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.

3M 20927, PSA Cloth Disc 348D, P240 X-weight, 1 in x NH, Die 100N, 7000118918
3M 87449 Silver Depressed Center Grinding Wheel, T27 Quick Change, 9 in x 1/4 in x 5/8-11 Center Hub Thread, 7010409732, 20 per case
3M 27551, EMI Copper Foil Shielding Tape 1181, 1/2 in x 18 yd (12.70 mm x 16.5m), 7000132182
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
3M 05182, Scotch-Brite Cut and Polish Wheel, CP-WL, 5A Fine, 6 in x 1/2 in x 1 in, 7100050403,Box of 4
3M 45120, Cartridge RoII Mandrel, 3/32 in x 3/4 in x 1/4 in, 7010328349
3M 22407, Roloc Disc 361F, 80 YF-weight, TR, 1-1/2 in, Die R150S, 7000045099
3M 11412, Roloc Disc 361F, 36 YF-weight, TR, 1 in, Die R100N, 7000045092
Dynabrade 95544 Gear Grease, 2.5oz. Tube
3M™ 72787, Calibration Kit 529-04-48, Large, 7000052154, 1 EA/Case
3M 86992, Diamond Disc, 3" Roloc, 674W, 120 Mesh, TR, 7100143477, Box of 5
3M 50728, Hookit Purple+ Curved Adapter Set Multi Hole, 70 mm x 127 mm, 7000032209
3M 36849, Dirt Trap Protection Material, White, 4 in x 300 ft, 7100133779
3M 82511, Steel Mesh Faceshield Screen W96MW 82511-00000, with Clear Eyeshield, Headgear Not Included 10 EA/Case, 7000127231
3M™ 72016, Remote Alarm & Strobe 529-05-20, Audible, 7000131708, 1 EA/Case
3M 47198, Polyurethane Sealant 540, Gray, 400 mL Sausage Pack, 7100198006, 12/Case
3M 16553, Scotch-Brite Extra Duty Hand Pad 6444, 6 in x 9 in, 7000028548, 60/Case
3M 08369, MSP Seam Sealer, White, 310 mL Flexpack, 7000045483, 6 per case
Dynabrade 22092 2-3/4" x 17" Hand Sanding Block
3M 05207, Hookit Sanding Block D/F, 70MM x 127MM, 7100007814
3M 08023, Adhesive Sealant 740 UV, White, 600 mL Sausage Pack, 7000000933, 12/Case
3M 62612, Scotch-Weld Threadlocker TL71, Red, 10 mL Bottle, 7100039197, 10/case
Standard Abrasives 840032, Quick Change Surface Conditioning FE Disc, A/O Medium, TSM, Maroon, 3/4 in, QS75KM, 7000046846, 50/case
Dynabrade 51863 .7 hp Trim Router (Complete), 20,000 RPM, 1/4 Collet
3M 29848, Sanding Screen, 180 Grit, 15 in x NH, 7100160815
3M 30202, Disposable Plastic Wheel Maskers, 12 in - 15 in, 125 per box, 7000125074
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
3M 47181, Polyurethane Adhesive Sealant 550FC Fast Cure, Black, 600 mL Sausage Pack, 7100197989, 12/Case
3M 96673, Glass Cloth Tape 398FR, White, 3 in x 36 yd, 7 mil, 7000001301
3M 29837, Sanding Screen, 180 Grit, 17 in x NH, 7100160762
3M 16066, PPS Mix Ratio Inserts, Mini (6 fl oz), 7000120511
Dynabrade 51333 .7 hp Router, 4" Base, Central Vacuum, 20,000 RPM, 1/4 Collet
Dynabrade 54972 Vane Set (5pk)
3M™ 17379, Versaflo™ Length Adjusting Breathing Tube BT-30, 7100009685, 1 EA/Case
3M™ 72013, Adapter 529-04-50, 110-120 VAC, 7000131705, 1 EA/Case
3M 33349, 641WY 1/4" X 24", 220 Mesh Diamond Cloth Belt, 7010534919
3M 05612, Polyurethane Glass Adhesive Sealant 590, Black, 600 mL Sausage Pack, 7000121536, 12/Case
3M 26139, PPS Series 2.0 Adapter, Type S43, 1/4 Male, 19 Thread BSP, 7100135337
3M 21543, Scotch-Brite Roloc Clean and Strip XT Pro Extra Cut Disc, TR, 2 in x NH, A XCS, 7100179815, 60/box
3M™ 07011, Supplied Air Respirator Hose W-9435-50/07011(AAD), 7000005373, 1 EA/Case
3M 04029, Scotch-Brite Hand Pad 7447, HP-HP, A/O Very Fine, Maroon, 6 in x 9 in, 7000000728, 60/Case
3M 03601, Plastic Emblem and Trim Adhesive, 1 oz, 7100045880, 24 per case
3M 22395, Roloc Disc 361F, 60 YF-weight, TR, 3 in, Die R300V, 7000045098
3M™ 07012, Supplied Air Hose W-9435-100/07012(AAD), 100 ft, 3/8 in ID, Industrial Interchange Fittings, High Pressure, 7000005375, 1 EA/Case
3M 70894, 641WY 1/2" X 24", 100 Mesh Diamond Cloth Belt, 7010533228
3M 29851, Sanding Screen, 100 Grit, 15 in x NH, 7100160814
3M 37852, Dirt Trap Protection Material, Gray, 28 in x 300 ft, 7100132343 
