Loctite 262 High-Strength Red Threadlocker 1.69 fl. oz. - Heavy Duty

In this review the Loctite 262 high-strength red threadlocker is evaluated for mechanics, fabricators and home DIYers who need a permanent lock on threaded fasteners. The bottom line is that this anaerobic liquid is built for heavy-duty applications where vibration and heat are factors, and it cures to a hard, permanent bond that is removable only with heat and tools. For anyone fastening studs, bolts or assemblies up to 3/4 in in diameter this product offers a reliable, high-temperature resistant solution that stays put once cured.

Key Features

• High-strength bond: Designed to lock and seal threaded fasteners so assemblies resist loosening under vibration and heavy loads.
• Wide temperature range: Performs from -65 Degrees to 300 Degrees F, making it suitable for engine bays and hot industrial components.
• Anaerobic chemistry: Cures in the absence of air for secure, gap-filling bonds up to 0.005 in that set fully in 24 hours.
• Practical container size: Supplied in a 1.69 fl. oz. (50 mL) bottle that is easy to store and apply for occasional or professional use.
• Serviceable removal: Provides a permanent hold in service but can be undone when necessary using heat and hand tools.

Who It's For

This product suits automotive technicians, maintenance personnel and serious DIYers who need a dependable threadlocking solution for studs, bolts and assemblies up to 3/4 in diameter. It is particularly appropriate when components will see high temperatures or sustained vibration and a permanent, tamper-resistant hold is required.

Those who need frequent disassembly or a removable-grade product for delicate electronics should look for a medium-strength or removable threadlocker instead. Also, if precise gap control beyond 0.005 in is required, verify fit before committing to this high-strength formula.

Pros & Cons

Pros

• Very strong locking performance suitable for high-vibration and high-temperature service.
• Wide performance range from -65 Degrees to 300 Degrees F allows use in harsh environments.
• Compact 50 mL bottle is convenient for shop storage and controlled application.

Cons

• High-strength formulation makes routine disassembly difficult without applying heat and tools.

Specifications

Brand	Loctite
Series	262
Container size	1.69 fl. oz. (50 mL)
For fastener diameter	Up to 3/4 in
Full cure time	24 hr
Performance temperature	-65 Degrees to 300 Degrees F
Viscosity	1800 to 5000 cP

Our Verdict

The Loctite 262 red high-strength threadlocker is a solid choice for professionals and serious hobbyists who need a near-permanent lock on bolts and studs exposed to heat and vibration. Given its anaerobic chemistry, gap fill capability and temperature tolerance, it represents good value when a durable, tamper-resistant bond is required, provided the user accepts that removal requires heat and tools.

Frequently Asked Questions

How long before the bond reaches full strength?
Full cure is listed as 24 hr, though handling strength develops earlier depending on gap and temperature.

Can this be removed if needed?
Yes, removal is possible but requires heat and mechanical tools since this is a high-strength formula.

What size fasteners can it be used on?
It is suitable for threaded fasteners up to 3/4 in in diameter.