Spray Painting Facades

Tips for Using a Paint Sprayer

If you have a larger object to paint, spray painting the panel can be convenient. When spray painting wooden facades, it’s always recommended to follow up with a brush stroke to ensure the tar penetrates deeply into the facade.

It shouldn’t drip, and it’s important to spray the paint evenly. It’s also crucial to continuously stir the paint in the bucket so the pigment doesn’t settle at the bottom, especially when using Tar vitriol.

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

Tar vitriol is ready for spraying directly, use HEA 411. If a smaller paint flow is desired, use Fine Finish 310-308. However, this nozzle produces a bit more overspray.

Genuine Wood Tar and Kiln-burned Wood Tar must be thinned with about 20% turpentine or alcohol 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, making it easy to spray and compatible with Wagner’s smaller machines such as the Control Pro series. This paint can also be sprayed with an HVLP machine, e.g., W 590. It’s important to note that an HVLP machine produces more overspray than an airless machine.

The weather during the test was quite cool, which gives the paint a slightly 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 a line nozzle.

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

If less overspray is desired, albeit at the cost 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 of around 80 bar. It could probably be lowered a bit more, but at the expense of a poorer spray pattern. However, one should always aim for as low a pressure as possible to minimize overspray.

Tradition and Innovation since 1928

Auson was founded in 1928 and is still a family-owned company. Our traditional and sustainable products based on wood tar are leading in the Nordic countries. Tar is a natural product that is still the best and most sustainable way to protect and care for wood. According to many, it’s also the most beautiful.