March 25, 2022

Difference between boiled and double boiled linseed oil

What is boiled linseed oil

Boiled Linseed Oil is not literally “boiled,” as the term implies; instead, it has been chemically altered to promote rapid drying. Slow-drying oils are beneficial, but in cold weather, regular linseed oil might take weeks or even months to cure properly, which is too long. Boiled Linseed Oil will dry in days, depending on the weather. Boiled Linseed Oil gives fresh or stripped bare interior wood a mellow, patinated finish. It’s a high-quality oil identical to Raw Linseed but has had hot air blown through it to speed up the drying process.

What is double boiled linseed oil

Double Boiled Linseed Oil has a dark amber color with a strong aroma. This oil is primarily suitable in the home. It has high water resistance and acts as a rust preventative. When compared to raw linseed oil, it has a high viscosity. Linseed oil that has been double-boiled can be used as a finish or blended with other varnishes or solvents to create unique finishes. 

On preparing meals, surfaces, and wood bowls, use double boiled linseed oil. It can also be used as a typical wood treatment to provide all types of bare wood with a durable, long-lasting surface (except exterior oak). Treat terracotta tiles and other stone surfaces with Double Boiled Linseed Oil.


  • Linseed oil, both boiled and double-boiled, is excellent for use on naked timbers in the interior and exterior.
  • Compared to raw linseed oil, boiling and double-boiled linseed has a faster drying time; they both go through the boiling step throughout the manufacturing process.


  • Raw linseed oil, stand oil, and metallic dryers are combined to make boiled linseed oil (catalysts to accelerate drying). Double Boiled Linseed Oil includes no solvents or other additions. It takes about 24 hours to dry if you follow the advice on the label.
  • In comparison to boiled linseed oil, double-boiled linseed oil is substantially darker.
  • Linseed oil that has been double-boiled is primarily suitable indoors. When compared to boiled linseed oil, it has a high viscosity. It has high water resistance and acts as a rust preventative.
  • Boiled linseed oil goes through the boiling process once, while double-boiled linseed oil goes through the procedure twice.

How to make boiled linseed oil

Raw linseed oil, stand oil, and metallic oil drying agents make up boiled linseed oil (catalysts to accelerate drying). Boiled Linseed oil dries rapidly. Most of the time, it contains heavy metal driers.

Boiled linseed oil comes from chemically modified metallic driers and raw linseed oil for a faster drying period. To manufacture boiled linseed oil, stand oil must combine drying agents and raw linseed oil.

Raw or boiled  linseed oil for outdoor wood

Linseed oil is a good option for finishing outdoor objects if you’re seeking natural oil. It’s also suitable for use as an oil painting base. And this is due to the more extended drying period, which allows the paint layer to level itself before drying, resulting in a smoother surface.

However, boiling linseed oil is a superior alternative for finishing furniture to protect the wood and enhance its appearance. It dries faster, allowing the table to be utilized or touched in just a few days.

It’s not a good idea to use boiled linseed oil outside. It dries faster than raw linseed oil, applies evenly, and dries in 12 to 18 hours for a smooth, consistent finish. It repels water and keeps the surface from chalking. It’s safe to use on most antiques and furniture finishes. You require several coats of linseed oil to get the desired finish, with ample drying time between each coat. Linseed oil is also not suggested for use on exterior or exposed woods.

Although raw linseed oil is excellent for preserving wood and stone, it is more difficult to utilize than boiling linseed oil or other oils. The biggest concern is drying time, and if it is applied too thickly, in low weather, or over a damp cloth, it may not dry. The treated object is sticky in certain situations.

Raw linseed oil

Raw linseed oil comes from pressing flax seeds without additional treatment or blending. This sort of oil dries slowly, is water-resistant, and does an excellent job of maintaining the item to which it is applied. Historically, “unboiled” linseed oil was used as a stand-alone coating, for example, on paintbrushes, ropes, stones, and wood. Additionally, it is helpful as a component of oil paint.

Raw linseed oil uses

Linseed oil is traditionally helpful for cricket bats, but it can also be used for gutters, chopping blocks, and other objects if given enough time to dry. Although raw linseed oil is excellent for preserving wood and stone, it is more difficult to utilize than boiling linseed oil or other oils. Because it takes weeks to cure fully, it’s essential on items that can dry in a few days.

polymerized linseed oil vs boiled

Linseed oil, polymerized linseed oil, and boiled linseed oil are all produced from the flaxseed plant, but they have been treated differently and to different degrees.

Commonly used as a wood finish, boiled linseed oil contains certain potentially harmful drying chemicals. Polymerized linseed oil combines the best of both worlds: it’s pure, non-toxic, and dries quickly.

Polymerized Linseed Oil is made by heating raw linseed oil to over 300°C (572°F) without oxygen over many days. A polymerization reaction happens during this procedure, raising the oil’s viscosity and reducing drying time. 

Polymerized boiled linseed oil is a type of boiled linseed oil. It comes from boiling raw linseed oil in a vacuum for a few days at around 300°C, resulting in a thick oil with a more elastic coating than conventional boiled linseed oil. The thickness of stand oil makes it difficult to deal with over an enormous surface area; therefore, it’s not commonly helpful for wood treatment. Artists typically use linseed oil to obtain a consistent finish or perform specific painting methods.

Drying additives (either petroleum-based or heavy metals) are added to boiling linseed oil to make it a more viable option for finishing wood furniture.

Naphtha, mineral spirits, and di propylene glycol monomethyl are some of the petroleum-based siccative compounds used to shorten the drying period of linseed oil. The most common metal siccatives detected in boiling linseed oil are cobalt and manganese. It is the least food-safe because of the drying chemicals added to boiling linseed oil.

There are no additives in polymerized linseed oil because it has been heat-treated.

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