UltraLok® 421GB Structural MMA Adhesive

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Color
Size
SKU: CS_CCA-UL421GB-50S
$27.00 CAD
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SKU

  • Type Methacrylate Adhesive
  • Vendor Chem-Set
  • SKU CS_CCA-UL421GB-50S
Description Popular Uses, Popular Applications Need Datasheets?

Description

UltraLok® 421GB is a medium-set, two-part structural methacrylate adhesive designed for bonding metals, plastics, and composites with excellent strength and durability. Featuring an 8–12 minute open time, it offers installers and assemblers flexibility for proper alignment and positioning.

With built-in glass beads for bondline control and minimal surface preparation required, UltraLok 421GB is an ideal drop-in replacement for ASI MP 55320, 3M™ Scotch-Weld DP8410NS, and SciGrip SG300-15, offering comparable performance at a more economical price.

See It in Action

Key Features and Benefits

  • Medium Open Time: 8–12 minutes allows flexible assembly and repositioning

  • Glass Beads: Ensure consistent bond thickness and reduce clamp distortion

  • High Strength Performance: 2,500–3,500 psi tensile on metal and composites

  • Vibration & Weather Resistant: Engineered for real-world environmental stress

  • No Surface Prep Required: Bonds through oils and light surface residues

  • Tack-Free Finish: Enables clean sanding and secondary operations

  • Color Options: Grey, Black, and Natural

  • Application Flexibility: Cartridge or bulk dispensing formats

  • Made in the USA

Common Applications

  • Metal and plastic enclosure bonding

  • Equipment and appliance assembly

  • Signage and structural panel lamination

  • Transportation, trailer, and RV manufacturing

  • HVAC ducting and cabinet construction

  • Thermoplastic bonding in consumer and industrial products

Technical Specifications

Property Value
Mix Ratio (by volume) 10:1
Open/Working Time 8–12 minutes
Fixture Time 20–30 minutes
Tensile Strength 2,500–3,500 psi
Shear Strength >2,500 psi
Temperature Resistance -40°F to +250°F
Gap Fill Up to 0.25 inches
Mixed Viscosity 70,000–90,000 cps
Mixed Density 8.1 lbs/gal (0.96 g/cc)
Available Colors Grey, Black, Natural
Packaging Sizes 50ml, 250ml, 500ml, pails, drums
Shelf Life 12 months at room temp (77°F)
Cure Profile Room temperature
Surface Prep Not required
Flash Point 51°F (11°C)

Ultralok 400 Series Comparison Chart

Product Open Time Fixture Time Recommended Use Colors Available Sizes
Ultralok 420GB 3–7 min 9–15 min Fast assembly, metal & plastic Grey, Black, Natural 50ml, 250ml, 500ml, pails, drums
Ultralok 421GB 8–12 min 20–30 min Medium cure for positioning Grey, Black, Natural 50ml, 250ml, 500ml, pails, drums
Ultralok 422GB 18–24 min 30–45 min Large parts, high-temp environments Grey, Black, Natural 50ml, 250ml, 500ml, pails, drums

Compatible Substrates

Metals:

  • Aluminum

  • Steel

  • Stainless steel

  • Coated and e-coated metals

Thermosets:

  • Fiberglass

  • Gel coats

  • Epoxies

  • Phenolics

  • Polyurethanes

Thermoplastics:

  • ABS

  • PVC

  • Acrylic

  • Polycarbonate

  • Nylon

  • PPO

  • Styrene

  • PBT/PET blends