Datasheet

TDS LOCTITE
®
248™, January-2009
Cure Speed vs. Activator
Where cure speed is unacceptably long due to large gaps,
applying activator to the surface may improve cure speed.
However, this can reduce ultimate strength of the bond and
therefore testing is recommended to confirm effect. The graph
below shows the breakloose strength developed with time
using Activator 7471™ and 7649™ on 3/8 x 16 zinc dichromate
nuts and bolts and tested according to ISO 10964. All samples
pre-torqued to 5 N·m. Product applied to bolts, activator to
nuts.
% of Full Strength on Steel
Cure Time
125
100
75
50
25
0
5min 10min 30min 1h 3h 6h 24h
Activator 7649™
Activator 7471™
No activator
TYPICAL PERFORMANCE OF CURED MATERIAL
Adhesive Properties
Cured for 1 hour @ 22 °C
Breakloose Torque, ISO 10964, Pre-torqued to 5 N·m:
3/8 x 16 zinc phosphate &
oil nuts and bolts (degreased)
N·m 5.7 to 28.4
LMS
(lb.in.) (50 to 250)
Cured for 24 hours @ 22 °C
Breakloose Torque, ISO 10964, Pre-torqued to 5 N·m:
M10 black oxide steel
nuts and bolts (degreased)
N·m 13 to 27
(lb.in.) (115 to 240)
3/8 x 16 steel nuts (grade
2) and bolts (grade 5)
(degreased)
N·m 13 to 27
(lb.in.) (115 to 240)
TYPICAL ENVIRONMENTAL RESISTANCE
Cured for 72 hours @ 22 °C
Breakloose Torque, ISO 10964, Pre-torqued to 5 N·m:
3/8 x 16 zinc phosphate & oil nuts and bolts
Hot Strength
Tested at temperature
% Strength @ 22 °C
Temperature, °C
100
75
50
25
0
0 50 100 150
Heat Aging
Aged at temperature indicated and tested @ 22 °C
% Initial Strength @ 22 °C
Exposure Time, hours
175
150
125
100
75
50
25
0
0 250 500 750 1000
100 °C
125 °C
150 °C
Chemical/Solvent Resistance
Aged under conditions indicated and tested @ 22 °C.
% of initial strength
Environment °C 500 h 1000 h
Motor oil (MIL-L-46152) 125 95 92
Gasoline 22 115 113
Brake fluid 22 118 120
Auto trans. fluid 87 115 115
Water/glycol 50/50 87 98 99
Ethanol 22 105 98
Acetone 22 92 105
Isopropanol 22 108 107
GENERAL INFORMATION
This product is not recommended for use in pure oxygen
and/or oxygen rich systems and should not be selected as
a sealant for chlorine or other strong oxidizing materials
For safe handling information on this product, consult the
Material Safety Data Sheet (MSDS).
Where aqueous washing systems are used to clean the
surfaces before bonding, it is important to check for
compatibility of the washing solution with the adhesive. In
some cases these aqueous washes can affect the cure and
performance of the adhesive.
This product is not normally recommended for use on plastics
(particularly thermoplastic materials where stress cracking of
the plastic could result). Users are recommended to confirm
compatibility of the product with such substrates.
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+860.571.5100
Henkel Europe
+49.89.320800.1800
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+86.21.2891.8863
For the most direct access to local sales and technical support visit: www.henkel.com/industrial