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 35829, Hookit Dust Extraction Flexible Sanding Block Kit, 7100259119
Dynabrade 78113 2" Dia. x 80 Grit Premium Ceramic Non-Vacuum DynaCut Locking-Type Disc, 25/pack
Dynabrade 63603 RaptorVac PowerHead Replacement for 61203
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 45553, Cubitron ll Cloth Belt 784F, 36+ YF-weight, 3 in x 132 in, Film-lok, Single-flex, 7010308699, 25 per case
3M 14270, Disc Pad Face Plate, 4-1/2 in Hard Black, 7000144144
3M 11137, Roloc Disc 361F, 50 YF-weight, TR, 1-1/2 in, Die R150S, 7000045094
3M 97419, Aluminum Foil Tape 3380, Silver, 48 mm x 45 m, 3.25 mil, 7000049613
3M 10115, Synthetic Steel Wool Pads, #3 Coarse, 7000051986
Insize 0110-1125, ANEMOMETER, 6974029776595
3M 06536, Scotch Steel Gray Masking Paper, 06536, 36 in x 1000 ft, 1 per case, 7000045443
3M 45713, Cubitron II Hookit Cloth Disc 947A, 80+ X-weight, 3 in x NH, D/F 3HL, Die 300BE, 7100113145
Dynabrade 96101 Dynabrade Air Lube 10W/NR 24 Per Box
3M 76625, Roloc Disc 777F, 80 YF-weight, TR, 1 in, Die R100N, 7000045621
ACS CX1250 Diamond Belt, 1/2" X 24" 30u
3M 64324, Foil Tape 3340, Silver, 72 mm x 45.7 m, 3.9 mil, 7010335734
Dynabrade 64404 36" W x 60" L (914 mm W x 1,524 mm L) Metal Capture Downdraft Table, 230 V (AC), Side Exhaust
3M 26432, PPS Series 2.0 Sealing Plug, 96 plugs per pack, 7100135627
3M 20911, PSA Cloth Disc 348D, 50 X-weight, 2 in x NH, Die 200P, 7000118871
3M 22396, Roloc Disc 361F, 36 YF-weight, TR, 1-1/2 in, Die R150S, 7000045091
3M 88905, PSA Cloth Disc 348D, 40 X-weight, 12 in x NH, Die 1200B, 7010294665
3M 76783, Cubitron II Hookit Cloth Disc 784F, 120+ XF-weight, 5 in x NH, Die 500X, 7100222757
3M 20889, PSA Cloth Disc 348D, 50 X-weight, 5 in x NH, Die 500X, 7010294666
3M 28126, Hookit Clean Sanding Disc 900DZ, 5 in 80 J-weight, Die 500LG, 7010290258
3M 95725, Venture Tape Metal Building Facing Tape 1552CW, White, 72 mm x 45.7 m, 7010313505
Dynabrade 82577 1/2" W x 24" L 80 Grit Ceramic DynaCut Belt, 50/pack
Dynabrade 60051 .1 hp Straight-Line Quick-Change Pencil Grinder, Rear Exhaust, 60,000 RPM, 1/8" Collet
3M 80510, Roloc Disc 777F, P120 YF-weight, TR, 1 in, Die R100N, 7000045622
3M 05280, Marine Adhesive Sealant 4000 UV, White, 3 oz Tube, 7000121531, 6/Case
3M 01328, PSA Cloth Disc 348D, P180 X-weight, 3 in x NH, Die 300V, 7000045068
3M 22404, Roloc Disc 361F, 80 YF-weight, TR, 3 in, Die R300V, 7000045100
3Mâ„¢ 72787, Calibration Kit 529-04-48, Large, 7000052154, 1 EA/Case
3M 62714, Scotch-Weld Stainless Steel High Temperature Pipe Sealant PS67, White, 50 mL Tube, 7100039216, 10/case
3M 97105, Cartridge Roll 341D, 60 X-weight, 5/8 in x 1-1/2 in x 1/8 in, 7010363831
3M 76630, Roloc Disc 777F, 50 YF-weight, TR, 2 in, Die R200P, 7000045627
3M 22393, Roloc Disc 361F, 36 YF-weight, TR, 3 in, Die R300V, 7000045093
3M 06524, Scotch Steel Gray Masking Paper, 06524, 24 in x 1000 ft, 1 per case, 7000045442
3M 22399, Roloc Disc 361F, 50 YF-weight, TR, 2 in, Die R200P, 7000028184
3M 24049, Wetordry Cloth Disc 281W, P1000 YF-weight, 8 in x NH, Die 800JM, 7000045052
3M 10120, Synthetic Steel Wool Pads, 10120NA, #000 Extra Fine, 7000126149
3M 20886, PSA Cloth Disc 348D, P100 X-weight, 5 in x NH, Die 500X, 7000148148
Dynabrade 90874 2" Dia. Very Fine NWN DynaBrite Locking-Type Disc, 25/pack
3Mâ„¢ 17323, Versafloâ„¢ Respiratory Helmet Assembly M-407, with Premium Visor and Flame Resistant Shroud, 7000002395, 1 EA/Case
3M 65487, Pro Grade Precision Ultra Durable Universal Hole Sanding Disc, DUH560TRI-10T, 5 IN x UH, 60, 7100202913, 10 per pack
3M 33439, Cubitron II File Belt, 33439, 60+, 10 mm x 330 mm (3/8 in x 13 in), 7100033194, 10 belts per carton, 5 cartons per case
3M 77558, Cubitron II Hookit Cloth Disc 947A, 77558, 40+ to 120+, 6 in x NH, Die 600Z, 7100232737
3M 22408, Roloc Disc 361F, P100 YF-weight, TR, 1-1/2 in, Die R150S, 7000045101
3M 29611, 641WY 1/4" X 24", 100 Mesh Diamond Cloth Belt, 7010534832
Dynabrade 95843 Dynabrade Air Lube 10W/NR, 1 Gallon
3M 08027, Marine Grade Silicone Sealant, White, 304 mL Cartridge, 7000120476, 12/Case 
