Description
Methacrylate Structural Adhesive with Built-In Spacer Shim
Chem-Set UltraLok 3121 is a two-component methacrylate structural adhesive engineered to transfer high loads and distribute stress evenly across a bonded joint. A built-in spacer shim, 0.030 inch thick, holds a consistent bond line across the full joint so clamping pressure does not squeeze the adhesive down to an uneven, weak-spot thickness.
Why Fabricators Choose This Methacrylate Structural Adhesive
UL3121 bonds a wide range of substrates, including many metals, composites, and plastics, without surface separation or a separate priming step in most applications. That cuts prep time compared to epoxy systems that demand more aggressive surface treatment before bonding will hold. The formula sets and cures rapidly at room temperature, which keeps parts moving through a fabrication line instead of sitting in fixtures waiting on cure.
Performance of This Methacrylate Structural Adhesive
Beyond high strength and fast cure, UL3121 delivers high elongation and ductility along with strong damping properties, so bonded joints flex and absorb shock rather than propagating a crack the way a rigid, brittle bond line would under repeated stress or impact. Aerospace, marine, metal fabrication, sign and display, and transportation and specialty vehicle shops use this UltraLok family where a mechanical fastener would add weight, drill through a finished surface, or simply cannot reach the joint geometry.
Specifications
| Chemistry | Two-component methacrylate (MMA) |
|---|---|
| Spacer shim | 0.030 in built-in |
| Cure | Rapid cure at room temperature |
| Surface prep | Bonds many substrates without priming |
| Key properties | High strength, high elongation, high ductility, damping |
Because the shim eliminates the guesswork of clamp pressure, the same joint gets a repeatable bond line from the first unit to the last one off the line, which matters on production runs where inconsistent adhesive thickness would otherwise show up as scattered strength test results. Chemical Concepts carries the full UltraLok line in our acrylic adhesives category, including other UltraLok sizes and formulations. For mixing, dispensing, and application demonstrations, see the Chemical Concepts YouTube channel. Questions on substrate compatibility or cartridge sizing can go to (800) 220-1966 or [email protected].
Reviews
There are no reviews yet.