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.

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 23354, Home Dust Mask, 8661P4-DC, 7100159312, 4 Each/Pack
3M Flatback Tape 2517, Medium Brown, 36 mm x 55 m, 6.5 mil, 24Rolls/Case, 7000088501
3M 21511, Filter Adapter 502, 7000001931, 100 EA/Case
3M 28022, 8210 Plus Performance Sanding and Fiberglass Respirator 8210PH3-DC, 7100200441, 3 each/pack
3M 17322, Versaflo Respiratory Helmet Assembly M-405, with Standard Visor and Shroud, 7100009447, 1 EA/Case
3M 37339, Versaflo Powered Air Purifying Respirator PAPR Assembly TR-613N, Std Battery, BT-30 Breathing Tube, HD Belt, 7100035757, 1 EA/Case
3M 37378, Versaflo Filter Cover TR-6800FC/37378(AAD), for TR-6820N Filter, 7100021247, 1 EA/Case
3M 94246, Versaflo Powered Air Purifying Respirator Heavy Duty Assembly TR-813N/94246(AAD), 7100150924, 1 EA/Case
3M 94250, Versaflo Powered Air Purifying Respirator Heavy Industry Kit TR-800-HIK, 7100150927, 1 EA/Case
3M 94249, Versaflo Powered Air Purifying Respirator Easy Clean Kit TR-800-ECK, 7100150926, 1 EA/Case
3M 37348, Versaflo High Capacity Battery TR-632/37348(AAD), for TR-600 PAPR, 7100035836, 1 EA/Case
3M 33274, Performance Multi-Purpose Respirator 62023P1-DC, 7010296017
3M 17249, Versaflo Economy Headcover, S-103S-20, Small/Medium, 7000127462, 20 EA/Case
3M 90478, Sanding and Fiberglass Respirator N95 Particulate, 8200H10-DC, 7100160237, 10 Each/Pack
3M 37347, Versaflo Standard Battery TR-630/37347(AAD), for TR-600 PAPR, 7100035835, 1 EA/Case
3M 94933, Paint Sanding Valved Respirator 8511P2-C-PS-WM, 7100157701, 2 Each/Pack
3M 66278, Replacement Particulate Filter 5P71-6, P95, 7010301693, 6/Box
3M 37005, Head Harness 6897/37005(AAD), 7000002035, 5 EA/Case
3M 76550, Sealed-Seam Respirator Hood H-610-5, Collar, 7000126317, 5 EA/Case
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
3M 37019, Versaflo Air Regulating Valve Assembly V-300/37019(AAD), 7100077491, 1 EA/Case
Standard Abrasives 716916, Cartridge RoII Mandrel, 6997818, 1/8 in x 3/4 in x 1/4 in x 6 in CM-XL, 7010368732
Dynabrade 40320 Dynafile II Abrasive Belt Tool
Standard Abrasives 810910, Buff and Blend HS Disc, 8 in x 1/2 in A MED, 7000046750
Standard Abrasives 870710, Buff and Blend AP Disc, 6 in x 1/2 in A MED, 7000122061
Standard Abrasives 850030, Unitized Wheel Mandrel, 3-1/6 in OAL x 1/4 in Shank, 7010366891
Dynabrade 95544 Gear Grease, 2.5oz. Tube
3M 53915, Performance Plus Duct Tape 8979N (Nuclear), Red, 72 mm x 54.8 m, 12.1 mil, 7010334653
3M 50216, Temflex Cotton Friction Tape 1755, 3/4 in x 82-1/2 ft, Black, 7010297809
3M 43474, Glass Cloth Tape 3615, White, 1 in x 36 yd, 7 mil, 7000048876
3M 92057, Vinyl Duct Tape 3903, Yellow, 3 in x 50 yd, 6.5 mil, 7010378167
3M 20279, Disc Pad Holder 947TH, 7 in x 1 in x 5/8-11 Internal Black T Hook, 7000118602 
