Loctite 577 Medium Strength Thread Sealant 50ml

Loctite 577 Thread Sealant Medium-strength, general purp

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Loctite® 577 Thread Sealant is a medium-strength, general purpose thread sealant for straight/straight and taper/straight threads and fittings. Great for overhead applications and fast application at low temperatures. Excellent chemical and thermal resistance; gel-like form results in less migration of product after application.

LOCTITE 577 is designed for the locking and sealing of metal pipes and fittings as well as other threaded assemblies. The product provides an instant, low-pressure seal for metal pipes and fittings. It will not creep, shrink or shred. Suitable for fast application at low temperatures. Cures on lightly contaminated surfaces and does not require a primer on inactive metals. It has excellent chemical and thermal resistance and offers less migration of liquid product after application to the part.


• General purpose, medium strength liquid thread sealant for sealing metal threads
• Suitable for all metal types
• Instant low pressure seal
• Excellent chemical resistance
• Locks connection against vibration-induced loosening and other stresses
• Easy to apply
• Cures on active and inactive metals




Product Type

Thread Sealant

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Product Variants

SKU Model# / BarcodeSizePrice Availability
A0049864 577-250ML-LOC
250ml $135.86 Available
A0049887 577-50ML-LOC
50ml $27.50 Available