Weld-On® 31 Structural Acrylic Adhesive

Description

Weld-On® 31 is a medium-speed, two-part structural acrylic adhesive designed for reliable bonding of metals, plastics, and composites. With a 13–17 minute working time and 30–40 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 provides exceptional durability against impact, fatigue, corrosion, and chemicals, maintaining bond integrity even in extreme temperatures from -40°F to 180°F (-40°C to 82°C).

Key Features & Benefits

• Medium-Speed Cure – Longer working time for larger assemblies.

• High Strength Bonds – Up to 2,400–2,800 psi lap shear on metals.

• Primerless Metal Bonding – Bonds aluminum, CRS, stainless steel, and coated metals.

• Excellent Adhesion to Plastics – PVC, ABS, acrylic (PMMA), polycarbonate.

• Composite Compatibility – Strong bonds with epoxy, polyester, and vinyl ester laminates.

• Gap-Filling Capabilities – Ideal for uneven surfaces.

• Non-Sag Formula – Suitable for vertical and overhead bonding.

• UL 746C Approved – Certified for indoor and outdoor electrical signage.

Common Applications

• Sign and display fabrication requiring medium open time

• Electrical signage assemblies (UL 746C certified)

• Bonding unprepared metals, coated metals, and composites

• Industrial manufacturing where durability and workability are critical

Technical Specifications

Packaging & Ordering Info

• Cartridge Size: 490ml

• Case Quantity: 12

• Stock #: 31125

Dispensing guns and mixing tips sold separately.

Call to Action

For sign and display projects that require more working time without compromising strength, Weld-On® 31 is the adhesive of choice.

📞 Call (800) 220-1966 or request a quote online.

👉 See more options in our Structural Acrylic Adhesives Collection