Weld-On #42 Acrylic Cement

Weld-On #42 is a two-component (10:1 ratio), reactive, high strength acrylic based adhesive that provides "museum quality" water clear joints with excellent weatherability. Specially formulated to bond acrylic, including extruded cell cast and continuous case; as well as molded parts and some cross-linked sheet. Applicator guns and mixing tips are sold separately for both the 50 ml and 230 ml cartridges.

• OPTICAL CLARITY BOND — Weld-On #42 forms a crystal-clear joint with 92% light transmission, matching acrylic's natural clarity. Ideal for display cases and signage where invisible seams are critical. Resists yellowing and maintains transparency across a -40°F to 180°F service range for long-lasting, professional-grade results.
• PROFESSIONAL STRENGTH FORMULA — Delivers 8,000 PSI tensile strength for structural, load-bearing acrylic bonds. Thin-bodied solvent cement wicks into joints by capillary action for seamless fusion welds. Compliant with ASTM D4802 standards. Designed for use on cast and extruded acrylic sheet, rod, and tube assemblies.
• VERSATILE FABRICATION APPLICATIONS — Purpose-built for fabrication shops, retail display builders, sign makers, and prototyping. Bonds acrylic components used in display cases, point-of-purchase fixtures, signage, lighting diffusers, museum exhibits, and architectural models. Compatible with laser-cut and CNC-machined acrylic parts for clean, professional assemblies.
• EASY APPLICATION & COMPATIBILITY — Apply with a needle applicator or brush-in-cap bottle along the joint edge; capillary action draws cement in for a flush weld. Works on cast and extruded acrylic. Joints reach handling strength quickly and can be machined, sanded, or polished after cure. No mixing required — ready to use straight from the container.
• PRECISION TOLERANCES & QUALITY — Dimensions held to +/- 0.010" ensuring consistent, precise fit for fabrication and engineering applications. Manufactured under ISO 9001:2015 certified quality management standards for reliable material quality on every order.