Technical Data Sheet
LOCTITE®246™
January-2011
PRODUCT DESCRIPTION
LOCTITE®246™ provides the following product
characteristics:
Technology Acrylic
Chemical Type Dimethacrylate ester
Appearance (uncured) Blue opaque liquidLMS
Fluorescence Positive under UV lightLMS
Components One component -
requires no mixing
Viscosity Medium, thixotropic
Cure Anaerobic
Secondary Cure Activator
Application Threadlocking
Strength Medium
LOCTITE®246™ is designed for the locking and sealing of
threaded fasteners which require normal disassembly with
standard hand tools. The product cures when confined in the
absence of air between close fitting metal surfaces and
prevents loosening and leakage from shock and vibration.
Particularly suitable for heavy duty applications such as bolts
used in transmissions, construction equipment or railroad
assemblies where resistance to heavy shock, vibration and
stress level is required along with exposure to elevated
temperatures. The thixotropic nature of LOCTITE®246™
reduces the migration of liquid product after application to the
substrate.
TYPICAL PROPERTIES OF UNCURED MATERIAL
Specific Gravity @ 25 °C 1.15
Flash Point - See SDS
Viscosity, Brookfield - RVF, 25 °C, mPa·s (cP):
Spindle 3, speed 20 rpm, 2,000 to 4,000LMS
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 black oxide steel bolts and mild steel nuts compared to
different materials and tested according to ISO 10964.
% of Full Strength on Steel
Cure Time
150
125
100
75
50
25
0
1min 5min10min 30min 1h 3h 6h 24h 72h
Zinc dichromate
Zinc phosphate
Stainless steel
Reoiled Zn phos
Black oxide
Cure Speed vs. Temperature
The rate of cure will depend on the temperature. The graph
below shows the breakaway strength developed with time at
different temperatures on M10 black oxide steel bolts and mild
steel nuts and tested according to ISO 10964.
% of Full Strength on Steel
Cure Time
100
75
50
25
0
1min 5min10min 30min 1h 3h 6h 24h 72h
5 °C
40 °C
22 °C
TDS LOCTITE®246™, January-2011
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 breakaway strength
developed with time on M10 zinc dichromate steel nuts and
bolts using Activator 7471™ and 7649™ and tested according
to ISO 10964.
% of Full Strength on Steel
Cure Time
100
75
50
25
0
1min 5min10min 30min 1h 3h 6h 24h 72h
Activator 7471™
Activator 7649™
No activator
TYPICAL PERFORMANCE OF CURED MATERIAL
After 24 hours @ 22 °C
Breakaway Torque, ISO 10964:
3/8 x 16 steel nuts (grade
2) and bolts (grade 5)
N·m 11.3 to 22.6LMS
(lb.in.) (100 to 200)
3/8 x 16 zinc nuts and bolts N·m 5.7 to 22.6LMS
(lb.in.) (50 to 200)
Breakloose Torque, ISO 10964, Pre-torqued to 5 N·m:
M10 black oxide steel
nuts and bolts
N·m 15 to 24
(lb.in.) (130 to 210)
Max. Prevail Torque, ISO 10964, Pre-torqued to 5 N·m:
M10 black oxide steel
nuts and bolts
N·m 4 to 9
(lb.in.) (35 to 80)
Lubricity, K-Factor:
3/8 x 16 phosphate & oil bolts and
steel nuts
0.17
After 24 hours @ 22 °C followed by 72 hours @ 204 °C, tested @ 22
°C
Breakaway Torque, ISO 10964:
3/8 x 16 steel nuts (grade
2) and bolts (grade 5)
N·m ≥5.7LMS
(lb.in.) (50)
Prevail Torque, ISO 10964:
3/8 x 16 steel nuts (grade
2) and bolts (grade 5)
N·m ≥2.0LMS
(lb.in.) (18)
TYPICAL ENVIRONMENTAL RESISTANCE
After 24 hours @ 22 °C
Breakloose Torque, ISO 10964, Pre-torqued to 5 N·m:
M10 zinc phosphate steel nuts and bolts
Hot Strength
Tested at temperature
% Strength @ 22 °C
Temperature, °C
100
75
50
25
0
0 50 100 150 200 250 300
Degreased
Reoiled
Heat Aging
Aged at temperature indicated and tested @ 22 °C
% Initial Strength @ 22 °C
Exposure Time, hours
200
175
150
125
100
75
50
25
0
0 100 200 300 400 500 600 700 800 900 1000
150 °C
200 °C
260 °C
Chemical/Solvent Resistance
Aged under conditions indicated and tested @ 22 °C.
% of initial strength
Environment °C 100 h 500 h 1000 h
Motor oil (MIL-L-46152) 125 180 180 180
Unleaded gasoline 22 95 95 95
Brake fluid 22 100 110 120
Ethanol 22 90 95 100
Acetone 22 75 75 75
Water/glycol 50/50 87 150 165 165
Transmission fluid 125 175 175 185
Henkel Americas
+860.571.5100
Henkel Europe
+49.89.320800.1800
Henkel Asia Pacific
+86.21.2891.8859
For the most direct access to local sales and technical support visit: www.henkel.com/industrial
TDS LOCTITE®246™, January-2011
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
Safety Data Sheet (SDS).
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.
Directions for use:
For Assembly
1. For best results, clean all surfaces (external and internal)
with a LOCTITE® cleaning solvent and allow to dry.
2. If the material is an inactive metal or the cure speed is
too slow, spray all threads with Activator 7471™ or
7649™ and allow to dry.
3. Shake the product thoroughly before use.
4. To prevent the product from clogging in the nozzle, do
not allow the tip to touch metal surfaces during
application.
5. For Thru Holes, apply several drops of the product onto
the bolt at the nut engagement area.
6. For Blind Holes, apply several drops of the product
down the internal threads to the bottom of the hole.
7. For Sealing Applications, apply a 360° bead of product
to the leading threads of the male fitting, leaving the first
thread free. Force the material into the threads to
thouroughly fill the voids. For bigger threads and voids,
adjust product amount accordingly and apply a 360°
bead of product on the female threads also.
8. Assemble and tighten as required.
For Disassembly
1. Remove with standard hand tools.
2. In rare instances where hand tools do not work because
of excessive engagement length, apply localized heat to
nut or bolt to approximately 250 °C. Disassemble while
hot.
For Cleanup
1. Cured product can be removed with a combination of
soaking in a Loctite solvent and mechanical abrasion
such as a wire brush.
Loctite Material SpecificationLMS
LMS dated January-16, 1999. Test reports for each batch are
available for the indicated properties. LMS test reports include
selected QC test parameters considered appropriate to
specifications for customer use. Additionally, comprehensive
controls are in place to assure product quality and
consistency. Special customer specification requirements may
be coordinated through Henkel Quality.
Storage
Store product in the unopened container in a dry location.
Storage information may be indicated on the product container
labeling.
Optimal Storage: 8 °C to 21 °C. Storage below 8 °C or
greater than 28 °C can adversely affect product properties.
Material removed from containers may be contaminated during
use. Do not return product to the original container. Henkel
Corporation cannot assume responsibility for product which
has been contaminated or stored under conditions other than
those previously indicated. If additional information is required,
please contact your local Technical Service Center or
Customer Service Representative.
Conversions
(°C x 1.8) + 32 = °F
kV/mm x 25.4 = V/mil
mm / 25.4 = inches
µm / 25.4 = mil
N x 0.225 = lb
N/mm x 5.71 = lb/in
N/mm² x 145 = psi
MPa x 145 = psi
N·m x 8.851 = lb·in
N·m x 0.738 = lb·ft
N·mm x 0.142 = oz·in
mPa·s = cP
Note:
The information provided in this Technical Data Sheet (TDS) including
the recommendations for use and application of the product are based
on our knowledge and experience of the product as at the date of this
TDS. The product can have a variety of different applications as well as
differing application and working conditions in your environment that
are beyond our control. Henkel is, therefore, not liable for the suitability
of our product for the production processes and conditions in respect
of which you use them, as well as the intended applications and
results. We strongly recommend that you carry out your own prior trials
to confirm such suitability of our product.
Any liability in respect of the information in the Technical Data Sheet or
any other written or oral recommendation(s) regarding the concerned
product is excluded, except if otherwise explicitly agreed and except in
relation to death or personal injury caused by our negligence and any
liability under any applicable mandatory product liability law.
In case products are delivered by Henkel Belgium NV, Henkel
Electronic Materials NV, Henkel Nederland BV, Henkel
Technologies France SAS and Henkel France SA please
additionally note the following:
In case Henkel would be nevertheless held liable, on whatever legal
ground, Henkel’s liability will in no event exceed the amount of the
concerned delivery.
In case products are delivered by Henkel Colombiana, S.A.S. the
following disclaimer is applicable:
The information provided in this Technical Data Sheet (TDS) including
the recommendations for use and application of the product are based
on our knowledge and experience of the product as at the date of this
TDS. Henkel is, therefore, not liable for the suitability of our product for
the production processes and conditions in respect of which you use
them, as well as the intended applications and results. We strongly
Henkel Americas
+860.571.5100
Henkel Europe
+49.89.320800.1800
Henkel Asia Pacific
+86.21.2891.8859
For the most direct access to local sales and technical support visit: www.henkel.com/industrial
TDS LOCTITE®246™, January-2011
recommend that you carry out your own prior trials to confirm such
suitability of our product.
Any liability in respect of the information in the Technical Data Sheet or
any other written or oral recommendation(s) regarding the concerned
product is excluded, except if otherwise explicitly agreed and except in
relation to death or personal injury caused by our negligence and any
liability under any applicable mandatory product liability law.
In case products are delivered by Henkel Corporation, Resin
Technology Group, Inc., or Henkel Canada Corporation, the
following disclaimer is applicable:
The data contained herein are furnished for information only and are
believed to be reliable. We cannot assume responsibility for the results
obtained by others over whose methods we have no control. It is the
user's responsibility to determine suitability for the user's purpose of
any production methods mentioned herein and to adopt such
precautions as may be advisable for the protection of property and of
persons against any hazards that may be involved in the handling and
use thereof. In light of the foregoing, Henkel Corporation specifically
disclaims all warranties expressed or implied, including
warranties of merchantability or fitness for a particular purpose,
arising from sale or use of Henkel Corporation’s products. Henkel
Corporation specifically disclaims any liability for consequential
or incidental damages of any kind, including lost profits. The
discussion herein of various processes or compositions is not to be
interpreted as representation that they are free from domination of
patents owned by others or as a license under any Henkel Corporation
patents that may cover such processes or compositions. We
recommend that each prospective user test his proposed application
before repetitive use, using this data as a guide. This product may be
covered by one or more United States or foreign patents or patent
applications.
Trademark usage
Except as otherwise noted, all trademarks in this document are
trademarks of Henkel Corporation in the U.S. and elsewhere. ®
denotes a trademark registered in the U.S. Patent and Trademark
Office.
Reference 1.3
Henkel Americas
+860.571.5100
Henkel Europe
+49.89.320800.1800
Henkel Asia Pacific
+86.21.2891.8859
For the most direct access to local sales and technical support visit: www.henkel.com/industrial
