Product Introduction
3M™ Scotch-Weld™ Urethane Adhesive EC-3532 B/A is a fast-acting, two-part urethane adhesive that cures at room temperature or with heat to form tough, impact-resistant structural bonds. This adhesive provides strong adhesion on metals, plastics, composites, and many primed or painted metal and plastic substrates. It becomes non-sag approximately 30 seconds after mixing, making it easier to handle and apply in various industrial processes.
3M™ Scotch-Weld™ Urethane Adhesive EC-3532 B/A is engineered for sag resistance after approximately 30 seconds of mixing, preventing it from running, dripping, or migrating during application. Its 5-15 minute work life allows ample time for positioning and adjustment before curing begins. The adhesive cures in 24 hours at room temperature or faster with heat, giving users flexibility to control curing speed. It can be applied using a spatula, trowel, or flow equipment to suit various application needs.
Urethane adhesives, such as EC-3532 B/A, are valued for their flexibility once cured. Two-part urethane adhesives consist of an isocyanate component (hardener) and a polyol or resin component, which react upon mixing to cure more quickly than moisture-cure systems and without depth of cure limitations.
These adhesives work well on common substrates including wood, metals, rubbers, cured epoxy, leather, tile, glass, plastics, and concrete. Their chemical versatility allows them to deliver a range of properties—rigid or flexible, dense or lightweight—while maintaining bond integrity under varying conditions such as temperature changes, moisture, and chemical exposure.
Using structural adhesives like 3M™ Scotch-Weld™ Urethane Adhesive EC-3532 B/A provides multiple advantages:
- Eliminates the need for mechanical fasteners, such as drilling holes
- Joins dissimilar materials and works well with many surfaces
- Produces aesthetically pleasing results without additional refinishing
- Offers strong resistance to environmental and chemical exposures
- Excellent temperature and solvent resistance
- No need for air or moisture exposure to cure; supports unlimited depth of cure
Overlap Shear Strength – Metals:
| Substrate | -40°F (-40°C) | 75°F (24°C) | 180°F (82°C) |
|---|---|---|---|
| Etched Aluminum | 2500 | 2000 | 300 |
| Abraded and Solvent Wiped Aluminum | 2000 | 2000 | 300 |
| Solvent Wiped Aluminum | 1000 | 1000 | 100 |
| Abraded and Solvent Wiped Steel | 2000 | 1200 | 100 |
| Solvent Wiped Steel | 1000 | 700 | 20 |
3M™ Scotch-Weld™ Urethane Adhesive EC-3532 B/A Features
- Two-component, urethane adhesive cures at room temperature for convenient, easy use
- Strong, impact-resistant structural bonds meet tough specifications and requirements
- Excellent adhesion to many primed or painted metal and plastic substrates minimizes prep
- Designed to develop sag resistance approximately 30 seconds after mixing to keep processes moving
- 5-15 minute work life and 24-hour cure time provide fast results
3M™ Scotch-Weld™ Urethane Adhesive EC-3532 B/A Applications
- Structural bonding of metals, plastics, and composites
- Bonding primed or painted metal and plastic substrates
- High-impact applications requiring tough, durable bonds
- Aerospace interior bonding and industrial structural bonding
- Applications requiring flexible working time and fast cure at room temperature or with heat
About Prostech
Prostech offers specialty materials (adhesives, tapes, thermal interface materials, insulating materials, sealants, PCB protection materials, …) along with manufacturing solutions. We proudly serve a wide range of industries and are an authorized distributor for leading global manufacturers of industrial materials and equipment. Our product range is designed to deliver customized solutions that address each customer’s unique needs.
With years of experience and a successful project history, we are confident in our ability to provide comprehensive material solutions. These solutions effectively tackle the challenges manufacturers face. To explore our full product catalog, simply click here. Our dedicated team is ready to assist with:
- Provide quotation, sample, TDS/MSDS, and technical consultation
- Testing sample quality and verifying product compatibility in our laboratory
- Customizing material formulas for special applications
- Adapting product sizes, quantities, and packaging to meet specific needs
- Offering expert advice on suitable equipment and automation processes
- Delivering technical training and on-site support for optimal product use
Moreover, Prostech ensures the safe and accurate global delivery of all materials, including “dangerous goods”, in compliance with legal regulations. For personalized technical support or to receive a quotation, please contact us today.
| Property | Value |
|---|---|
| Adhesive Type | Urethane |
| Container Size (Imperial) | 1 qt, 4 fl oz |
| Container Size (Metric) | 0.95 L, 118.29 mL |
| Cure Rate | 24 hr |
| Cure Temperature | Room Temperature |
| Density | 1.31 g/cc |
| Factory ISO Certification | No ISO Certification information available |
| Time to Handling Strength | 4 hr, 3-4 Hours |
| Volume (Imperial) | 10 gal |
| Volume (Metric) | 37.854 L |
| Work Life | 5 min – 15 min |
