Datasheet

Technical Data Sheet
LOCTITE
®
577™
(TDS for the new formulation of LOCTITE
®
577™) August-2016
PRODUCT DESCRIPTION
LOCTITE
®
577™ provides the following product
characteristics:
Technology Acrylic
Chemical Type Dimethacrylate ester
Appearance (uncured) Yellow paste
LMS
Fluorescence Positive under UV light
LMS
Components One component -
requires no mixing
Viscosity High, thixotropic
Cure Anaerobic
Secondary Cure Activator
Application Thread sealing
Strength Medium
This Technical Data Sheet is valid for LOCTITE
®
577™
manufactured from the dates outlined in the
"Manufacturing Date Reference" section
LOCTITE
®
577™ is designed for the locking and sealing of
metal threaded pipes and fittings. Particularly suitable for use
on stainless steel without the need for surface activation. The
product cures when confined in the absence of air between
close fitting metal surfaces and prevents loosening and
leakage from shock and vibration. The thixotropic nature of
LOCTITE
®
577™ reduces the migration of liquid product after
application to the substrate. LOCTITE
®
577™ provides robust
curing performance. It not only works on active metals (e.g.
brass, copper) but also on passive substrates such as stainless
steel and plated surfaces. The product offers gap performance
to 0.25 mm (0.01 in), high temperature performance and
contamination tolerance. It cures in the presence of minor
surface contaminations from various oils, such as cutting,
lubrication, anti-corrosion and protection fluids and cleaners
containing surfactants and corrosion inhibitors.
NSF International
Registered to NSF Category P1 for use as a sealant where
there is no possibilty of food contact in and around food
processing areas. Note: This is a regional approval. Please
contact your local Technical Service Center for more
information and clarification.
Approved by the Australian Gas Association Certificate
number 4787 Class III rated working pressure 2000 kPa,
working temperature -10 to 135°C. Note: This is a regional
approval. Please contact your local Technical Service Center
for more information and clarification.
EN 751-1
Sealing materials for metallic threaded joints in contact
with 1st, 2nd, and 3rd family gases and hot water; Part 1:
Anaerobic jointing compounds. LOCTITE
®
577™ has been
tested and conforms to EN 751-1 for a class H compound and
carries the DVGW certification.
TYPICAL PROPERTIES OF UNCURED MATERIAL
Specific Gravity @ 25 °C 1.1
Viscosity, Brookfield - RVT, 25 °C, mPa·s (cP):
Spindle 6, speed 2.5 rpm 70,000 to 130,000
LMS
Spindle 6, speed 20 rpm 16,000 to 33,000
LMS
Flash Point - See SDS
TYPICAL CURING PERFORMANCE
Cure Speed vs. Substrate
The rate of cure will depend on the substrate used. The graph
below shows the breakaway strength developed with time on
M10 steel nuts and bolts compared to different materials and
tested according to ISO 10964.
% of Full Strength on Steel
Cure Time
100
75
50
25
0
1min 5min 30min 1h 3h 6h 24h 72h 168h
Steel
Brass
Stainless steel
Zinc dichromate
Cure Speed vs. Bond Gap
The rate of cure will depend on the bondline gap. Gaps in
threaded fasteners depends on thread type, quality and size.
The following graph shows shear strength developed with time
on steel pins and collars at different controlled gaps and tested
according to ISO 10123.