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Description
LORD® 459X adhesion enhancer/surface modifier is designed for promoting adhesion to thermoplastic elastomers (TPE), thermoplastic polyolefins (TPO) and EPDM. LORD 459X primer is in xylene solvent, diluted for direct application.
Lord 459X is Thin Waterlike, whereas Lord 459T is thick and gel-like for precice and vertical non-drip surface priming.
LORD 459X adhesion enhancer/surface modifier can be used in conjunction with LORD acrylic adhesives, urethane adhesives and epoxy structural adhesives, as well as with a variety of double-sided tapes.
Lord 459X is similar to another primer the Lord 7701, but they work with different glue types. Here's a comparison between LORD 459X and LORD 7701, both of which are adhesion enhancers/primers for improving bonding to low surface energy materials — especially rubbers and plastics — but they differ significantly in chemistry, usage, and compatibility.
Which Should You Use?
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Choose LORD 459X or LORD 459T if you're bonding:
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Rubbers (EPDM, NBR, NR, etc.)
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With MMA adhesives
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Choose LORD 7701 if you're bonding:
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TPO, TPV, polypropylene, or other difficult thermoplastics
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With urethane, epoxy, or acrylic adhesives
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| Feature | LORD 459X | LORD 7701 |
|---|---|---|
| Type | Surface treatment primer | Surface treatment primer |
| Base Chemistry | Solvent-based adhesion promoter (for elastomers) | Solvent-based adhesion promoter (for TPO/TPV/polyolefins) |
| Primary Use Case | Improves bonding of MMA adhesives to rubber/elastomers | Enhances bonding to thermoplastic polyolefins (TPO), TPVs, and similar |
| Best Substrates | - EPDM rubber - Nitrile (NBR) - Natural rubber - Neoprene |
- Polypropylene (PP) - Thermoplastic polyolefin (TPO) - TPV |
| Target Adhesives | Designed for use with MMA adhesives (like LORD 7542) | Compatible with urethane, epoxy, and acrylic adhesives |
| Surface Prep Required | Clean (degrease) before use | Clean, possibly abrade depending on substrate |
| Dry Time | ~30 minutes at room temperature | ~60 minutes at room temperature (varies with film thickness and ventilation) |
| Cure Behavior | No separate cure — just air dry | No separate cure — just air dry |
| Shelf Life | ~6 months to 1 year (typical) | ~6 months to 1 year (typical) |
| Common Applications | Bonding rubber gaskets, seals, bumpers, and isolation pads | Automotive TPO bumpers, interior trim panels, or plastic housings |
Shelf Life
Shelf life is six months from date of shipment when stored at 21-27°C (70-80°F) in original, unopened container.
Avoid storage in lit areas. Store only in original container or UV-filtering plastic or glass container. Do not store in metal containers. Store LORD 7701 surface treatment in a cool, dark area away from oil, grease, sawdust, floor sweepings, easily oxidized organic compounds, ammonia, amines, ammonia salts, and metallic materials. Do not pollute with water or alcohol. In the event of a spill, use large quantities of water to flush the area.
Features and Benefits
- Works with various rubbers / vulcanized, thermoset, and thermoplastic polymeric materials like HDPE, LDPE, MDPE, LLDPE, PP, and EPDM
- Versatile – functions as a cleaner and surface conditioner; treats a wide variety of elastomer functional materials.
- Optimized for MMA glues.
- Easy to Apply – applies easily by wipe, brush, dip or flood methods.
- Convenient – requires no mixing.
- Improved Adhesion – improves adhesion to cast urethanes and cured rubber.
- Fast Drying – adhesion enhancer/surface modifier flashes off within five minutes or less.
- Environmentally Resistant – promotes increased environmental resistance by allowing the treated surface to be more easily wet.
| Appearance: | Clear to Cloudy Liquid |
| Viscosity | about 10 cPs |
| Density lb/gal (kg/m3) | 7.15-7.35 (857-881) |
| Solids Content by Weight, % | 2.7.4.1 |
| Flash Point (Seta), °F (°C) | 81 (27) |
| Solvent | Xylene |
Storage
Store LORD Adhesion Enhancers/Surface Modifiers should in theiroriginal containers. When transferringto another container, only transfer the amount needed for the application. Do not return unused material to the original container as this will cause pollution. LORD 7701 cannotbe stored in metal containers orbe used with metal acid brushes as this will cause the material to precipitate white particles. Keep all
LORD adhesion enhancers/surface modifiers (except LORD 459T or 459X) in a cool, dark and dry area.
