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.

3M 26003, PPS Series 2.0 Adapter, Type S2c, 16 mm Female, 1.5 mmThread, 7100135338
Dynabrade 18426 Vane Set (4pk)
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
3M 26024, PPS Series 2.0 Spray Cup System Kit, Large (28 fl oz, 850mL), 200 Micron Filter, 7100134650
3M 29830, Sanding Screen, 60 Grit, 19 in x NH, 7100160131
3M 76783, Cubitron II Hookit Cloth Disc 784F, 120+ XF-weight, 5 in x NH, Die 500X, 7100222757
3M 94700, Cubitron ll Cloth Belt 947A, 60+ X-weight, 1/4 in x 24 in, Fabri-lok, Single-flex, 7010360589, 200 per case
Air Turbine Tools 310RSV - 6mm Router Hand Tool Series with Brake, 40,000RPM, 33445
3M 20230, Scotch-Seal Metal Sealant 2084, Silver, 5 Gallon Drum (Pail), 7000046344
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
ACS Diamond Cloth Belt, CX1250 1/2" X 18" 125U
3M™ 72787, Calibration Kit 529-04-48, Large, 7000052154, 1 EA/Case
Dynabrade 96101 Dynabrade Air Lube 10W/NR 24 Per Box
3M™ 94275, Versaflo™ Gold Coated Tinted Over-Visor with UV/IR Protection M-967N, 70071696879, 1 EA/Case
ACS CX1250 Diamond Belt, 1/2" X 24" 125u
3M 69457, Cloth Belt 777F, 60 YF-weight, 1/2 in x 12 in, Fabri-lok, Single-flex, 7010299175, 200 per case
3M™ 07012, Supplied Air Hose W-9435-100/07012(AAD), 100 ft, 3/8 in ID, Industrial Interchange Fittings, High Pressure, 7000005375, 1 EA/Case
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 33349, 641WY 1/4" X 24", 220 Mesh Diamond Cloth Belt, 7010534919
3M 29611, 641WY 1/4" X 24", 100 Mesh Diamond Cloth Belt, 7010534832
3M 83539, Scotch Heavy Duty Packaging Tape Dispenser ST-181, Foam Handle with Retractable Blade, 7100288393
3M 45203, Stikit Sanding Block, 2-1/2 in, 7000028350
3M 07958, Sanding Screen, 80 Grit, 7-7/8 in x 3/16 in, 7100160277
Standard Abrasives 840038, Quick Change Surface Conditioning GP Disc, A/O Medium, TSM, Maroon, 3/4 in, QS75KM, 7000121647, 50/case
3M 65086, Scotch-Brite Diamond Wheel, 6" x 1" x 1" 645DC, 7010329878
3M 14593, Scotch-Brite Cut and Polish Disc, 3" x 1-1/4" x 1/4" A Medium, D5, 7000045941, Box of 10
Dynabrade 78425 4-1/2" Dia. x 3/8" Coarse DynaBrite Surface Conditioning Disc, 25/pack
3M 20932, PSA Cloth Disc 348D, 80 X-weight, 1 in x NH, Die 100N, 7000118914
3M™ 07011, Supplied Air Respirator Hose W-9435-50/07011(AAD), 7000005373, 1 EA/Case
3M 22404, Roloc Disc 361F, 80 YF-weight, TR, 3 in, Die R300V, 7000045100
3M 14316, Marine Adhesive Sealant 4000 UV, Black, 295 mL Cartridge, 7010367955, 12/Case
3M 69602, Cloth Belt 777F, 60 YF-weight, 1 in x 11 in, Sine-lok, Full-flex, 7010295223, 500 per case
3M™ 72016, Remote Alarm & Strobe 529-05-20, Audible, 7000131708, 1 EA/Case
3M 16831, Urethane Seam Sealer, 08361, Gray, 310 mL Foil Pack, 7000120461, 6 per case 
