Does linseed oil strengthen wood fibers?
We have seen no evidence to support this claim. In fact, linseed oil is just a filler and provides very little – if any – waterproofing benefit. We also know that linseed oil is “mildew food”, as it is susceptible to mildew growth; particularly in warm and humid climates. Extra mildewcide is required in products which contain linseed oil, and this is not usually provided.
