LORD 403/19 MMA Acrylic Structural Adhesive, 2-4 Min Super Fast Set, Non-Sag, 4:1 Ratio
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Regular price
$ 29.99 USD
2 units available
LORD 403/19 is a two-part methyl methacrylate (MMA) structural adhesive that sets in 2 to 4 minutes and holds parts in 4 to 6. It bonds bare metal, coated metal, engineered plastics and composites with little or no surface prep, and it stays tough in the cold and under impact. Fabricators use it to replace welds, rivets and screws on sign letters, trailer panels, enclosures, brackets and frames.
This is the fastest formula in the LORD 400 family. Pick it when you want quick clamp turnaround on small and mid-size parts. If you need more time to position parts, look at LORD 406/19 or LORD 410/19GB (see the comparison below).
Features and Benefits
- Very fast set: 2 to 4 minute working time, handling strength in 4 to 6 minutes, 90% of full strength in about 2 hours.
- Bonds dissimilar materials: aluminum, steel, galvanized and powder coated metal, plus XENOY®, polycarbonate, ABS, acrylic and composites.
- Minimal prep: normal mill oils and drawing compounds usually do not affect adhesion. Wipe off grease and loose oxide and go.
- Tough in the cold: rated -40°F to +300°F (-40°C to +149°C) with high impact and peel strength.
- Non-sag gel: stays put on vertical and overhead joints.
- Weather and chemical resistant: holds up to dilute acids, alkalis, solvents, oils, moisture, salt spray and indirect UV.
- UL 746C certified when mixed with LORD Accelerator 19.
- Cure you can see: the mix changes color as it cures, so you know when a joint is done.
Choose Your Color / Accelerator
Every option uses LORD 403 adhesive at a 4:1 mix ratio by volume. The accelerator side sets the cured color, and "GB" versions add glass microbeads that hold a consistent minimum bondline thickness, which helps on clamped joints and production work.
| Option | Accelerator | Mixed Color | Cured Color | Mix Ratio by Weight | Sizes |
|---|---|---|---|---|---|
| Natural | Accelerator 19 | Tan | Tan to Green | 3.02:1 | 50 mL, 375 mL |
| Natural (Glass Bead) | Accelerator 19GB | Tan | Tan to Green | 2.91:1 | 375 mL |
| Black | Accelerator 19 Black | Grey | Black | 3.00:1 | 375 mL |
| Red (Glass Bead) | Accelerator 19GB Red | Light Red | Dark Red | 2.91:1 | 375 mL |
| Grey (Glass Bead) | Accelerator 19GB Grey | Grey | Grey | 2.85:1 | 375 mL |
How 403 Compares to 406 and 410
LORD 403, 406 and 410 share the same chemistry, the same 4:1 ratio with Accelerator 19 or 19GB, and the same cured strength. The difference is speed. Faster formulas get parts out of clamps sooner. Slower formulas give you time to bead long seams and line up large panels.
| LORD 403/19 (this product) | LORD 406/19 | LORD 410/19 | |
|---|---|---|---|
| Working time @ 75°F | 2 to 4 min | 6 to 10 min | 20 to 30 min |
| Handling strength @ 75°F | 4 to 6 min | 12 to 17 min | 60 to 120 min |
| Full cure @ 75°F | 24 hr (90% at 2 hr) | 24 hr | 24 hr |
| Tensile strength / elongation | 2,700 psi / 30% | 2,700 psi / 30% | 2,700 psi / 30% |
| Service temperature | -40°F to 300°F | -40°F to 300°F (406/19GB tested to 400°F for 90 min post-bake) | -40°F to 300°F |
| Best for | Small parts, spot bonds, repairs, fast fixture turnover | Everyday shop work, channel letters, brackets, mid-size panels | Long seams, large panels, multi-part assemblies, hot shops |
| Shop on Perigee | You are here | 406/19 | 406/19GB | 410/19GB |
Rule of thumb: if you can't place and clamp the part inside 3 minutes, step up to 406. If the bead is longer than a few feet or your shop runs hot, go to 410. Heat shortens working time on all three.
Accelerator 17 vs 19 vs 19GB: the same adhesives also run with LORD Accelerator 17 at a 10:1 ratio (cures light green). Accelerator 19 improves high temperature resistance and carries the UL 746C rating. Accelerator 19GB adds glass beads for bondline control. See LORD 406/17 for the 10:1 version.
Technical Specifications
Uncured adhesive (LORD 403)
| Chemistry | Methyl methacrylate (MMA) acrylic, 2-part |
| Appearance | Off-white to tan paste |
| Viscosity, Brookfield @ 77°F (25°C) | 100,000 to 300,000 cP |
| Density | 9.25 to 9.55 lb/gal (1108 to 1144 kg/m³) |
| Flash point | 59°F (15°C) |
| Solids content (mixed) | 100% |
| VOC (calculated, per SDS) | 0 g/L |
Mixed and cure properties
| Mix ratio by volume | 4:1 (adhesive to accelerator) |
| Working time @ 75°F (24°C) | 2 to 4 minutes |
| Time to handling strength (50 psi shear) @ 75°F | 4 to 6 minutes |
| Full cure @ 75°F | 24 hours (90% of full strength at 2 hours) |
| Heat-assisted cure | Modest heat below 150°F (66°C) speeds cure |
Cured properties (with Accelerator 19)
| Tensile strength at break (ASTM D638 mod.) | 2,700 psi (18.6 MPa) |
| Elongation (ASTM D638 mod.) | 30% |
| Young's modulus (ASTM D638 mod.) | 130,000 psi (896.3 MPa) |
| Glass transition temperature (DMA) | 162°F (72°C) |
| Service temperature range | -40°F to +300°F (-40°C to +149°C) |
| Certification | UL 746C (with Accelerator 19) |
Bond performance, lap shear psi (LORD published data for the 400 family, tested with 406/19, dry rag wipe only, 0.010" bondline)
| Test | Aluminum to Aluminum | Galvanized to Galvanized Steel | Powder Coated to Powder Coated Steel |
|---|---|---|---|
| Room temperature | 3,000 | 2,500 | 2,800 |
| Hot, 180°F (82°C) | 1,500 | 1,830 | 1,050 |
| Cold, -30°F (-34°C) | 3,000 | 2,800 | 3,300 |
| After 500 hr salt spray | 2,650 | 2,500 | 1,470 |
| After 14 days, 100°F / 100% RH | 2,900 | 2,450 | 2,400 |
| T-peel, pli | 37 | 22 | 26 |
Data is typical and not for specification. Test your own parts before production.
How to Use
- Prep: wipe off grease, dirt and loose oxide. Most plastics only need cleaning. Some benefit from a light scuff.
- Load and level: put the cartridge in the gun, remove the caps, and dispense a small amount until both sides flow evenly.
- Mix: attach a static mixer and purge one mixer length of adhesive. Even color means a good mix.
- Apply and mate: bead the adhesive and join parts within 2 to 4 minutes. Slide to align. Don't pull the joint apart once mated.
- Clamp: hold until handling strength (4 to 6 minutes). Leave 24 hours for full cure.
- Clean up: before cure, use isopropyl alcohol, acetone or MEK. Cured adhesive softens at 400°F (204°C) and above for disassembly.
Storage and Shelf Life
Shelf life is 9 months from manufacture when stored unopened below 80°F (27°C). For best results store at 40 to 50°F (4 to 10°C), keep out of direct sun, and let cold cartridges come to room temperature before use. Our "Short Shelf Life" and "Recently Expired" options are priced for shop use where you will use the material quickly. Run a test bond before using older material on critical parts.
Safety and Shipping
LORD 403 adhesive is a flammable liquid (flash point 59°F) with a noticeable odor. Use with good ventilation, chemical-resistant gloves and eye protection, and keep away from sparks and open flame. Read the Safety Data Sheet before use. Intended for industrial and commercial use by trained users. Not for household use.
Ships as a regulated material: Adhesives, UN1133, Class 3, Packing Group II.