of ordinary skill in the organic chemical arts suitable saturated fatty acids include those comprised of twelve carbon chains or higher their esters alcohols and transition metal salts in the preferred embodiment the waxy solid comprises stearic acid c 18 fatty acid methyl stearate ester of c 18 fatty acid stearyl alcohol alcohol of c 18 fatty acid zinc stearate zinc salt of c 18 fatty acid palmitic acid c 16 fatty acid myristic acid c 14 fatty acid lauric acid c 12 fatty acid or paraffin solid hydrocarbon paraffin is as effective for pressure treatment of wood 6 as the saturated fatty acids paraffin has the disadvantage that it is usually derived from petroleum products whereas the fatty acids are derived form renewable resources such as natural oils and fats it therefore may be more desirable to use the fatty acids the waxy solid 14 fig5 may include one or more active ingredients in the preferred embodiment the active ingredients are oil soluble and are dissolved in the waxy solid suitable oil soluble active ingredients are well known in the wood treatment art one of the active ingredients included in the waxy solid is an acid neutralizer although acid neutralizers have been used in paints and coatings for wood they have not been used in pressure treatment processes used in preserving woods such.