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 53533 Cone or Plug Grinder (Triple Extension)
Dynabrade 56880 5" Dia. Non-Vacuum Dynorbital Supreme Random Orbital Sander, 3/8" Orbit
Standard Abrasives 880476, Buff and Blend HS Wheel, 3 in x 3 Ply x 1/4 in A MED, 7100095564
Norton 66261014793 - 3" Medium Grade Aluminum Oxide Bear-Tex Speed-Lok High Strength Maroon TR Non-Woven Abrasive Disc, 80 Each
Dynabrade 07109 Vane Set (5pk)
3M 65056, Scotch-Brite Blending Hand Pad 7446, HP-HP, SiC Medium, 6 in x 9 in, 7100082599, 40/Case
Dynabrade 15336 Rubber Drive Wheel
3M™ 17379, Versaflo™ Length Adjusting Breathing Tube BT-30, 7100009685, 1 EA/Case
3M 49456, EMI Aluminum Foil Shielding Tape 1170, 2 in x 18 yd, 1170-2"X18YD, 7000132702
Norton 66623335430 - 3" Quick-Change Non-Woven Abrasive Disc, Medium Grade, 25 Each
Dynabrade 51731 .1 hp Straight-Line Pencil Grinder, 60,000 RPM, 1/8" Collet
3M 03647, Scotch-Brite Edger Disc Pad, 7 in x .875 in, 7000133920
Dynabrade 95544 Gear Grease, 2.5oz. Tube
Dynabrade 51811 .1 hp Straight-Line Pencil Grinder, Rear Exhaust, 1000,000 RPM, 1/16" Collet
Insize ISY-600-800021, CLIP, 6940561980509
3M 94908, Scotch-Brite EXL PRO Deburring Wheel, 8 in x 1 in x 3 in, 7100042695
Dynabrade 10690 Filter/Regulator/Lubricator, FRL40, 1/2" NPTAssy.
3M 86407, Scotch-Weld Multi-Material Composite Urethane Adhesive DP6310NS,Green, 48.5 mL Duo-Pak, 7100109829, 12/case
ACS CX1250 Diamond Belt, 1/2" X 24" 74u 
