SikaFast 3121 Impact Resistant Methacrylate Structural Adhesive

SikaFast 3121 Methacrylate Structural Adhesive Overview

SikaFast 3121 is a two-component, fast-curing structural acrylic adhesive utilizing methyl methacrylate (MMA) technology, with a 10:1 mix ratio, designed for high-strength bonding applications that require quick fixturing. Supplied in 50 mL (1.69 fl. oz) and 490 mL (16.5 fl. oz) cartridges, it features an open time of 5 minutes, allowing for efficient assembly in high-throughput production processes. This adhesive efficiently handles high loads, ensuring strong, reliable bonds on various substrates, such as metals and fiber-reinforced polymers. SikaFast 3121 can replace or complement mechanical fasteners like rivets or screws and offers excellent flexibility, making it suitable for applications where durability and impact resistance are critical.

SikaFast 3121 Features and Benefits

• Fast Curing: Strength develops within minutes, perfect for high-throughput applications
  
• Excellent Adhesion: Bonds effectively to metals, polymers, and composites, even with limited surface prep
  
• High Flexibility: Superior flexibility at low temperatures, ensuring durability in demanding environments
  
• Impact Resistant: Provides good strength and impact resistance under stress
  
• Mix Ratio 10:1: Ensures consistent application through static mixers

Specifications

• Series: SikaFast 3121
  
• Type: Acrylic Structural Adhesive
  
• Chemistry: Methyl Methacrylate
  
• Application: Bonding
  
• Substrates: A Variety of Substrates, Including Aluminum, Stainless or Galvanized Steel, and Fiber Reinforced Polymers
  
• Color (Mixed): Dark Gray, Straw
  
• Cure Mechanism: Radical Polymerization
  
• Cartridge Size: 50 mL (1.69 fl. oz) and 490 mL (16.5 fl. oz)
  
• Density (Mixed): 8.3 lb/gal (0.99 kg/l)
  
• Mix Ratio: 10:1
  
• Consistency: Thixotropic Paste
  
• Application Temperature: 50°F to 95°F (10°C to 35°C)
  
• Open Time: 5 Minutes
  
• Peak Exotherm Time / Temperature: 10 Minutes / 195°F (90°C)
  
• Shore D Hardness: 65
  
• Tensile Strength: 1,300 psi (9 MPa)
  
• Elongation at Break: 80%
  
• E-Modulus: 14,500 psi (100 MPa)
  
• Tensile Lap-Shear Strength: 1,500 psi (10.5 MPa)
  
• Service Temperature: -22°F to 176°F (-30°C to 80°C)
  
• Shelf Life: 9 Months
  
• Storage Temperature: Below 72°F (22°C) - Protect from Direct Sun Light
  

Applications

SikaFast 3121 is perfect for fast bonding and securing concealed joints. It replaces or complements mechanical fasteners like rivets or screws and bonds well to metals and reinforced polymers, making it ideal for high-strength applications in automotive, industrial, and construction settings.

Other SikaFast 3121 Sizes Available

• SikaFast 3121 45 Gallon Drums and 4.5 Gallon Pails