2K
Clear CoatZN-310
2K Acrylic Clear Coat
Standard 2K acrylic clear coat (2 : 1) for automotive repair and industrial surfaces; dries fast and offers strong UV protection and high chemical resistance.
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Hardener · ZN-420
2K Acrylic Hardener
General-purpose hardener for standard 2K acrylic paint and clear coat systems; delivers balanced drying and high chemical resistance with ZN-310.
- 2K · Two-component
- Steel panel
- Galvanised steel
- Aluminium
- Plastic
Packaging
0.5 L · 2.5 L
Overview
What is 2K Acrylic Hardener?
ZN-420 2K Acrylic Hardener is a general-purpose, aliphatic isocyanate-based hardener developed for standard 2K acrylic paint and clear coat systems. In the Zenova system it is paired with ZN-310 2K Acrylic Clear Coat and used at a ratio of 2 : 1 by volume. It reacts with the acrylic resin to turn the liquid mixture into a hard, glossy, durable polyurethane film, allowing the protective properties of the clear coat to develop fully.
Its balanced reactivity offers a practical compromise between pot life and drying speed: the mixture stays usable long enough for comfortable application, while the film becomes dust-free within a reasonable time. The fully cured surface is highly resistant to fuel, oil, road grime and washing chemicals. Its aliphatic structure helps to retain gloss and colour shade in exterior conditions.
ZN-420 is added at a ratio of 1 part hardener to 2 parts ZN-310 by volume, and the mix is then thinned with 5–10% ZN-510 Acrylic Thinner. For ZN-320 MS and ZN-330 HS clear coats, ZN-430 and ZN-440 should be used respectively. Before using it with a different 2K acrylic paint system, we recommend consulting the Zenova technical support team about compatibility. The correct mixing ratio directly determines the final hardness and durability of the clear coat.
Key features
- General-purpose hardener for standard 2K acrylic paints and clear coats
- Easy, error-free 2 : 1 mix with ZN-310
- Well-balanced pot life and drying speed
- High resistance to fuel, oil and chemicals
- Aliphatic structure for lasting gloss and colour shade
Technical specifications
Technical data
Values are typical at 20 °C and 65% relative humidity. Please review the product's current Technical Data Sheet (TDS) before application.
| Type | Aliphatic isocyanate-based, solvent-borne hardener |
|---|---|
| Compatible products | ZN-310 2K Acrylic Clear Coat; standard 2K acrylic paint systems |
| Mixing ratio (by volume) | 2 : 1 (clear coat : hardener) |
| Effect | Balanced drying, high chemical resistance and lasting gloss |
| Resulting pot life | Approx. 2 h at 20 °C with ZN-310; shorter at higher temperatures |
| Moisture sensitivity | High; keep the container tightly closed and do not use cloudy or gelled product |
| Appearance | Clear liquid, colourless to pale yellow |
| Packaging | 0.5 L, 2.5 L |
Pack sizes
- 0.5 L
- 2.5 L
Technical documents
Our technical team will send the Technical Data Sheet (TDS) and Safety Data Sheet (SDS) you request by email.
Drying times vary with temperature, humidity, film thickness and air circulation. Consult our technical team about special conditions.
Application
Step-by-step application
The recommended application sequence for a professional result.
- 01
Preparation
Stir the ZN-310 thoroughly in its tin. Before opening the hardener tin, clean around the lid to prevent dust and moisture from getting in.
- 02
Measuring
In a graduated mixing cup, add 1 part by volume of ZN-420 to 2 parts of ZN-310; never measure by eye.
- 03
Thinning and mixing
Add 5–10% ZN-510 Acrylic Thinner, stir until the mixture is uniform and strain it into the spray gun.
- 04
Use within the pot life
Apply the mixture within approximately 2 h at 20 °C; this time is shorter in hot conditions. Do not store leftover mixture in a closed container.
- 05
Closing the container
Immediately after use, wipe the rim of the tin and close the lid tightly. Make sure opened containers are used up within a short time.
Storage and safety
- Reacts with moisture: close the lid tightly after each use; do not use product that has turned cloudy or gelled.
- Store in the original container at 5–25 °C in a cool, dry place, protected from direct sunlight.
- Flammable liquid: keep away from heat, sparks and open flames; ventilate the area of use well.
- Contains isocyanates; may cause an allergic reaction. Wear suitable respiratory protection, chemical-resistant gloves and eye protection; refer to the product's Safety Data Sheet (SDS) for full details.
System compatibility
Products used together
Zenova products tested in the same system as this product, which give the best results together with it.
1KThinnerZN-510Acrylic Thinner
Balanced-evaporation thinner that brings 2K acrylic paints, clear coats and primers to ideal spray viscosity; reduces orange peel and ensures even flow.
View product- 1KThinnerZN-520
Blending (Fade-out) Thinner
Blending thinner that makes the transition between new clear coat and existing paintwork invisible in spot repairs; melts in overspray edges and eases polishing.
View product - 1KThinnerZN-530
Surface Cleaning Thinner
Removes grease, silicone, wax, tar and sanding dust before painting, priming and filling; cuts the risk of silicone craters (fisheyes) for more reliable adhesion.
View product
Frequently asked
Questions about 2K Acrylic Hardener
Knowledge Centre
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Painting in Cold and Humid Weather: How to Prevent Drying Problems
Painting in cold, humid weather: understand dew point and 2K curing, heat the booth and choose the right thinner and hardener to prevent drying problems.
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