Loctite PST Thread Sealant Stick Off-White 19G
Loctite

Loctite PST Thread Sealant Stick Off-White 19G

Part number561Item numberCB-GDT-123HS code3506.10
MaterialMethacrylate ester (anaerobic)
MOQ:1

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Product Description

Loctite 561 PST is a one-component anaerobic thread sealant supplied as a wax-like semi-solid in a self-feeding applicator stick. It is designed for the locking and sealing of pre-torqued metal pipes and fittings where a conventional liquid or paste product would be difficult to use. The product cures when confined in the absence of air between close-fitting metal surfaces and prevents loosening and leakage from shock and vibration. It develops a controlled low strength to facilitate later disassembly, and fluoresces under UV light for coverage inspection.

Technical Specifications

Technology acrylic; chemical type methacrylate ester; appearance uncured off-white, wax consistency; form stick; positive fluorescence under UV light; one component, requires no mixing; cure anaerobic; application thread sealing; strength low. Self-feeding stick allows direct application to threads with no drip; develops controlled low strength to facilitate disassembly. Typical uncured properties
specific gravity @ 25 degC 1.14; unworked penetration ISO 2137 80 to 140 (1/10 mm); melting point greater than 80 degC. Cured strength developed in the absence of air between close-fitting metal surfaces; breakloose torque tested to ASTM D 6396 on 3/8 in malleable iron pipe tees and steel plugs pre-torqued to 27 N.m. NSF International certified to ANSI/NSF Standard 61 for use in commercial and residential potable-water systems not exceeding 82 degC. For maximum pressure and solvent resistance allow at least 24 hours to fully cure before pressurising the system. PDF file (TDS) attached. 19 g stick.
Type
Thread Sealant
Color
White
Fill size
19 g
Chemical base
methacrylate ester
Cure
Anaerobic (one-component)
Standards
ISO 2137

Standards & Compliance

Material
Methacrylate ester (anaerobic)
HS Code
3506.10

Compatibility & Fitment

Semi-solid PST stick -- no drip, suited to overhead/vertical pipe threads. Low strength for serviceable joints; for medium-strength fine fittings use 542, for high-temp stainless pipe use 567.

Not sure if it fits? Email sales@cballast.com with your equipment serial number or photos — we confirm fit before you order.

Product Documentation

Document preview: Product documentation

Catalogue entry last verified: 2026-08-20. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.

Frequently asked questions

Where can I buy 561?
561 can be ordered from cballast.com as a Loctite catalogue item: request a quotation on this page or email sales@cballast.com, and the order ships worldwide.
What is the manufacturer part number for this Loctite product?
The manufacturer part number is 561.
What is the HS code for 561?
The customs tariff (HS) code for 561 is 3506.10.
Who manufactures 561?
561 is a Loctite product in the Tools & Workshop Consumables range.
Is a datasheet available for 561?
Yes — the 561 datasheet can be viewed and downloaded on this page.
What is the minimum order quantity for 561?
The minimum order quantity is 1.
Is 561 available?
Yes — 561 is available to order: fulfilment is from supplier stock in cBallast's European network, dispatched directly from the warehouse to the customer, with the exact lead time stated in the quotation (reply within 24 hours).