Creates Flexible Seals on Expansion Joints
3M™ Polyurethane Construction Sealant 525 is a single-component, moisture-curing polyurethane sealant used to seal construction expansion joints. It can seal a wide variety of materials, including plastics, fiberglass reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal and wood. It creates a strong, permanent elastic bond with elongation of over 800%. It will seal a wide selection of materials, including concrete, wood, PVC and metal. This adhesive will perform in temperatures ranging from -22?F/-40?C to 176?F/80?C. Once skin has formed, this sealant can be painted to improve the final finish. Available in cartridges, sausage packs and bulk format to meet your application needs.
Recommended Applications
- Sealing expansion joints
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 11475 Dynabelter Abrasive Belt Tool, Standard Duty
3M 76624, Center Adapter Gasket 6896, 7000052122, 20 EA/Case
Standard Abrasives 707308, A/O Straight Cartridge Roll, 1/2 in x 2 in x 1/8 in 60, 7100092849
Standard Abrasives 707336, A/O Straight Cartridge Roll, 3/8 in x 1-1/2 in x 1/8 in 120, 7100092850
Standard Abrasives 708462, A/O Straight Cartridge Roll, 1 in x 2 in x 1/4 in, 80, 7100102988
Standard Abrasives 714175, A/O Straight Cartridge Roll, 5/8 in x 1-1/2 in x 1/8 in 80, 7100103032
Standard Abrasives 700939, A/O Full Taper Cartridge Roll, 1/2 in x 1-1/2 in x 1/8 in 120, 7100092989
Standard Abrasives 700667, A/O Full Taper Cartridge Roll, 1/2 in x 2 in x 1/8 in 60, 7100092988
Standard Abrasives 726000, A/O C4 Straight Precision Cartridge Roll, 1 in x 2-1/2 in x 1/4 in 60, 7100098773
Dynabrade 13509 Dynastraight Finishing Tool, Rear Exhaust, 6,000 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor
Dynabrade 11486 Dynabelter Accu-Grinder Abrasive Belt Tool, Heavy-Duty
Dynabrade 64350 26" W x 36" L (660 mm W x 914 mm L) Metal Capture Downdraft Station, 230 V (AC)
Dynabrade 11476 Dynabelter Abrasive Belt Tool, Heavy-Duty
Standard Abrasives 707212, A/O Straight Cartridge Roll, 1 in x 2 in x 1/4 in, 60, 7100092848
3M 22773, Extra Heavy Duty Duct Tape 6969, Black, 48 mm x 54.8 m, 10.7 mil, 7000001232
3M 40145, Thermosetable Glass Cloth Tape 3650, White, 8.3 mil, 7 in x 60 yd, 7100198501
3M 97130, Tough Duct Tape 3955-BK, Black,1.88 in x 55 yd, 7100102256
3M 91476, Scotch Duct Tape 920-PNK-C, 1.88 in x 20 yd (48 mm x 18,2 m), Pink, 7100166668
3M 16153, PTFE Glass Cloth Tape 5451, Brown, 1 1/2 in x 36 yd, 5.6 mil, 7000050134
3M 03017, Glass Cloth Tape 361, White, 1 in x 60 yd, 6.4 mil, 7000047442
Dynabrade 95848 Dynabrade Gear Oil
3M 39057, Scotch Duct Tape 910-MMD-C, 1.88 in x 10 yd (48 mm x 9,14 m), 7100183288
3M 17227, Heavy Duty Duct Tape DT11, Silver, 48 mm x 54.8 m, 11 mil, 7100158346
3M 23713, Glass Cloth Tape 361, White, 1 in x 60 yd, 6.4 mil, 7000050071
3M 17809, All Purpose Duct Tape DT8, Black, 48 mm x 54.8 m, 8 mil, DT8IW, 7100174104
3M 81080, Red Duct Tape, 1005-RED-CD, 1.5 in x 5 yd, 7100144999
3M 91532, Scotch Duct Tape 920-GRN-C, 1.88 in x 20 yd (48 mm x 18,2 m), Green, 7100166509
3M 17295, High Temperature Aluminum Foil Glass Cloth Tape 363, Silver, 2 in x 36 yd, 7.3 mil, 7000028867
3M 98005, Pro Strength Duct Tape 1260-C 1.88 in x 60 yd (48,0 mm x 54,8 m), 7000052627
3M 10703, Scotch Varnished Cambric Tape 2510, 1-1/2 in x 36 yd, Yellow, 7000132187
3M 50012, Venture Tape Extreme Cloth Duct Tape 1557, Silver, 48 mm x 55 m (1.88 in x 60.1 yd), 7100043944
3M 15998, Venture Tape UL181B-FX Polypropylene Duct Tape 1599B, Black, 48 mm x 109.7 m, 3 mil, 7100043816
3M 85563, Heavy Duty Duct Tape 3939, Silver, 96 mm x 54.8 m, 9.0 mil, 7100022015 
