Product Data Sheet

SikaFast®-3341 is a high-performance two-component methyl methacrylate (MMA) structural adhesive engineered for demanding industrial and transportation bonding applications. Designed with an extended open time, this toughened adhesive allows additional positioning and assembly time for larger or more complex bonding projects while still delivering strong structural performance and long-term durability.

Its thixotropic, non-sagging formulation enables clean and precise application on both vertical and horizontal surfaces, making it ideal for manufacturing, transportation, composite fabrication, and industrial assembly environments. SikaFast®-3341 bonds effectively to a wide range of substrates including metals, plastics, composites, painted surfaces, and coated materials with little or no surface preparation required in many applications.

SikaFast®-3341 is designed to replace or supplement traditional mechanical fastening methods such as welding, riveting, and screws. Its flexible structural formulation provides excellent impact, peel, and shear resistance while helping distribute stress evenly across bonded assemblies. This combination of strength and flexibility makes it well suited for applications exposed to vibration, movement, and dynamic loading conditions.

The adhesive cures through free radical polymerization and offers rapid strength development while maintaining a longer working window than many standard structural adhesives. Its extended working time supports larger panel bonding, complex assemblies, and applications requiring additional alignment before curing begins.

SikaFast®-3341 is commonly used in transportation, industrial fabrication, agricultural equipment, and composite manufacturing where durable structural bonding and efficient assembly processes are critical.

Key Features

• Two-component MMA structural adhesive
• Extended open time for larger assemblies and positioning
• High-strength structural bonding performance
• Excellent adhesion to metals, plastics, composites, and coated surfaces
• Non-sagging, thixotropic formulation for precise application
• Good impact, peel, and shear resistance
• Helps replace welding, riveting, and mechanical fasteners
• Minimal surface preparation required in many applications
• Suitable for transportation, industrial, and composite bonding applications
• Flexible formulation for vibration and dynamic load resistance