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.

Standard Abrasives 840702, Cleaning Pro Disc, 6 in x 1/2 in, SPR 44304A, 7000046881
Standard Abrasives 840400, Quick Change Felt Polishing Disc, TSM, 3 in, 7000047161
Dynabrade 51301 .5 hp Straight-Line Die Grinder
3M 90893, Scotch Tough Grip Moving Packaging Tape 3500-40-6, 1.88 in x 43.7 yd (48 mm x 40 m), 7100103559
Standard Abrasives 880315, Buff and Blend GP Wheel, 2 in x 2 Ply x 1/4 in A VFN, 7100095565
3M 46795, Polyester Film Electrical Tape 1318-1, Black, 24 in X 72 yd, 3-in paper core, Log roll, 7000132840
3M 98420, Grid Air Sealing Tape 8068-NL, 4 in x 75 ft, 8 rolls per case, 7010376442
Standard Abrasives 845619, Surface Conditioning GP Disc, 5 in VFN, 7000121664
Standard Abrasives 541151, Quick Change TS P.A.R.T. #21 Disc Mandrel, 5/8 in TA4 (PILOT), 7000121723
Standard Abrasives 840710, Buff and Blend GP Disc, 6 in x 1/2 in A MED, 7000121863
3M 57364, Polyester Film Electrical Tape 5, 3/4 in x 72 yd, Bulk 3-in plastic core, 7100134567
3M 00018, Scotchrap Vinyl Corrosion Protection Tape 50, 4 in x 100 ft,Printed, Black, 12 rolls/Case, 7010397563
Standard Abrasives 845617, Surface Conditioning GP Disc, 5 in CRS, 7000121663
3M 62335, Preservation Sealing Tape 4811, White, 3 in x 36 yd, 9.5 mil, 12rolls per case, 7010334077
Dynabrade 13509 Dynastraight Finishing Tool, Rear Exhaust, 6,000 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor
3M 42803, Scotchrap Vinyl Corrosion Protection Tape 51, 2 in x 100 ft,Printed, Black, 12 rolls/Case, 7000132743 
