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™ 72010, Replacement Filter Kit 523-01-29, 7000056891, 1 EA/Case
Norton 66254432925 Wheel, 3" X 1/2" X 1/4" Bear-Tex, Rapid Blend, Non-Woven 5 Density, A/O, M Grit, 20 Each
3M 49456, EMI Aluminum Foil Shielding Tape 1170, 2 in x 18 yd, 1170-2"X18YD, 7000132702
3M 27199, Foil Repair Tape 3311-10D, 2.0 in x 10 yd (50.8 mm x 9,1 m), 7100198304
3M 20272, Neoprene Contact Adhesive 10, Light Yellow, 1 Quart Can, 7100011456, 12/case
3M 22407, Roloc Disc 361F, 80 YF-weight, TR, 1-1/2 in, Die R150S, 7000045099
3M 29831, Sanding Screen, 180 Grit, 18 in x NH, 7100160238
Dynabrade 78424 4-1/2" Dia. x 3/8" Medium DynaBrite Surface Conditioning Disc, 25/pack
3M 24028, Ultra-Thin Water Contact Indicator Tape 5559, 12 In x 180 Yd, 1 Roll/Case, 7000001338
3M 13373, Scotch-Brite Star, 4 in A CRS LS, 7000120968
3M 53914, Performance Plus Duct Tape 8979N Nuclear Red, 48 mm x 54.8 m 12.1 mil, 7000049014, 24/ case
Dynabrade 64350 26" W x 36" L (660 mm W x 914 mm L) Metal Capture Downdraft Station, 230 V (AC)
Standard Abrasives 827600, Buff and Blend GP Power Pad, 6 in x 9 in, A VFN, 7010330610, 50 ea/Case
3M™ 72013, Adapter 529-04-50, 110-120 VAC, 7000131705, 1 EA/Case
Dynabrade 51812 .1 hp Straight-Line Pencil Grinder, Rear Exhaust, 1000,000 RPM, 3/32" Collet
3M 98235, Pro Strength Duct Tape 1210-A 1.88 in x 10 yd (48.0 mm x 9.14 m), 7000029903
3M Scotchkote Liquid Epoxy Coating Spray System HSS Mix Nozzle,Straight, 7000031879
3M 29847, Sanding Screen, 60 grit 16 x NH, 7100160824
3M 17071, Versaflo Headcover with Integrated Head Suspension, S-133L-5, White, Medium/Large, 7000127428, 5 EA/Case
3M™ 07010, Supplied Air Respirator Hose W-9435-25/07010(AAD), 25 ft, 3/8 in ID, Industrial Interchange Fittings, High Pressure, 7000005374, 1 EA/Case
3M 05579, Cloth Belt 577F, 80 YF-weight, 2 in x 48 in, Film-lok, Single-flex, 7010308379, 50 per case
3M 47198, Polyurethane Sealant 540, Gray, 400 mL Sausage Pack, 7100198006, 12/Case 
