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Low-VOC, water-based two-component epoxy system compliant with global environmental regulations.
Excellent adhesion to steel, concrete, and galvanized substrates without primer.
Fast ambient-cure capability with good early hardness development (≥90% hardness in 24 h at 25°C).
Superior chemical resistance to alkalis, salts, and mild acids after full cure.
Stable dispersion with low viscosity, enabling easy mixing and application by spray, roller, or brush.
Industrial floor coatings for warehouses, factories, and logistics centers.
Protective linings for potable water tanks and concrete containment structures.
Anti-corrosive primers and topcoats for steel bridges and marine infrastructure.
Food & beverage processing facility flooring requiring FDA-compliant cured films.
Renovation systems for aged concrete surfaces in commercial and institutional buildings.
| Chemical Type | Waterborne bisphenol-A epoxy resin (Part A) + aliphatic amine hardener (Part B) |
| Product Form | Two-component liquid system (separately packed) |
| Appearance (Part A) | Translucent off-white to pale yellow liquid |
| Appearance (Part B) | Clear to light amber liquid |
| Mix Ratio (by weight) | Part A : Part B = 100 : 12 |
| Solids Content (Part A) | ≈60 ± 2 wt% |
| pH (Part A, 25°C) | 7.2 – 8.0 |
| Shelf Life (unopened, 5–30°C) | 12 months from manufacture date |
Q1: What is the primary function of DIC 2K EXA-8420-60W in waterborne epoxy systems?
A: EXA-8420-60W serves as a reactive waterborne epoxy resin component, enabling two-component (2K) formulations that cure at ambient or elevated temperatures. It provides excellent adhesion to metal and concrete substrates, good chemical resistance, and low VOC content—making it suitable for high-performance industrial coatings where solvent reduction is required.
Q2: Can EXA-8420-60W be used with standard amine-based hardeners?
A: Yes, it is compatible with a range of commercially available waterborne and solvent-free polyamine hardeners. Optimal performance is achieved when paired with hardeners specifically designed for waterborne epoxy systems—formulators should verify compatibility and pot life through small-scale trials before full-scale production.
Q3: How does the waterborne nature of EXA-8420-60W affect film formation and curing behavior?
A: As a stable aqueous dispersion, EXA-8420-60W enables uniform film formation without organic solvents. Curing involves coalescence of dispersed particles followed by crosslinking with the hardener; optimal film integrity and performance are achieved under controlled humidity and temperature conditions during the drying and cure stages.
Q4: Is EXA-8420-60W suitable for food-contact or potable water applications?
A: EXA-8420-60W is not pre-certified for direct food-contact or potable water applications. Its suitability for such uses depends on final formulation, curing conditions, and compliance testing against relevant regulatory frameworks. End users must conduct full regulatory evaluation and obtain appropriate approvals before deployment in sensitive service environments.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
