Cut Sheet

3M
™
Scotch-Seal
™
Tamper Proof Sealant
1252
Typical Performance
Characteristics
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
• Drying Time: A 1/8" layer of 3M™ Scotch-Seal Tamper Proof Sealant 1252 is
tack-free in 20 seconds and suitable for stamping with ink.
• Hardness: After 24 hours @ 77°F (25°C), 50% R.H., has a Shore A hardness
of 97-99.
• Friability: Easily crumbled when the surface to which it is applied is flexed or
twisted.
• Flammability: Dry film of the sealant is fire retardant and flames will extinguish
themselves within 15 seconds.
• Dielectric Strength: 100 volts/mil, minimum, Fed. Standard #406, Method 4031.
• Surface Resistivity: 10
10
ohms, minimum, Fed. Standard #406, Method 4041.
• Volume Resistivity: 10
10
ohms-cm, minimum, Fed. Standard #406, Method 4041.
• Heat Resistance: Dried for 24 hours @ 77°F (25°C) 50% R.H., withstands
200°F (93.3°C) for 72 hours without loss of adhesion or sagging.
• Fluid Resistance: Cured 24 hours @ 77°F (25°C) 50% R.H. was immersed in
the following fluids:
MIL-L-7808 Oil Moderate softening; good adhesion
Aviation Gas (115/145) Slight softening; good adhesion
3% Salt Water No effect
Tap Water No effect
JP-4 Fuel Slight softening; good adhesion
• Adhesion Overlap (Shear Strength) Aluminum (Alclad) Steel
Average of 6 173 psi 164 psi
1" x 1
1
/2" overlap – 10 mil thick bond line. Specimens were cured for 24 hours
@ 77°F (25°C).
• Overlap Shear: 1" x 1
1
/2" – 10 mil thick films cured 24 hours @ 77°F (25°C).
• Corrosion: After 72 hours @ 77°F (25°C) there is 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 of adhesion.
- 2 -
Storage
Store at 60-80°F (16-27°C) for maximum storage life. Higher temperatures
reduce normal storage life. Lower temperatures cause increased viscosity of a
temporary nature. Tubes must be stored in an inverted position (tips down). Rotate
stock on a “first in-first-out” basis.
Shelf Life
When stored in the original unopened container, under the conditions recommended,
this product has a shelf life of 9-12 months @ 40°F (4°C).