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 11857 Cover Guard Gasket
Dynabrade 52202 .4 hp Straight-Line Die Grinder, Front Exhaust, 30,000 RPM, 1/4" Collet
Dynabrade 40014 Housing Assembly, Dynafile II
Dynabrade 59182 6" Dia. Dynorbital-Spirit Random Orbital Sander, Central Vacuum, 3/16" Orbit
Dynabrade 93166 4" Dia. X 1/4" Dia. Shank, 80 Grit, A/O, Spindle-Mount Sanding Star
Dynabrade 51624 .1 hp Straight-Line Pencil Grinder, Central Vacuum, 35,000 RPM, 3mm Collet
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Dynabrade 59511 Dynorbital-Spirit Drop-In Motors (10 Pack)
Dynabrade 78645 1/2" Dia. x 1-1/2" W x 1/8" Center Hole, Z/A, 60 Grit, 100/pack
Dynabrade 11202 Contact Arm Ass'y, 5/8" Dia. x 1/8" W, Rubber Wheel, with 1/4" W Platen
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Dynabrade 56197 6" Dia. Non-Vacuum Disc Pad, Hook-Face, Short Nap
Dynabrade 53074 1/4" Right Angle Drill, .4 HP, Rear Exhaust, 5,000 RPM
Dynabrade 59020 5" Dia. Non-Vacuum Dynorbital-Spirit Random Orbital Sander, 3/16" Orbit
Dynabrade 15346 Contact Wheel Ass'y, 2" Dia. x 5/8" W x 5/8" I.D., Crown Face, 40 Duro Rubber
3M 41597, Polyurethane Adhesive Sealant 560, Black, 310 mL Cartridge, 7100005901, 12/Case 
