Frequently Asked Questions

How is pine tar produced?

Our pine tars are produced through the dry distillation of wood, primarily pine, in ovens. This is why pine tar is a totally natural product.

What colours are the pine tars available in?

Auson has six pigmented pine tars that all give matte, beautiful hues. We also have Pine Tar Oil, which is perfect for your wooden deck.

Do I need to add any solvent?

For planed wood, and also if you intend to spray paint, we recommend an extra dilution of 10–20% turpentine. (Pine Tar Vitriol already contains turpentine and needs no further dilution.)

Why does pine tar offer such good wood protection?

Pine tar is a product from our trees. By treating wood with pine tar, you are adding natural substances that the tree itself uses to protect itself from e.g. mildew and algae. Impregnation with pine tar also prevents moisture penetration, instead allowing the wood to breathe. This helps prevent the wood from drying out and cracking.

In what weather and at what temperature can I paint using pine tar?

We recommend breaks and a temperature of at least 10 degrees. It is then that the tar products are easiest to work with, quickly permeating the wood. It is important that the wood is completely dry during treatment.

What do I need to do before I start painting?

It is important to remove algae and mildew and make sure that the wood is dry before you start painting. Wood surfaces that have already been treated with our pine tars only need to be brushed clean of dirt and dust. A wire brush should be used on wood that has previously been limewashed to get rid of any loose or flaking paint. Finish off by brushing the entire surface with a softer brush or broom. Stir the contents of the tin before you start and several times during painting.

What do I need to consider when painting?

Painting using pine tar is no different from using other paints in terms of how you paint. But it is good to use a wide brush – preferably 70–100 mm wide. Also avoid layers that are too thick. Stir the contents of the tin to distribute the pigment in the pine tars and achieve a uniform colour.

How fast do the pine tars dry?

This depends on the weather and wind. But they generally take 4–6 weeks to dry.

How many coats should I apply?

Apply at least two coats to achieve the best water protection and colour. Since the first coat of paint provides adequate protection, it is possible to wait for up to one year before applying the second coat if you need. Remember that the first treatment should be completely dry before you apply another coat.

How long will the colour last?

We recommend that you repaint after 5–10 years. This time span depends on numerous factors including the climate, the wood quality and where you live. If there is algae or mildew on the wood, it is important that you remove this, since merely brushing off dirt and dust is not sufficient. Then all you need to do is paint.

How long does the tar smell linger?

The smell will fade considerably in just a few days. But we usually say that it will linger for around a month after painting.

Can I repaint my house if it has been previously treated with traditional limewash?


Can I use the pine tars on other wooden items in addition to building façades?

Yes, the colours are also well suited to boathouses, jetties, flower boxes, poles, fences, etc. Almost all wood that has not previously been painted using modern paint and that is outdoors.

Do I need to use stainless steel nails?

No, none of our pine tars contain iron sulphate (vitriol) that will cause nails and tin to rust. Normal galvanised nails can be used.

Can I use any other paint than tar if I change my mind?

No, you cannot use any other top coats since tar often “bleeds” during warm weather and this means that a modern paint will struggle to adhere to a surface that has previously been tarred.

SLC UK Limited
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