Wood preservatives are available in many different forms today although they are basically doing the same job; spirit based or the more environmentally water based preservatives, all of which will be deep penetrating. The can be used on new timber or old, interior or exterior, for wet rots, dry rot or woodworm. We have the right product for whatever you want to treat and have listed further information with each product to help in your selection but if you require more information please call our technical help line.