
Loctite PST Thread Sealant Stick Off-White 19G
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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.
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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).
