Yes, it's true they do have drying agents/solvents. Can also have other drying oils besides linseed oil too. So no, most aren't 100% "natural". ~Lootvik~ >Hi cob list >what is the deal with boiled linseed oil.. is this a natural product. I >have heard that certain brands purchased in hardware stores have some >toxic ingredients. Can anyone comment. > >Thanks > >Rob Krueger