Penetrol is a versatile blend of natural oils with a penetration power 3 times more than water and a powerful bonding ability. High in solids, non-toxic when dry, colourless and with low odour it is user friendly. Used alone as a primer/sealer or added to oil/alkyd based paint, varnishes and stains or metal and wood primers it enhances their inherent qualities and makes them stick to almost anything - even glass. Suitable for use with enamel paint only.