Iron sulfate is used to colour wood into a grey tone in exterior wood surfaces and is used as ingredient in the manufactory of Nordic Red Paint.
Iron sulfate is mixed into hot water (2,5 kg of powder to 15 – 20 L of water) until the powder is well mixed into the liquid. The wooden surface is treated with a generous amount of the mixed iron sulfate water. After this the wood is left in sunlight. The final shade of grey will be visible approximately after 2-3 months. The moisture content of the wood, the age of the wood, the quality of the wood and water etc. will all influence the final tone. The best surface absorption is on a sawn timber surface.
Since iron sulfate is not a premade product or a surface treatment agent, we do not take responsibility on matters concerning the use of the product. If you are unsure, we recommend other products, such us our paints and other surface treatment products, to be used instead
Coverage: Planed timber 8-10 m2/L, rough sawn timber 4-5 m2/L.
FeSO4 – CAS-nro 7720-78-7