Description
Description
Weld-On 31 is amedium-speed, two-part structural acrylic adhesivedesigned for reliable bonding of metals, plastics, and composites. With a1317 minute working timeand3040 minute fixture time, it offers more flexibility than fast-curing adhesives like Weld-On 30 making it ideal for larger sign and display assemblies.
Once cured, Weld-On 31 providesexceptional durability against impact, fatigue, corrosion, and chemicals, maintaining bond integrity even in extreme temperatures from-40F to 180F (-40C to 82C).
Key Features & Benefits
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Medium-Speed Cure Longer working time for larger assemblies.
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High Strength Bonds Up to2,4002,800 psi lap shearon metals.
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Primerless Metal Bonding Bonds aluminum, CRS, stainless steel, and coated metals.
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Excellent Adhesion to Plastics PVC, ABS, acrylic (PMMA), polycarbonate.
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Composite Compatibility Strong bonds with epoxy, polyester, and vinyl ester laminates.
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Gap-Filling Capabilities Ideal for uneven surfaces.
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Non-Sag Formula Suitable for vertical and overhead bonding.
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UL 746C Approved Certified for indoor and outdoor electrical signage.
Common Applications
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Sign and display fabrication requiring medium open time
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Electrical signage assemblies (UL 746C certified)
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Bonding unprepared metals, coated metals, and composites
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Industrial manufacturing where durability and workability are critical
Technical Specifications
| Property | Value |
|---|---|
| Color | Off White |
| Mix Ratio | 10:1 |
| Working Time | 1317 minutes |
| Fixture Time | 3040 minutes |
| Ultimate Bond Strength | 24 hours |
| Lap Shear Strength (Aluminum) | 2,400 psi (16.5 MPa) |
| Lap Shear Strength (Cold Rolled Steel) | 2,550 psi (17.6 MPa) |
| Lap Shear Strength (Stainless Steel) | 2,150 psi (14.8 MPa) |
| Lap Shear Strength (Carbon Fiber Epoxy) | 2,800 psi (19.3 MPa) |
| Service Temperature | -40F to 180F (-40C to 82C) |
| Shelf Life | 6 months |
Packaging & Ordering Info
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Cartridge Size:490ml
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Case Quantity: 12
Dispensing guns and mixing tips sold separately.
Call to Action
For sign and display projects that requiremore working time without compromising strength, Weld-On 31 is the adhesive of choice.






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