Technical Data Sheet

3M™ Scotch-Weld™ Urethane Adhesive EC-3549 B/A NF

Typical Cured Physical Properties

Note: The following technical information and data should be considered representative or typical only and should not be

used for specification purposes.

Property

EC-3549 B/A NF

Appearance

Brown

Shore A Hardness (ASTM D 2240)

70-80

6-8 hrs @ 23°C (73°F)

7 days @ 23°C (73°F)

100%

Electrical

EC-3549 B/A NF

Dielectric Constant (ASTM D 150)

5.9 @ 1 KHz @ 23°C

Dissipation Factor (ASTM D 150)

0.12 @ 1 KHz @ 23°C

Dielectric Strength (ASTM D 149)

470 volts/mil

Volume Resistivity (ASTM D 257)

2.6 x 1014 ohm-cm

1

Handling strength determined per 3M test method C-3179. Time to handling strength taken to be that time

required to achieve 50 psi OLS strength using aluminum substrates.

2

The cure time is defined as that time required for the adhesive to achieve a minimum of 80% of the ultimate

strength as measured by aluminum - aluminum OLS.

3

Elongation is determined using 3M test method C-3094/ASTM D 882.

Typical Adhesive Performance Characteristics

I. Aluminum, Overlap Shear, at Temperature (PSI) (ASTM D1002)

Note: The following technical information and data should be considered representative or typical only and should not be

used for specification purposes.

Temperature

EC-3549 B/A NF

-40°F (-40°C)

3300

73°F (23°C)

2160

180°F (82°C) (15 min.)1

450

1

Represents time in test chamber oven before test.