What’s The Best Varnish For Your Yacht?

Varnishing your yacht is essential to protect it from the elements and preserve its longevity. As wood is a natural product, it’ll break down and become damaged when exposed to moisture, general pollution, and UV rays. Varnish creates a barrier against all of these things, gives your yacht a beautiful finish and makes it easier to clean.

The best way to prevent damage to your boat is to touch up any breakage in the wood as soon as you notice it. Doing this will prevent water from soaking into the wood. Generally, it’s good to varnish your yacht every one to two years.

However, varnishing isn't a simple task, as there’s a large selection of boat varnishes to choose from. Gaining an understanding of the qualities of different types of varnish is essential so you can choose the ideal one for your boat.

Here, we reveal which varnish is best suited to your yacht.

1. How to varnish

Wood must be sanded before finishing – slow and steady is the way to go with sanding. Don’t dig into lower grooves, as it’s important to create even layers when sanding. Otherwise, when the varnish sits on top, it won’t have the professional finish you’re looking for.

When you’re finished sanding, wipe any excess dust with a super soft brush, as you don’t want to varnish over small sharp wood. Some woods, such as teak, are rich in natural oils, so it’s a good idea to wipe the wood with a solvent such as acetone after the final round of sanding. This dissolves the surface oils and helps with finish adhesion.

Once you’ve finished sanding, use a paintbrush and coat the wood in the varnish. It’s important to be precise with varnish and coat every part of the wood thoroughly.

2. Choosing the right finish

Some woods such as teak, cedar, and oak can be left unfinished. These woods are decay-resistant, but adding a varnish finishing enhances its appearance, so most owners still choose to use varnish.

Tropical hardwoods such as cocobolo and lignum vitae are difficult to finish with varnish, as oil-based varnishes won't dry properly when placed on top. If you have a teak deck, it's best to leave it bare, but you should clean the surface regularly with liquid soap or a specific teak deck cleaner. Don't use a stiff or wire brush or rub with the grain when you clean, as this is too harsh. Avoid the temptation to pressure wash your yacht, as doing this will damage and weaken the wood.

The advantage of unfinished wood is that you’ll never have to refinish it; if installed properly, it can last years. Most boat owners prefer the sheen of an oil or film finish, even though this is unnecessary.

3. Tung Oil Varnish

Tung oil boat varnish is what some yacht owners refer to as the classic varnish. It’s referred to in this way because if you’re unsure of what your boat needs, this is a classic, middle of the road, safe bet.

The base and main ingredient of tung varnish is a natural oil, mixed with other things such as solvents, resins, and UV protectors. This type of varnish is flexible and can protect the wood from water, staining, and heat damage.

Over time, however, this type of varnish will crack off the surface, at which point you’ll need to recover the boat in varnish again.

4. One-part polyurethane varnish

Today, most varnishes use blends of synthetic resins such as polyurethane, phenolic, or alkyd polyester. Polyurethane is also known as urethane and is more durable than the other resins.

One-part polyurethane varnish produces just as good a finished result as tung oil and offers the same amount of protection, but is much more durable. Due to its strength, this type of varnish is often used for interior wood flooring.

Due to its rigidity, one-part polyurethane shouldn’t be used on highly flexible areas such as spars, as it can crack and be rendered useless.

5. Two-part polyurethane boat varnish

This varnish consists of two products that have to be mixed. Such as an epoxy resin – listed below, and polyurethane varnish.

This type of varnish is extremely tough, offers very good protection from moisture and UV damage, and helps protect areas prone to damage.

Two-component polyurethane coatings offer better results than single-component ones. In fact, they can guarantee greater resistance to abrasion and chemical agents, high durability, and higher conservation of the coating film.

Again, due to its hardness, two-part polyurethane boat varnish shouldn’t be used on highly flexible woo. That’s because it could crack, leaving room for water to damage the wood.

6. Epoxy resin

Epoxy resin can be used to coat timber, but it generally has poor resistance to UV light. Usually, another varnish tends to be applied over the top, as boats are exposed to a high level of UV rays, especially in the summer months.

At this point, we should advise you to beware of inexpensive yacht varnish sold in various DIY shops. Lower prices are usually an indication of extended drying times or poor long-term performance when on the water.

Specialist yacht insurance from Insure4Boats

Of course, there’s more than one way of taking care of your vessel. One of the most important forms of protection for your yacht is insurance – this is where we come in.

After taking such good care of your vessel and varnishing it to perfection, it’s vital to protect it if any issues occur. Our specialist yacht insurance covers the damage and theft of your yacht and includes Personal Accident cover if you have suffered a serious injury as a result of an accident whilst out at sea.

What’s more, as part of the Ripe Guarantee, we promise to provide you with great cover and fantastic service at the best possible price. We let you tailor your policy, so you’ll never pay for more than the cover you need.

Find out more about our specialist yacht insurance here.

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