can linseed oil be used as a sizing/sealing agentApproveRejectUn-ApproveSubscribeUn-Unsubscribe
Question asked 2019-11-23 01:43:43 ...
Most recent comment 2019-11-23 10:59:02
Sizes and Adhesives
A poster at the Wet Canvas forums recounted priming a panel with linseed oil. I recommended caution, never having heard of, or used, this technique. Others supported the practice, and said linseed oil would preserve the panel, and would dry to form a good sealant, suitable for painting. An internet search reveals no definitive argument one way or the other. I wonder is there a "last word" on the subject? Cheers!
Answers and Comments
It is not clear if you intend to prime wood with only linseed oil or pigmented linseed oil. If your question is about using an oil primer or ground composed of linseed oil (pigmented linseed oil) on wood, then it does form a good substrate for oil painting.
One thing needs to be clarified: linseed oil does not 'seal' wood, as in it does not prevent moisture from entering the wood. There are no coatings known today that act as an impervious barrier to vapor and gas. Each coating has different properties in mitigating the difussion of water vapor and gas.
Linseed oil has long been used as a wood finish, but it is not effective, especially unpigmented, as a 'sealant'. It can be used as a substrate for more oil paint, but if the goal is to provide a clear base, allowing wood to be exposed, one must be aware that wood will change its color over time, even under a coat of linseed oil.
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