Creates Flexible Seals on Expansion Joints
3Mâ„¢ 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 13670, Stikit Paper Disc Roll 363I, 5 in x NH, 5 Hole, 80 F-weight, D/F, Die 500FH, 7010298815, 100 discs per roll
3M 31471, Cubitron II Hookit Clean Sanding Abrasive Disc, 5 in, 220+ grade, 7100155365, 50 discs per carton
3M 05907, Polyolefin Adhesion Promoter, 05907, 12 oz Net Wt, 7100198814
3M 31375, Cubitron II Hookit Clean Sanding Abrasive Disc, 8 in, 40+ grade, 7100073547, 25 discs per carton
Dynabrade 11074 Contact Wheel Ass'y, 5/8" Dia. x 1/8" W x 3/8" I.D., Crown Face, 70 Duro Rubber
ACS Diamond Cloth Belt, CX1250 3/8" X 24" 75U
3M 31666, Cubitron II Net Disc Roll, 120+, 5 in, 7100250147, 50 Discs/Roll
3M 87179, Scotch-Weld Epoxy Adhesive 2216NS, Tan, Part B, 5 Gallon Drum (Pail), 7010309882
ACS CX1250 Diamond Belt, 1/2" X 24" 125u
3M 41595, Polyurethane Sealant 540, Black, 310 mL Cartridge, 7100001804, 12/Case
3M 21463, Marine Adhesive Sealant 5200, White, 5 Gallon Drum (Pail), 7010325698
Dynabrade 11332 Contact Wheel Ass'y, 1/4" Dia. x 3/8" W x 3/16" I.D., Crown Face, Steel
3M 76783, Cubitron II Hookit Cloth Disc 784F, 120+ XF-weight, 5 in x NH, Die 500X, 7100222757
3M 08023, Adhesive Sealant 740 UV, White, 600 mL Sausage Pack, 7000000933, 12/Case
3M 47204, Polyurethane Adhesive Sealant 560, Black, 600 mL Sausage Pack, 7100198012, 12/Case
3M 16578, Accuspray ONE Spray Gun Kit, 7100096182
3M 47182, Polyurethane Adhesive Sealant 550FC Fast Cure, Gray, 600 mL Sausage Pack, 7100197990, 12/Case 
