Product Data Sheet

SikaFast®-3351 is a two-component methyl methacrylate (MMA) structural adhesive engineered for high-strength bonding applications that require extended working time and durable performance. Its toughened adhesive formulation combines long open time with rapid strength development, making it ideal for larger assemblies, complex positioning, and demanding industrial manufacturing environments.

Designed to replace or reduce the need for welding, riveting, and other mechanical fastening methods, SikaFast®-3351 bonds effectively to a wide range of substrates including metals, plastics, composites, coated materials, and topcoats with little or no surface preparation in many applications. Its flexible structural performance helps distribute stress evenly while maintaining excellent impact, peel, and shear resistance.

The adhesive features a thixotropic, non-sagging consistency that allows for clean and precise application on vertical and horizontal surfaces. Its extended working time supports larger panel bonding, transportation assembly, industrial fabrication, and composite manufacturing processes where additional alignment time is needed before curing.

SikaFast®-3351 cures through free radical polymerization and delivers durable long-term performance with strong resistance to weathering, water, dilute acids, bases, mineral oils, and certain hydrocarbons. The adhesive is suitable for transportation, industrial equipment, agricultural machinery, and exterior bonding applications exposed to vibration, movement, and environmental stress.

Its weather-resistant formulation and excellent adhesion characteristics make SikaFast®-3351 a dependable solution for manufacturers seeking strong structural bonds with flexible processing time and reliable long-term durability.

Key Features

• Two-component MMA structural adhesive
• Extended open time for large or complex assemblies
• High-strength bonding for metals, plastics, and composites
• Excellent impact, peel, and shear resistance
• Non-sagging, thixotropic formulation for precise application
• Minimal surface preparation required in many applications
• Designed to replace welding, riveting, and mechanical fasteners
• Weather-resistant and durable formulation
• Suitable for transportation, industrial, and composite manufacturing
• Good resistance to water, oils, dilute acids, and bases