3M™ Scotch-Weld™ Urethane Adhesives 3549 is a two-part, polyurethane adhesive that provides excellent adhesion to many primed or painted metal and plastic substrates. This urethane creates tough structural bonds as well as achieve high peel strength, offering long-term durability for a variety of applications, including metal, wood and composites.
Polyurethane adhesive that forms tough structural bonds
Provides high peel strength for long-term durability
Formulated to be impact-resistant, creating a tough and durable bond
Designed to be a sag-resistant urethane adhesive for accurate application
Longer work-life offers time for proper application and adjustment
Provides excellent adhesion to many primed or painted metal and plastic substrates
Designed for Impact
3M™ Scotch-Weld™ Urethane Adhesives 3549 is resilient to impact, providing a strong bond capable of withstanding shocks and collisions. Our urethane adhesive is also constructed to resist sagging approximately 30 seconds after mixing. Its non-sagging feature allows for more precise handling and accurate application. 3M™ Scotch-Weld™ Urethane Adhesives 3549 cures at room temperature or with heat. This option gives you control over how quickly a bond establishes a certain level of shear strength. At room temperature, Scotch-Weld™ Urethane Adhesives 3549 reaches handling strength in 7 days. Upon application, its 60-minute work-life presents flexibility and provides ample time for adjustment and positioning to achieve optimum results.
Recommended Applications 3M™ Scotch-Weld™ Urethane Adhesives 3549 (PDF, 21 Kb) may be applied with a spatula, trowel or flow equipment. Used in a wide variety of industries, this urethane adhesive works for the following applications:
What to Know About Urethane Adhesives
Polyurethanes are a class of polymers generally noted for their flexibility when cured. Two part polyurethane adhesives comprise two independent formulations designed to be mixed, much like an epoxy adhesive. The isocyanate stream, generally the accelerator or hardener side, reacts with the polyol or resin side. These two components will react when mixed, curing more quickly than one-part, moisture cure polyurethane systems, and with no depth of cure issues.
Cure at room temperature or with heat to form tough, impact-resistant structural bonds
Urethane adhesives will work on most common materials such as wood, metals, rubbers, cured epoxy, leather, tile and glass, many plastics, concrete and more. The versatility of urethane adhesives comes from its chemical recipe; different chemical combinations result in different properties that produce different levels of stiffness, density, flexibility or hardness. They can cure to a solid and be relatively rigid, or cure to a semi-hardened state and remain flexible to meet a wide range of requirements. In either finished state, urethane adhesives will maintain bond strength integrity through variable environmental factors such as temperature, moisture and chemical exposure.
The Benefits of Using a Structural Adhesive
Utilizing a structural adhesive like 3M™ Scotch-Weld™ Urethane Adhesives 3549 comes with several advantages, such as:
Eliminates the need to damage surfaces (i.e. drilling holes)
Joins dissimilar materials and works well with many surfaces
Provides aesthetically pleasing results as refinishing steps are not required
Offers the highest load bearing capability
Good environmental and chemical resistance
Delivers excellent temperature and solvent resistance
Does not need access to air or moisture to dry and therefore has an unlimited depth of cure
Made to Meet the Challenge
As a polyurethane adhesive, our Scotch-Weld™ Urethane Adhesives 3549 delivers the tough structural bonds that you need. This urethane adhesive is flexible and resistant to impact, in order to provide excellent solutions for a wide range of challenging bonding applications.
7 Days @ 72 F (22 C)
Construction, Military & Government, General Industrial, MRO, Woodworking