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 35826, Hookit Dust Extraction Flexible Sanding Block, 178 mm x 67 mm, 7100256500
Dynabrade 60052 .1 hp Straight-Line Quick-Change Pencil Grinder, Rear Exhaust, 35,000 RPM, 3/32" Collet
3M™ 17323, Versaflo™ Respiratory Helmet Assembly M-407, with Premium Visor and Flame Resistant Shroud, 7000002395, 1 EA/Case
3M™ 07011, Supplied Air Respirator Hose W-9435-50/07011(AAD), 7000005373, 1 EA/Case
3M 77559, Cubitron II Hookit Cloth Disc 784F, 77559, 36+ to 120+, 5 in x NH, Die 500X, 7100232738
3M 09413, Scotch-Brite Contour Surface Paint and Varnish Remover 9413NA, 7000052005
3M™ 72787, Calibration Kit 529-04-48, Large, 7000052154, 1 EA/Case
3M 76783, Cubitron II Hookit Cloth Disc 784F, 120+ XF-weight, 5 in x NH, Die 500X, 7100222757
Dynabrade 10690 Filter/Regulator/Lubricator, FRL40, 1/2" NPTAssy.
3M 51033, Roloc Disc 361F, 36 YF-weight, TSM, 3 in, Die RS300VM, 7000148150
Dynabrade 94980 1/4" Composite-Style Coupler, 1/4" Male
3M 01333, PSA Cloth Disc 348D, 60 X-weight, 3 in x NH, Die 300V, 7000118880
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
Dynabrade 14360 Pneumatic Pipe Belt Finisher
3M 04028, Scotch-Brite Hand Pad 7448, HP-HP, SiC Ultra Fine, Gray, 6 in x 9 in, 7100089226, 60/case
Dynabrade 10295 Screen
3M™ 17379, Versaflo™ Length Adjusting Breathing Tube BT-30, 7100009685, 1 EA/Case
3M™ 72010, Replacement Filter Kit 523-01-29, 7000056891, 1 EA/Case
3M 07959, Sanding Screen, 100 Grit, 7-7/8 in x 3/16 in, 7100160279
Dynabrade 11476 Dynabelter Abrasive Belt Tool, Heavy-Duty
3M 47182, Polyurethane Adhesive Sealant 550FC Fast Cure, Gray, 600 mL Sausage Pack, 7100197990, 12/Case 
