Spray Painting Facades

Tips for those who Will Paint with a Spray Gun

If you have a larger object to paint, it can be convenient to spray paint the panels. When spray painting wooden facades, it is recommended to always brush over with a brush to ensure the tar penetrates properly into the facade.

It must not run and it is important to spray the paint evenly. It is also very important to stir continuously in the bucket so the paint pigment does not settle at the bottom, especially when it comes to Tar Vitriol.

Red Tar, Green Tar, Brown Tar, Black Tar and Black Brown Tar are pre-diluted and can be spray painted directly according to recommendations in the report.

Tar Vitriol is ready to spray directly, use HEA 411. If a smaller paint flow is desired, use Fine Finish 310-308. However, this nozzle produces slightly more spray mist.

Genuine Wood Tar and Dal-burned Wood Tar must be thinned with approximately 20% turpentine or spirits before spraying. Use nozzles as specified in the report.

Test of Wagner SF23 Pro with Auson Red Tar

Red Tar is a product with low viscosity which makes it easy to spray and also works with Wagner’s smaller machines such as the Control Pro series. It is also possible to spray this paint with an HVLP machine, for example W 590.b. Important to know is that an HVLP machine produces more spray mist than an airless machine.

The weather conditions during the test were quite cool, which gives the paint a somewhat higher viscosity.

Our Red Tar test was performed with Wagner’s SF 23 Pro, which is an airless machine with a diaphragm pump. We tested different nozzles from the HEA range as well as line nozzles.

We concluded that the HEA 411 nozzle provided a good spray pattern and gave an appropriate paint flow for this rather thin paint.

If you want less spray mist, though at the expense of a good spray pattern, a line nozzle can be used. We used size 415 and one could go down to 411 without it becoming too small.

We used a pressure around 80 bar. It could certainly be lowered somewhat, but then with a poorer spray pattern as a result. However, one should always strive for as low pressure as possible to minimize spray mist.

Tradition and Innovation since 1928

Auson was founded in 1928 and is still a family business. Our traditional and sustainable products with wood tar as a base are leading in the Nordic region. Tar is a natural product that is still today the best and most sustainable way to protect and care for wood. According to many, it is also the most beautiful.