Features
■ Unique toughening system.
■ High shear strength.
■ Excellent elevated temperature performance.
■ Extremely high peel strength.
■ Excellent long-term durability.
■ Excellent cryogenic performance.
■ Flexible cure cycles (275-400°F).
■ Unsupported versions (Scotch-Weld AF 191U Film) available for reticulation.
■ Isolation version (Scotch-Weld AF 191G108 Film) available for bonding dissimilar substrates.
■ Sprayable version of Scotch-Weld AF 191 Film available (3M™ Scotch-Weld™ Structural Adhesive Primer EC-3710).
■ Available with light-weight conductive screens for lightning strike/composite surfacing applications. Technical Datasheet March 2009 Product Description Product Scotch-Weld Scotch-Weld Scotch-Weld Scotch-Weld Scotch-Weld Scotch-Weld Scotch-Weld Scotch-Weld AF 191K AF 191K AF 191M AF 191M AF 191M AF 191U AF 191U AF 191U Film Film Film Film Film Film Film Film Film Weight: (± .005 lb/ft2) .100 .08 .06 .035 .030 .05 .035 .015 (± 24.4 g/m2) 488 390 293 170 146 244 170 73 Film Thickness (mils) 16 13 10 6 5 8 6 2.5 Scrim: K = Nylon Knit M = Polyester Matte K K M M M U U U U = Unsupported Recommended Cure Temperature: 350°F (177°C)* Recommended Cure Time: 1 Hour* Volatile Content: Less than 1% Color: Tan *Note: See alternate cure cycle information.