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 94733, Cubitron ll Cloth Belt 947A, 60+ X-weight, 3-1/2 in x 15-1/2 in, Fabri-lok, Single-flex, 7100093314, 50 per case
Dynabrade 78122 2" Dia. Medium NWN DynaBrite Locking-Type Disc, 25/pack
3M 17534 Scotch-Brite Surface Conditioning Low Stretch Belt, SC-BL, A/O Medium, 2-1/2 in x 60 in, 7010366042
3M 26118, PPS Series 2.0 Adapter, Type S26, 11 mm Male, 1.0 mm Thread, 7100135924
3M 76783, Cubitron II Hookit Cloth Disc 784F, 120+ XF-weight, 5 in x NH, Die 500X, 7100222757
Insize 1120-300A, DIGITAL INSIDE GROOVE CALIPER, 1.18-12"/30-300mm, 6928640302244
Dynabrade 92118 1/4" W x 12" L 180 Grit A/O DynaCut Belt, 50/pack
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
3M 11411, Roloc Disc 361F, 50 YF-weight, TR, 1 in, Die R100N, 7000045095
Standard Abrasives 840038, Quick Change Surface Conditioning GP Disc, A/O Medium, TSM, Maroon, 3/4 in, QS75KM, 7000121647, 50/case
3M 71358, 641WY 1/4" X 24", 600 Mesh Diamond Cloth Belt, 7010534894
3M 97957, Hi-Strength Spray Adhesive 90 CA, Low VOC <25%, Clear, 24 fl oz Can (Net Wt 19.0 oz), 7000121418, 12/Case
3M 22407, Roloc Disc 361F, 80 YF-weight, TR, 1-1/2 in, Die R150S, 7000045099
3M 19768, Utility Cloth Sheet 314D, 9 in x 11 in P180 J-weight, 7000000356
3M 22393, Roloc Disc 361F, 36 YF-weight, TR, 3 in, Die R300V, 7000045093
Dynabrade 78402 2" Dia. x 1/2", Dyna Premium Rapid Strip TR Disc, 25/pack
Dynabrade 11476 Dynabelter Abrasive Belt Tool, Heavy-Duty
3M 45717, Cubitron II Hookit Cloth Disc 947A, 80+ X-weight, 5 in x NH, D/F 5HL, Die 500FH, 7100113111
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
Dynabrade 40610 Electric Dynafile II Abrasive Belt Tool
3M 08916 Scotch-Brite Surface Conditioning Belt, SC-BS, A/O Medium, 2 in x 60 in, 7010309628
Dynabrade 58445 8" Dia. Two-Hand Gear-Driven Sander, Non-Vacuum, .45 HP, 900 RPM, PSA
3M 86992, Diamond Disc, 3" Roloc, 674W, 120 Mesh, TR, 7100143477, Box of 5
Norton 66261127733 - 2" X 50 Yard 60 Grit Metalite™ Aluminum Oxide Cloth Roll, 1 Each
3M 19764, Utility Cloth Sheet 314D, 9 in x 11 in P320 J-weight, 7000000352
Dynabrade 98050 3/8"-24 Female, 5/8"-11 Male, 2" Length
3M 22397, Roloc Disc 361F, 60 YF-weight, TR, 1-1/2 in x NH, 7000045097
3M 19773, Utility Cloth Sheet 314D, 9 in x 11 in P60 X-weight, 7000000360
3M 20230, Scotch-Seal Metal Sealant 2084, Silver, 5 Gallon Drum (Pail), 7000046344
Dynabrade 95544 Gear Grease, 2.5oz. Tube
3M 19674, Scotch-Seal Industrial Sealant 800, Reddish Brown, 5 oz Tube, 7000000792, 36/Case
Dynabrade 14000 Dynafile Abrasive Belt Tool
Dynabrade 13509 Dynastraight Finishing Tool, Rear Exhaust, 6,000 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor
3M 20279, Disc Pad Holder 947TH, 7 in x 1 in x 5/8-11 Internal Black T Hook, 7000118602 
