Loctite LOC42540 Surface Curing Threadlocker 20 Gm

Product Description

The LOCTITE LOC42540 is a surface-curing instant adhesive threadlocker formulated to seal and secure threaded metal pipe connections. It fills the voids between mating threads and cures to a hard, durable bond that resists leakage under both low and high pressure conditions. This liquid adhesive seals instantly upon assembly, allowing low-pressure testing to proceed immediately after application. When fully cured, the bond reaches the burst strength of most standard piping systems, making it a reliable choice for permanent thread sealing in metal pipe and fitting assemblies.

This threadlocker is suited for residential and commercial plumbing, HVAC, and industrial piping applications where metal threaded connections must be sealed against fluid or gas leakage. It is applied directly to male threads before assembly and is appropriate for use by licensed plumbers, pipefitters, and HVAC technicians working on metal pipe systems. Each unit contains 20 grams of adhesive, packaged individually.

Key Features

• Surface-curing formulation seals instantly for immediate low-pressure testing
• Rated for both low and high pressure applications
• Cures to the burst strength of most piping systems when fully set
• Liquid consistency fills thread voids completely for a leak-free seal
• 20 gram unit provides multiple applications per container

Compatibility

Designed as an OEM-style thread sealant for use on metal pipe and fitting assemblies in plumbing, HVAC, and industrial piping systems.

Installation Notes

Application is typically performed by a licensed plumber or pipefitter. Shut off fluid or gas supply and depressurize the line before disassembling or reassembling any threaded connection. Apply adhesive to clean, dry threads and assemble immediately. Allow full cure time before pressurizing the system to operating levels.

Technical Specifications

• Net Weight (Product): 20 grams
• Package Weight: 0.073 pounds
• Unit of Measure: Each
• UPC: 0079340425408

Standard Information

• Brand: LOCTITE
• Manufacturer Part Number: LOC42540