidizing systems.