We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Off-white paste in a 1.7 fl oz tube, Loctite 565 thread sealant

Loctite

Loctite 88551 565 Pipe Thread Sealant 1.7 fl oz Off-White Paste

SKU CH-JB84-FP90J

Anaerobic pipe thread sealant cures between metal threads to seal general-purpose connections up to 2 in. diameter, withstanding -65 °F to 300 °F and 10,000 psi liquid pressure while meeting

  • Anaerobic cure seals threads without air exposure
  • Withstands -65 °F to 300 °F operating range
  • Handles liquid pressure up to 10,000 psi
  • Certified to ANSI/NSF 61 and UL/ULC standards
  • Suits steel threads up to 2 in. diameter

Anaerobic pipe thread sealant

Loctite 88551 565 is an anaerobic pipe thread sealant supplied in a 1.7 fl oz tube. It cures in the absence of air to form a durable off-white paste seal on metal threads. The formulation meets ANSI/NSF Standard 61 and carries UL and ULC listings for potable water contact.

Suits general-purpose metal pipe sealing

This sealant is designed for steel threads up to 2 in. diameter carrying butane, fuels, natural gas or petroleum oil. It withstands temperatures from -65 to 300 Degrees F and liquid pressures up to 10,000 psi. It is not intended for plastic piping, oxygen service or non-threaded joint designs.

Easy tube application on clean threads

Apply the paste directly to clean, dry male threads and assemble the joint. Anaerobic cure begins once the fitting is tightened and air is excluded. Common issues include incomplete cure on inactive metals without primer and leakage if threads are contaminated or damaged.

Highlights

  • Anaerobic cure seals threads without air exposure
  • Withstands -65 °F to 300 °F operating range
  • Handles liquid pressure up to 10,000 psi
  • Certified to ANSI/NSF 61 and UL/ULC standards
  • Suits steel threads up to 2 in. diameter

Specifications

BrandLOCTITE

Questions about this item

What thread diameter can the 565 sealant handle on my steel pipes?

The 565 series seals steel threads up to 2 in. diameter. It is designed for general purpose thread sealing on steel components.

Will the anaerobic cure still work if I apply it to older, slightly oily fittings?

Anaerobic cure requires active metal surfaces and absence of air. Heavy oil residue can inhibit curing; clean threads thoroughly with a solvent wipe before applying the paste.

How do I confirm the 565 sealant has cured properly after assembly?

Proper cure is confirmed when the off-white paste hardens into a solid thermoset plastic that resists 10,000 psi liquid pressure and holds from -65 to 300 °F without leaking.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.