LORD AP-134
Harmonization Code : 3208.20.90 | Paints and varnishes that are dispersed or dissolved in a non aqueous medium
Main features
- One-Coat Moisture-Cure Multi-Substrate Primer
- No-Mix Spray/Dip/Felt Application
- 1 to 2-Hour Ambient Hydrolysis
Product Description
LORD® AP-134 Adhesion Enhancer/Surface Modifier is a one-coat, moisture-cure primer used to promote adhesion to polar substrates including architectural and automotive glass, steel, aluminium, brass, e-coated metal, glass fabric, ceramic tile, vitrified clay pipe, concrete and selected plastics. It also functions as a surface treatment for reaction-injection-moulded polyurethane bonded to glass. LORD AP-134 requires no mixing or dilution and applies by spray, dip or polyester felt applicator. For optimum adhesion, apply a 1.52–2.54 µm dry film, then hydrolyse for 1–2 hours at 21–32°C and 50–80% RH, or use an accelerated 88°C oven cure for approximately three minutes with humidity-controlled incoming air.
Key features
- One-coat adhesion primer for glass and other polar substrates
- No mixing or dilution required
- Spray, dip or polyester felt application
- Controlled 1.52–2.54 µm dry-film target
- Ambient-humidity or accelerated oven hydrolysis
- Supports glass, ceramic, stone and selected metal or plastic bonding processes
- Can function as a surface treatment for RIM polyurethane-to-glass applications
Applications
- Architectural and automotive glass bonding
- Smooth or polished ceramic and stone preparation
- Glass fabric, vitrified clay pipe and concrete treatment
- Steel, aluminium, brass, e-coated metal and selected plastic preparation
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Thermal Properties
Additional Information
LORD® AP-134 Adhesion Enhancer/Surface Modifier
A clear, straw-yellow, solvent-borne primer used to prepare glass and other polar surfaces for downstream adhesive, topcoat or encapsulating-polymer application. Its moisture-cure hydrolysis can be completed at ambient temperature and controlled humidity or accelerated in a humidity-supplied oven.
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Low-viscosity, low-solids primer requiring moisture protection
| Property | Typical value | Context |
|---|---|---|
| Appearance | Clear, straw-yellow liquid | Visual description; typical, not a specification limit. |
| Kinematic viscosity at 25°C | 0–8 cSt | Low-viscosity primer suitable for thin-film application. |
| Density | 863–899 kg/m³ | Equivalent to 7.2–7.5 lb/gal. |
| Solids content | 4.8–6.2% by weight | Dry-film formation depends on application coverage and solvent loss. |
| Flash point | 1°C | Seta method; highly flammable processing implications. |
| Published solvents | Toluene, n-butanol and ethanol | The current US SDS also identifies 2-butoxyethanol in the formulation. |
| Mixing or dilution | Not required | Protect the material from moisture contamination after opening. |
Prime polar surfaces before the selected adhesive, topcoat or encapsulating polymer
Architectural and automotive glass, including sign-industry glass bonding where the selector guide requires AP-134.
Ceramic tile and smooth or polished non-porous ceramic or stone surfaces after the documented cleaning process.
Steel, aluminium, brass, e-coated metal, vitrified clay pipe and concrete where product-specific process validation supports use.
Glass fabric, selected plastics and surface treatment for reaction-injection-moulded polyurethane-to-glass processing.
Clean the substrate and deposit a uniform micron-scale film
- For optimum glass adhesion, clean the bond surface with a vinegar-modified glass cleaner.
- For other applications, wipe the surface with a suitable validated solvent.
- Handle cleaned parts carefully to prevent fingerprints, dust, oil and recontamination.
- Apply by spray, dip or polyester felt applicator.
- Use a single coat for most applications unless product-specific testing requires another process.
- Control application to a 1.52–2.54 µm dry-film thickness.
- Avoid puddling, runs, edge accumulation and non-uniform coverage.
- Keep transfer and application equipment dry and compatible with the solvent system.
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Humidity is part of the cure process
Allow 1–2 hours at 21–32°C and 50–80% RH.
Use approximately 88°C for three minutes with incoming oven air maintained at 50–80% RH.
Large or high-thermal-mass parts may require additional oven time because of heat-sink effects.
For best adhesion, apply the topcoat or encapsulating polymer within 24 hours after the primer cures.
The 2026 sign-industry selector guide uses a 120-minute hydrolysis instruction for glass, ceramic and stone. Treat that as the preferred application-specific timing when following SG1002.
Cleanup, storage and safety
Remove wet LORD AP-134 with toluene or alcohol. Remove cured material by mechanical abrasion, blasting or grinding. Shelf life is one year from date of shipment when stored at 21–27°C in a dry, well-ventilated area in the original unopened container. After opening, protect the primer from moisture; use a desiccant cartridge when drawing from a 55-gallon drum. The current US SDS classifies LORD AP-134 as a highly flammable liquid and vapour with inhalation, skin, eye, reproductive, aspiration, organ-toxicity and aquatic hazards. Use trained personnel, explosion-proof ventilation and electrical equipment, grounding and bonding, non-sparking tools, suitable respiratory protection where required, protective gloves, clothing and eye/face protection.
Treat primer performance as part of the complete substrate–primer–adhesive system
LORD AP-134 is most useful where a polar substrate requires a controlled primer layer before structural adhesive, topcoat, encapsulating polymer or RIM polyurethane processing. Final qualification should address substrate composition and finish, cleaner residue, surface age, film thickness, application uniformity, humidity, hydrolysis time, part mass, oven airflow, time to downstream application, adhesive or coating chemistry, bondline, cure, environmental ageing and failure mode.
Glass and smooth ceramic or stone surfaces used with the adhesive systems and hydrolysis process listed in SG1002.
Architectural or automotive glass where cleaning, dry-film thickness, humidity and downstream timing can be controlled.
Metals, glass fabric, ceramic, vitrified clay, concrete and selected plastics after application-specific validation.
Sign-industry substrate and adhesive selection guidance
LORD Structural Adhesives for the Sign Industry — SG1002
Current Parker selector guide covering sign substrates, surface preparation, compatible adhesive families and AP-134 requirements for glass and smooth or polished ceramic and stone. It specifies 120 minutes of hydrolysis for those AP-134-treated sign substrates.
Open SG1002Validate LORD® AP-134 for your substrate and downstream adhesive process
Krayden can help review surface cleaning, substrate finish, application method, dry-film thickness, humidity, hydrolysis or oven cure, open window, adhesive selection, environmental exposure and final bond qualification.
