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Scotch-Seal
TM
Tamper Proof Sealant
1252
Advantages • 3M™ Scotch-Seal™ Tamper Proof Sealant 1252 is a one-part, fast drying, anti-
tamper sealer.
• Self-extinguishing.
• It can be applied over adjustable or removable parts to indicate changes in
position. A break in the seal indicates tampering or movement.
• Scotch-Seal 1252 is used in the electronics industry to protect settings and
calibrations of hydraulic, pneumatic, and electronic equipment against tampering.
Scotch-Seal 1252 is also used to seal components between stages of assembly
and parts which are restricted to adjustment, alteration, or access by qualified
personnel.
• Will not support fungus growth.
• Exposed surfaces of Scotch-Seal 1252 will accept ink from an inspector’s
approval stamp within 20 seconds of application.
• Commonly used by aircraft industry to indicate sabotage, tampering, alteration or
vibration loosening.
Technical Data Issue No. 5
Typical Physical
Properties Note: The following technical information and data should be consider ed representative
or typical only and should not be used for specification purposes.
Viscosity:
500-2500 poise
Brookfield Viscometer: RVF #6 Spindle @ 4 rpm @ 77°F (26°C)
Solids (by weight): 61-73%
Base: Nitrile-Phenolic
Colors Available (wet and dry): White, Blue, Red, Orange, Green,
Gray, Pink, Yellow
Net Weight: 12.3-13.3 lbs/gal
Flash Point (closed cup): 20°F (-4°C)
Scotch-SealTM
Tamper Pr oof Sealant
1252
Handling/Application Application: Scotch-Seal 1252 is a one-part, air drying compound suitable for hand
extruding. Surfaces must be clean, dry and dust free.
Cleanup: Excess may be removed with a solv ent such as 3M™Scotch-Grip™
Solvent #3 or methyl ethyl ketone (MEK).*
*Note: When using solvents, extinguish all ignition sources and follow the
manufacturer’s precautions and directions for use.
Typical Performance
Characteristics Note: The following technical information and data should be consider ed representative
or typical only and should not be used for specification purposes.
•Drying Time: An 1/8" thick layer of Scotch-Seal 1252 will dry tack free in
20 seconds.
•Hardness: Shore A Hardness of 97-99 after drying for 24 hours @ 77°F (25°C)/
50% relative humidity.
•Friability: Scotch-Seal 1252 will easily crumble when flexed or twisted.
•Flammability: Dry film of Scotch-Seal 1252 is self-extinguishing and flame will
self-extinguish within 15 seconds.
•Dielectric Strength (minimum): 100 volts/mil (Fed. Standard #406, Method
4031).
•Surface Resistivity (minimum): 1010 ohms (Fed. Standard #406, Method 4041).
•Volume Resistivity (minimum): 1010 ohms-cm (Fed. Standard #406 Method
4041).
•Heat Resistance: 1252 Sealant dried for 24 hours @ 77°F (25°C)/50% relative
humidity will withstand 200°F (93.3°C) for 72 hours without loss of adhesion or
sagging.
•Fluid Resistance: Scotch-Seal 1252 was cured 24 hours @ 77°F (25°C)/50% R.H.
and then immersed in the following fluids:
Pure Oxygen No effect
MIL-L-7808 Oil Moderate softening; good adhesion
Aviation Gas (115/145) Slight softening; good adhesion
3% Salt Water No ef fect
Tap Water No ef fect
JP-4 Fuel Slight softening; good adhesion
Skydrol®Splash Slight softening; good adhesion
•Adhesion Overlap (Shear Strength) Aluminum (Alclad) Steel
Average of 6 173 psi 164 psi
1" x 1/2" overlap – 10 mil thick bond line. Specimens were cured for
24 hours @ 77°F (25°C).
•Corrosion: After 72 hours @ 77°F (25°C) there was no evidence of corrosion on
steel, aluminum, brass or silver.
•Low Temp. Shock: Dried films 1/16" thick withstand 3 foot-lbs. shock at -20°F
(-29°C) without loss or adhesion.
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Scotch-SealTM
Tamper Pr oof Sealant
1252
Storage and Handling Storage: Store product at 40°F (4°C) for maximum storage life. Higher temperatures
reduce normal storage life. Lower storage temperatures temporarily
increase viscosity.
Rotate stock on a “first in-first out” basis.
Tubes must be stored tips down.
Shelf life: 3M Standard shelf life of Scotch-Seal 1252 is 12 months from date of
shipment from 3M when stored @ 40°F (4°C) or belo w. 3M Standard shelf life
of Scotch-Seal 1252 is 9 months from date of shipment from 3M when stored @
60-80°C (16-27°C).
Note: 3M Scotch-Seal 1252 is identical to 3M EC-1252 in chemical composition. EC-1252
has been labeled, packaged, tested, and certified for aircraft and aerospace a pplication.
Scotch-Seal 1252 may be used for aircraft and aerospace application if proper
Certificates of Test have been issued and material meets all specification requirements.
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Scotch-SealTM
Tamper Pr oof Sealant
1252
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Skydrol is a registered trademark
of Monsanto Corporation.
Printed in U.S.A.
©3M 1999 78-6900-9744-5
Recycle, Neg
Recycled Paper
40% pre-consumer
10% post-consumer
To request additional product information or to arrange for sales assistance, call toll
free (800) 235-2376. Our fax number is (417) 869-5219. Address correspondence to:
3M Aerospace Central, 3211 E. Chestnut Express way, Springfield, MO 65802.
For Additional
Information
3M MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. User is
responsible for determining whether the 3M product is fit for a particular purpose and suitable for user’s
method of application. Please remember that many factors can aff ect the use and performance of a 3M
Adhesives Division product in a particular application. The materials to be bonded with the product, the
surface preparation of those materials, the product selected for use, the conditions in which the product is
used, and the time and en vironmental conditions in which the product is expected to perform are among
the many factors that can affect the use and performance of a 3M product. Given the variety of factors
that can affect the use and performance of a 3M product, some of which are uniquely within the user’s
knowledge and control, it is essential that the user evaluate the 3M product to determine whether it is fit
for a particular purpose and suitable for the user’s method of application.
Important Notice
If the 3M product is proved to be defective, THE EXCLUSIVE REMEDY, AT 3M’S OPTION, SHALL BE
TO REFUND THE PURCHASE PRICE OF OR TO REPAIR OR REPLACE THE DEFECTIVE 3M
PRODUCT. 3M shall not otherwise be liable for loss or damages, whether direct, indirect, special,
incidental, or consequential, regardless of the legal theory asserted, including negligence , warranty, or
strict liability.
Limitation of Remedies
and Liability
This Adhesives Division product was manufactured under a 3M quality system registered to ISO 9002
standards.
ISO 9002
See Product Label and Material Safety Data Sheet for health and safety information
before using this product. F or additional health and safety information call 1-800-364-
3577 or 651-737-6501.
Precautionary
Information
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Adhesives Division
3M Center, Building 220-8E-05
St. Paul, MN 55144-1000
Phone: 1-800-364-3577 or 651/737-6501
