Product Introduction
3M™ Scotch-Weld™ Urethane Adhesive EC-3549 B/A is a two-part urethane adhesive that delivers excellent adhesion to a wide variety of primed or painted metal and plastic substrates. This urethane adhesive creates durable structural bonds and achieves high peel strength for long-term performance across different applications, such as metals, wood, and composites.
Designed for impact-resistance, 3M™ Scotch-Weld™ Urethane Adhesive EC-3549 B/A withstands shocks and collisions, offering a tough and strong bond. Its sag-resistant formula prevents dripping or running approximately 30 seconds after mixing, ensuring accurate application. The adhesive can cure at room temperature or with heat, allowing flexibility in bonding speed. It reaches handling strength in seven days at room temperature, and its 60-minute work-life allows ample time for precise positioning and adjustment.
Urethane adhesives, such as 3M™ Scotch-Weld™ Urethane Adhesive EC-3549 B/A, belong to a family of polymers known for their flexibility after curing. These two-part adhesives consist of an isocyanate (hardener) and a polyol (resin), which react upon mixing. This leads to faster curing than traditional one-part, moisture-curing polyurethanes, with no depth of cure issues.
Urethane adhesives are compatible with a wide range of materials including wood, metals, rubbers, cured epoxy, leather, tile, glass, many plastics, and concrete. Their chemical versatility enables them to be tailored for varying levels of stiffness, density, flexibility, or hardness. Whether curing to a rigid or semi-flexible state, urethane adhesives retain bond strength under challenging environmental conditions such as temperature fluctuations, moisture, and chemical exposure.
Using structural adhesives like 3M™ Scotch-Weld™ Urethane Adhesive EC-3549 B/A offers several benefits:
- Eliminates the need to damage surfaces (e.g., drilling holes)
- Efficiently joins dissimilar materials and works on various substrates
- Ensures a clean appearance without requiring refinishing
- Provides strong resistance to environmental and chemical stresses
- Delivers excellent performance under high temperature and solvent conditions
- Cures without requiring air or moisture, offering unlimited depth of cure
Urethane Adhesive EC-3549 B/A Features
- High peel strength for exceptional long-term durability
- Impact-resistant formulation for a tough, resilient bond
- Sag-resistant urethane adhesive for precise and accurate application
- Extended work-life allows time for proper placement and adjustment
Urethane Adhesive EC-3549 B/A Applications
- Metal bonding, including aluminum and steel substrates
- Wood bonding for structural and non-structural assemblies
- Composite material bonding in various industries
- Plastic bonding for automotive and industrial components
- Applications requiring resistance to environmental and chemical stresses
Overlap Shear Strength – Metals
| Substrate | Test Temperature | -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 |
All values are reported in psi (pounds per square inch) for overlap shear strength under specified temperatures.
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 fl oz, 1.64 qt, 4 fl oz, 6.76 fl oz |
| Container Size (Metric) | 0.95 mL, 48.5 L, 118.29 mL, 200 mL |
| Cure Rate | 7 days |
| Cure Temperature | Room Temperature |
| Density | 1.31 g/cc |
| Factory ISO Certification | No ISO Certification information available |
| Percent Volatile | <0.5 % |
| Product Form | Cartridge |
