Technical Data Sheet
Product 577
Worldwide Version, October 1995
PRODUCT DESCRIPTION
LOCTITE
廬
Product 577 is a single component, medium
strength, thixotropic anaerobic sealant with fast curing
properties. The product cures rapidly when confined in the
absence of air between close fitting metal surfaces.
TYPICAL APPLICATIONS
Used to seal metal threaded fittings. Particularly suitable for
use on stainless steel without the need for surface activation.
PROPERTIES OF UNCURED MATERIAL
Typical
Chemical Type
Appearance
Specific Gravity @ 25擄C
Viscosity @ 25擄C, Pa.s (P)
Brookfield RVT
Spindle 5 @ 2.5 rpm
@ 20 rpm
DIN 54453, MV
D = 36 s
-1
after t=180secs
Flash Point (COC),
擄
C
Value
Dimethacrylate
ester
Yellow, fluorescent
1.09
Range
Cure speed vs. temperature
The rate of cure will depend on the ambient temperature. The
graph below shows the breakaway strength developed with
time at different temperatures on M10 steel nuts and bolts and
tested according to ISO 10964.
% of Full Strength on steel
40
擄C
100
C
5擄
50
25
0
5min10min
30min 1hr
3hr
6hr
24hr
72hr
80,000
24,000
6,750
>100
50,000 to 110,000
17,000 to 31,000
4,500 to 9,000
Cure Time, Hours
% of Full Strength on steel
TYPICAL CURING PERFORMANCE
Cure speed vs. substrate
The rate of cure will depend on 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
100
Cure speed vs. activator
Where cure speed is unacceptably long, or large gaps are
present, applying activator to the surface will improve cure
speed. The graph below shows the shear strength developed
with time using ACTIVATOR N and T on M10 Zinc Dichromate
steel nuts and bolts and tested according to
ISO 10964.
100
22
擄C
75
75
No
tN
Ac
tT
Ac
or
at
tiv
Ac
50
Br
as
s
Ste
el
75
Zinc dichromate
25
0
50
Stainless steel
25
0
5min10min
30min 1hr
3hr
6hr
24hr
72hr
5min10min
30min 1hr
3hr
6hr
24hr
72hr
Cure Time, Hours
Cure Time, Hours
TYPICAL PROPERTIES OF CURED MATERIAL
Physical Properties
Coefficient of thermal expansion, ASTM D696, K
-1
Coefficient of thermal conductivity, ASTM C177, W.m
-
1
K
-1
Specific Heat , kJ.kg
-1
K
-1
80 x 10
-6
0.1
0.3
Cure speed vs. bond gap
The rate of cure will depend on the bondline gap. Gaps in
threaded fasteners depend 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.
% of Full Strength on steel
100
0.05mm
75
0.15mm
50
0.25mm
PERFORMANCE OF CURED MATERIAL
(After 24 hr at 22擄C, on steel)
Typical
Breakaway Torque, ISO 10964, N.m
(lb.in)
Prevail Torque, ISO 10964, N.m
(lb.in)
Breakloose Torque, DIN 54454, N.m
(lb.in)
Max. Prevail Torque, DIN 54454, N.m
(lb.in)
Value
11
(97)
6
(53)
17
(150)
17
(150)
Range
6 to 15
(53 to 133)
2.5 to 9
(22 to 80)
9 to 25
(80 to 221)
9 to 25
(80 to 221)
25
0
5min10min
30min 1hr
3hr
6hr
24hr
72hr
Cure Time, Hours
NOT FOR PRODUCT SPECIFICATIONS
THE TECHNICAL DATA CONTAINED HEREIN ARE INTENDED AS REFERENCE ONLY.
PLEASE CONTACT LOCTITE CORPORATION QUALITY DEPARTMENT FOR ASSISTANCE AND RECOMMENDATIONS ON SPECIFICATIONS FOR THIS PRODUCT.
ROCKY HILL, CT FAX: +1 (860)-571-5473
DUBLIN, IRELAND FAX: +353-(1)-451 - 9959
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