Description
LORD® Signlok™ 406 is a high-strength, two-part structural acrylic adhesive designed for bonding a wide range of prepared or unprepared metals and engineered plastics. With its medium work time and excellent durability, it’s an ideal choice for fabricators looking to eliminate welding, riveting, or mechanical fastening.
This 210ml cartridge version is part of the Signlok 400 series cartridge line, alongside Signlok 403, 810, and 7550—all of which use the same NEW-3-203-XSP manual dispensing gun and MCQ 08-24T mixing tip for streamlined application across jobs.
Signlok 406 is also available in an industrial-grade version (Lord 406/19), offered in 50ml, 404ml CX, and 415ml cartridges.
Key Features & Benefits
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Medium Work Time (6–10 min): Ideal for structural bonding with flexible processing window
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High Mechanical Strength: Lap shear strength up to 2,300 psi on steel; peel strength 20–23 pli on aluminum
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Durable & Temperature Resistant: Withstands -40°F to +300°F service environments
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UL Certified: UL 746C recognized for sign assemblies (E225855, MH26317)
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Non-Sag Vertical Use: Won’t drip or slump during vertical or overhead application
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Glass Bead Reinforcement: Maintains consistent bondline thickness for optimal strength and waste reduction
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Long Shelf Life: 18 months in unopened containers under 80°F storage
Common Applications
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Channel letter and lightbox assembly
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ACM and metal panel fabrication
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Sign frame and corner key bonding
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Bond-and-seal in one step for light blocking
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Welding replacement in metal fabrication
Technical Specifications
| Property | Value |
|---|---|
| Work Time | 6–10 minutes |
| Handling Strength | 12–17 minutes |
| Full Cure Time | 24 hours |
| Mix Ratio | 2:1 |
| Color (Mixed) | Tan |
| Lap Shear Strength (Steel) | 2,300 psi (15.86 MPa) |
| Peel Strength (Aluminum) | 20–23 pli (3.5–4.0 N/mm) |
| Temp Range | -40°F to +300°F (-40°C to +149°C) |
| Shelf Life | 18 months (sealed, <80°F storage) |
Compliance & Certifications
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UL 746C Recognized (UL File E225855, MH26317)
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Meets criteria for UL 48 Electric Signs and Canadian CSA-C22.2 standards
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Compatible with electrical enclosures, sign cabinets, and ACM bonding in UL-listed assemblies
Compatible Substrates
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Aluminum and stainless steel
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Cold-rolled steel
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Aluminum composite materials (ACM)
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PVC foam board, PETG
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Polycarbonate, acrylics (with prep)
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Vinyl laminate, polystyrene foam board
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Glass (requires AP-134 adhesion promoter)
Packaging & Ordering Info
| Cartridge Size | Part # | Mix Ratio | Dispensing Gun | Mixing Tip |
|---|---|---|---|---|
| 210ml | 3031524 | 2:1 | NEW-3-203-XSP Gun | MCQ 08-24T |
Note: Lord 406/19 (industrial version) is available in 50ml, 404ml CX, and 415ml sizes and is listed separately under industrial packaging SKUs.
Related Signlok Products (210ml Cartridge Series)
| Product | Work Time | Color | Use Case |
|---|---|---|---|
| Signlok 403 | 2–4 min | Tan | Fast cure; quick sign fabrication jobs |
| Signlok 406 | 6–10 min | Tan | General-purpose, strong structural bond |
| Signlok 810 | 8–12 min | Dark Gray | Flexible bonding with low read-through |
| Signlok 7550 | 3–5 min | Clear | Non-structural clear trimcap bonding |
Technical Support
Need help choosing between Signlok adhesives or configuring your dispensing setup?
Email: [email protected]
Phone: 800-220-1966
Request samples or schedule a consultation with our adhesive specialists today.
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