LOCTITE 586 High-Strength Slow-Curing Thread Sealant for Copper and Brass Fittings

LOCTITE 586 Thread Sealant Benefits

LOCTITE 586 Thread Sealant combines strong joint retention with dependable sealing against water, oil, and many common organic materials. The cured material helps prevent leakage and vibration-related loosening while avoiding the shredding, creep, or shrinkage associated with some traditional sealing methods. Its one-component format requires no mixing, helping maintenance teams and production operators reduce preparation time, ratio errors, and material waste.

The red liquid fluoresces under ultraviolet light, allowing quality-control teams to verify application coverage during manufacturing. Properly tightened fittings provide an immediate seal against moderate pressure, while a minimum 24-hour cure is recommended when maximum pressure and solvent resistance are required.

Applications for LOCTITE 586 Thread Sealant

This high-strength product is intended for metal pipe threads and fittings used in industrial manufacturing, maintenance, fluid handling, pumps, process equipment, and machinery. It is particularly well suited to copper and brass fittings because its slower cure gives operators sufficient time to align, engage, and wrench-tighten the connection before the adhesive develops excessive strength.

The sealant can also be evaluated on steel, stainless steel, zinc-plated metal, and other compatible metallic substrates. It is designed for close-fitting threaded joints rather than flexible gaps or plastic piping. Henkel does not normally recommend the product for thermoplastics because stress cracking may occur, so substrate compatibility should be confirmed before production use.

LOCTITE 586 Thread Sealant Technical Performance

The uncured product is based on dimethacrylate ester acrylic technology and has a typical specific gravity of 1.12 at 25°C. Published viscosity is approximately 4,000 to 6,000 mPa·s, providing enough body for controlled application while allowing the liquid to wet thread surfaces effectively. After 24 hours at 22°C, Henkel reports breakaway torque of at least 15 N·m on M10 black-oxide steel fasteners and compressive shear strength of approximately 10 to 25 N/mm² on steel pins and collars.

These figures are typical laboratory values rather than guaranteed purchase specifications. Cure speed and final performance depend on metal activity, thread geometry, joint clearance, temperature, surface cleanliness, adhesive quantity, and activator use.

How to Apply LOCTITE 586 Thread Sealant

Clean internal and external threads with a compatible LOCTITE cleaning solvent and allow them to dry. Apply LOCTITE SF 7471 or SF 7649 Activator when the metal is inactive, the gap is large, or faster curing is required. Dispense a continuous 360-degree bead around the leading male threads while leaving the first thread free. Work the material into the thread profile, apply additional product to female threads when necessary, then assemble and tighten according to equipment-manufacturer instructions.

Why Buy LOCTITE 586 Thread Sealant?

LOCTITE 586 Thread Sealant offers high-strength retention, slow controlled curing, strong pressure sealing, vibration resistance, UV inspection, and specialized performance on copper and brass fittings. It is a practical industrial choice for buyers seeking a durable alternative to tapes and conventional pipe-sealing compounds. Review the official Henkel LOCTITE 586 Technical Data Sheet and Safety Data Sheet before qualification, storage, or use.

Store unopened containers in a dry location between 8°C and 21°C for optimum product stability. Explore our industrial thread sealants for additional solutions for hydraulic, pneumatic, chemical-processing, and general metal pipe systems.