Multi Purpose Sealant with Good UV Resistance
3M Polyurethane Sealant 540 is a single component, moisture curing, polyurethane sealant used to bond a wide variety of materials, including plastics, fiberglass reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal and wood. It exhibits high tensile strength, good UV resistance, low Shore A hardness and low modulus to maintain its functionality in a wide range of extreme service environments. Available in cartridge, sausage pack, pail and drum volumes to meet your application needs.
Recommended Applications
- Vertical and horizontal panel bonding and joint sealing
- Aluminum curtain walls and storefronts
- Transportation manufacturing (bus, rail, truck, trailer)
- Replacement of mechanical fasteners in many situations
Paintable after Skin Forms for Improved Appearance
3M Polyurethane Sealant 540 offers an alternative to mechanical fasteners and can replace rivets in some applications. It will bond dissimilar substrates and a wide selection of materials. This will perform in temperatures ranging from 40?F/ 40?C to 194?F/90?C. Once skin forms (60 90 minutes), the sealant can be painted to improve the final finish.
Understanding Polyurethane Sealants
Polyurethane sealants provide strong, flexible durable elastomeric bonds that seal against the elements. These sealants excel in challenging industrial, transportation and construction applications. Polyurethane sealants are available in a wide variety of Shore A hardness, open time and colors to meet many application needs. Choose a 3M Manual or Pneumatic Applicator for dispensing 3M adhesives sealant cartridges and 400ml/600ml sausage packs.
Bringing Better Ideas to the Surface through Science and Innovation
In our 3M Industrial Adhesives and Tapes Division, we apply the science of adhesion to deliver innovative solutions that improve the design and manufacturing processes of companies around the world. In the end, our technologies help customers like you deliver competitive products to the market faster and more efficiently.

Dynabrade 92100 3" W x 10-11/16" L 40 Grit A/Z DynaCut Belt, 10/pack
Dynabrade 78571 1-1/2" Dia. x 8-32 Female Center Thread, 60 Grit, A/O, 3-Ply, J-DynaCut Eyelet Star, 50/pack
Standard Abrasives 713096, Aluminum Oxide Handy Roll, P220 J-weight, 1 in x 50 yd, 7010369522
3M 53346, Scotch High Tack Box Sealing Tape 375+, Clear, 72 mm x 914 m, 4/Case, 7100216187
Dynabrade 94990 1/4" Female Composite-Style Coupler with 1/4" Male Plug Assembly
3M 57267, Temflex Cotton Friction Tape 1755, 2 in x 60 ft, Black, 7100016886
3M 53602, Paper Masking Tape 2214, Tan, 48 mm x 50 m, 5.4 mil, 24 Rolls/Case, 7100245636
Dynabrade 79195 3-1/2" W x 15-1/2" L 36 Grit DynaCut Premium Ceramic Belt, 10/pack
Dynabrade 48365 .4 hp Straight-Line Die Grinder, Rear Exhaust, 20,000 RPM, 1/8" Collet
Standard Abrasives 706311, Aluminum Oxide Handy Roll, P80 J-weight, 1-1/2 in x 50 yd, 7010369514
Dynabrade 56178 6" Dia. Vacuum Disc Pad, Vinyl-Face
Dynabrade 13507 Dynastraight Finishing Tool, 1 HP, Rear Exhaust, 4,500 RPM, 1/2" (13 mm) Dia. Arbor
Dynabrade 78724 3/8" x 3/4"-B52 Dynacut A/O Mounted Point, Vitrified, 5/pack
Dynabrade 11231 Contact Arm Ass'y, 3/4" Dia. x 1/2" W, Rubber Wheel, with 1/2" W Platen
Dynabrade 01580 Felt Silencer
Dynabrade 50010 Collet, 3/8"-24 Female Thread, 1/4" Capacity, 3-Piece Collet
Dynabrade 58506 3-7/8" W x 5-5/8" L Dynabug II Orbital Sander, Central Vacuum, .15 HP, 10,000 RPM, 3/32" Orbit
3M 60894, Impact Stripping Tape 500, Green, 1 in x 10 yd, 36 mil, 9 Rolls/Case, 7000001170
Dynabrade 78710 5/16" x 5/8"-B53 Dynacut A/O Mounted Point, 5/pack
Dynabrade 82566 3/4" W x 18" L 120 Grit Ceramic DynaCut Belt, 50/pack
Dynabrade 90410 1/8" W x 24" L 180 Grit A/O DynaCut Belt, 50/pack
Dynabrade 56177 6" Dia. Non-Vacuum Disc Pad, Vinyl-Face
Dynabrade 58510 3" W x 4" L (76 mm x 102 mm) Dynabug II Orbital Sander, Non-Vacuum
Dynabrade 56106 5" Dia. Non-Vacuum Disc Pad, Vinyl-Face 
