The deck is ready – the cork has been laid, and the result is fantastic. It really makes an impression now! It would be a shame to let it go to waste, so before the sun, rain, wind, and unpredictable weather take their toll, protect it with Sea Line boat varnish. Shields against UV rays and moisture while also making it easier to keep clean. This way, the deck retains both its shape and appearance – staying in top condition throughout the season.

Protects Against Moisture

For Cork and Wood

Sun Protection

Clear Finish

Clean and Refined Look

For DIYers and Professionals
You’ve probably got a few questions – let us answer them!
WHAT IS THE MARINE VARNISH USED FOR?
This is a yacht varnish designed to protect surfaces on boat and yacht decks. It provides long-lasting protection and helps keep the surface in excellent condition.
WHAT SURFACES IS THE CLEAR YACHT VARNISH SUITABLE FOR?
Sea Line varnish is ideal for cork and wooden surfaces. It can be used both indoors and outdoors – but only above the waterline.
WHAT IS THE VARNISH’S VOLUME?
The varnish comes in a 750 ml container.
DOES THIS BOAT VARNISH CHANGE THE COLOUR OF THE DECK?
No, it’s clear and simply enhances the natural appearance of the material. Its sheen can visually deepen the colour and highlight the texture – often referred to as the “wet wood” effect.
HOW MUCH CORK VARNISH DO I NEED?
Consumption is approximately 80–100 ml per 1 m². It’s recommended to apply at least two coats.
HOW SHOULD I PREPARE THE SURFACE BEFORE APPLYING THE VARNISH?
Before you start varnishing:
- Remove dust, dirt, and salt using clean water.
- Degrease the surface (ideally with Sea-Line Cleaner).
- Make sure the surface is completely dry.
The varnish is single-component, meaning no hardener is needed – it dries on its own after application.
HOW DO I APPLY THE YACHT VARNISH GLOSS?
You can apply the varnish using a brush or roller – these are the simplest and most commonly used methods. If you have a spray gun and some experience, that’s also a great option.
HOW LONG DOES BOAT VARNISH TAKE TO DRY?
Under standard conditions – that is, at around 20°C – the varnish dries in stages. After 3 hours, it is touch-dry, and after roughly 16 hours, it becomes rain-resistant. Full water resistance is achieved after 24 hours.
Tip: If you’re planning to apply another coat, it’s best to wait at least 16 hours.
You're looking for a way to protect your deck, but worried the result might look artificial? An overly thick, glossy layer spoils the natural charm of cork. Sea Line varnish gives a natural effect. It doesn’t change the colour of the material – it simply enhances its texture in a subtle way.

#1 CARES FOR CORK
Cork is a beautiful, natural material that looks great on the deck. But – like any outdoor surface – over time it may start to lose its charm. The varnish protects the deck from everyday wear while preserving its natural texture and colour.
The result? Your deck looks fresh, clean, and refined all season long. You can walk on it barefoot, invite friends aboard, and not worry about anything getting damaged. Just comfort, convenience, and peace of mind.
#2 RESISTANT TO UV RAYS AND CHANGING CONDITIONS
Sun, salt, wind, and rain – it's all part of daily life for a boat deck. The varnish effectively protects the surface from fading, drying out, and the effects of weather.
For you, that means less effort and expense, and more time for hobbies and relaxation. Because instead of constantly fixing things, you simply enjoy a solid, durable finish. And that makes a real difference – especially with regular use of your boat.
#3 EASY AND SAFE APPLICATION (EVEN FOR BEGINNERS)
You don’t have to be a professional to properly protect your boat. The varnish has been designed so you can apply it yourself – without stress or specialist equipment. All you need is a brush, roller, or spray gun.
That’s a big advantage, especially if you’re refurbishing your boat on your own or just starting out with maintenance. This varnish doesn’t put you off – on the contrary, it gives you the satisfaction of a job well done. And most importantly – it works exactly as it should.
Type | Gloss |
Efficiency | 100 ml/m² (recommended to apply two coats) |