Hardtop XP

Overview

Jotun Hardtop XP is a cost-effective, two-component, polyurethane topcoat designed to provide high levels of durability, UV resistance, and aesthetics in harsh environments. It is widely used in industrial, commercial marine, and offshore applications where long-term protection and colour retention are critical. Hardtop XP delivers a smooth, gloss finish with good resistance to chemicals and weathering, making it a preferred choice for professionals seeking a durable and aesthetically pleasing topcoat at an affordable price.

Key Product Features

• Excellent UV and Weather Resistance – Ensures long-lasting colour and gloss retention.
• Durable – Provides long service intervals.
• Smooth, Glossy Finish – Enhances aesthetics while providing long-term protection.
• Excellent Application Properties – Easy to apply by spray, brush, or roller with good flow and levelling.
• High Solids Content – Reduces VOC emissions and provides superior coverage.
• Versatile – Compatible with a wide range of primers and intermediate coats.
• Fast Drying and Recoating – Allows for efficient project completion and reduced downtime.

The table below compares Jotun Hardtop XP to alternative but similar products.

Compared to standard polyurethane topcoats, Hardtop XP provides better gloss retention, easier application, and superior durability. When compared to epoxy-based topcoats, it offers much better UV stability, preventing chalking and fading over time.

Suitable Uses and Applications

Jotun Hardtop XP is suitable for a number of different substrates including;

• Carbon steel
• Galvanized steel
• Aluminium
• Concrete (when properly primed)
• Aged coatings (when properly prepared)

Hardtop XP is also designed for environments where long-term aesthetic and protective performance is required, including:

• Marine - Superstructures, decks, and topside areas exposed to UV and harsh weather.
• Offshore - Oil platforms, wind turbines, and coastal installations requiring durability.
• Industrial - Machinery, equipment, and structures exposed to chemicals and mechanical wear.
• Infrastructure - Bridges, pipelines, and steel structures in high-exposure environments.
• Transportation - Vehicles, trains, and other transport assets needing a tough, glossy finish.

Basic Application Guide for Hardtop XP

Jotun Hardtop XP can be applied as a topcoat over primers or prepared existing coatings using several different application methods.

For more information on applying Jotun Hardtop XP, please see our detailed application guide here

Step 1 – Surface Preparation

Jotun Hardtop XP can be applied as a topcoat over primers or prepared existing coatings using several different application methods.

• Over Aged Coatings - Light sanding or solvent cleaning may be required for optimal adhesion.
• Over Primers / Intermediate Coats - Suitable primers would include Jotamastic 90, Jotacote Universal and the Penguard range.  Ensure the previous coat is clean, dry, and within the recoat window.

Step 2 - Mixing

• Mix 10 parts Hardtop XP Component A with 1 part Component B.
• Stir thoroughly using mechanical agitation for consistent application properties.

Step 3 - Thinning (if necessary)

• Thinners such as Jotun Thinner No. 10 can be used with Hardtop XP if required.

Step 4 – Applying Hardtop XP

Weather conditions should be dry, with temperatures above 5 °C avoiding high winds.  A variety of different methods can be used to apply Hardtop XP

• Airless Spray - Recommended for large areas to ensure uniform coverage.
• Conventional Spray - Provides a fine, smooth finish with better control.
• Brush / Roller - Suitable for touch-ups and small areas but may require multiple coats for uniformity.

Step 5 - Drying and Curing

• Touch Dry - Approximately 3.5 hours at 23°C.
• Dry to Handle - Around 7 hours at 23°C.
• Full Cure - Achieved in 7 days at 23°C.

Jotun Hardtop XP Frequently Asked Questions (FAQ's)

The FAQ's below are for general guidance only.  For specific questions, please refer to the application guides and data sheets on our product pages, or give us call and we will answer any questions that you have.

Q. What makes Jotun Hardtop XP different from other polyurethane topcoats?

A. Hardtop XP provides a smoother finish and higher durability than standard polyurethanes. It also has better application properties, allowing for easier and more efficient use.

Q. Can Hardtop XP be applied directly to bare metal?

A. No, it requires a suitable primer, such as Jotamastic 90 or Jotacote Universal, to ensure proper adhesion and corrosion resistance.

Q. Does Hardtop XP provide chemical resistance?

A. Yes, it offers good resistance to mild chemicals, fuels, and industrial atmospheres, but for extreme chemical exposure, a specialized chemical-resistant coating may be required.

Q. How does Hardtop XP compare to epoxy topcoats?

A. While epoxy topcoats provide excellent mechanical and chemical resistance, they lack UV stability and tend to chalk over time. Hardtop XP retains its colour and gloss much longer in outdoor environments.

Q. Can Hardtop XP be applied in cold temperatures?

A. Yes, down to 5˚C but drying and curing times will be significantly longer.

Q. What is the best application method for achieving a smooth, high-gloss finish?

A. Airless spray or conventional spray is recommended for the best finish.

Q. Is Hardtop XP resistant to abrasion and mechanical wear?

A. It provides good resistance to impact, abrasion, and general mechanical damage.  For better topcoat abrasion resistance use Jotun Hardtop AX (glossy) or Jotun Hardtop HB (satin).

Q. Can Hardtop XP be used in a multi-coat system?

A. Yes, it is commonly used as a topcoat over a high-performance primer and intermediate coat for optimal protection.

Q. Is Hardtop XP suitable for immersion service?

A. No, it is not designed for continuous water immersion. For submerged areas, an epoxy-based coating is recommended.