View source for Roslag: a Norwegian method of protecting wood from moisture

Roslag is a traditional norwegian method to protect wood from moisture, fire and other risks.

== 1.Composition and Application ==

=== Composition ===
(1/3) Pine tar (Norwegian tar), (1/3) turpentine oil, and (1/3) linseed oil

=== Application ===
Initially 2 to 3 coats on dry wood (light layer), then 4 to 5 coats on wet wood to fully saturate the wood fibers.

== 2.Risks of degassing ==
The Risks only until several days after the application.

Gum turpentine (a natural solvent) evaporates rapidly during drying. This release is normal, is accompanied by a strong pine or smoky odor, and dissipates within a few days.

During the drying process (which occurs through oxidation upon contact with air and UV light), the pine needle oil releases a characteristic odor. While it does not emit toxic chemicals such as formaldehyde, it can cause a persistent odor that may recur during hot summer weather.

Linseed oil carries a risk of spontaneous combustion. Cloths or materials soaked in this mixture must be disposed of in water or safely burned. This applies specifically to the saturation stage.