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 82618, Rubber and Vinyl Spray Adhesive 80, Yellow, 24 fl oz Can (Net Wt 19 oz), 7000028604, 6/Case
3M 22397, Roloc Disc 361F, 60 YF-weight, TR, 1-1/2 in x NH, 7000045097
ACS CX1250 Diamond Belt, 1/2" X 24" 250u
3M 05519, Sanding Block, Rubber, 2-3/4 in x 5 in, 7000000587
Standard Abrasives 78525, Ceramic Pro Type 29 Flap Disc, 645134, 4-1/2 in x 7/8 60 Y-weight, 7010331465
3M 29833, Sanding Screen, 120 Grit, 18 in x NH, 7100160843
3M 87103, Cloth Belt 341D, 24 X-weight, 9 in x 20 in, Fabri-lok, Single-flex, 7010326200, 20 per case
3M 32518, Cloth Belt 341D, P120 X-weight, 9 in x 48 in, Film-lok, Single-flex, 7010307962, 20 per case
3M 77197, Scotch-Brite™ Roloc™ Deburr and Finish PRO Unitized Wheel,TR, 3 in x 1/8 in x NH, 8C CRS+, 7100109130, 40/box
3M 40145, Thermosetable Glass Cloth Tape 3650, White, 8.3 mil, 7 in x 60 yd, 7100198501
3M 05612, Polyurethane Glass Adhesive Sealant 590, Black, 600 mL Sausage Pack, 7000121536, 12/Case 
