If a crude sisal wax which has been produced according to the old method, is subjected to the above-mentioned decolorizing agents as above stated, the resultant sisal wax is much darker in color than when the starting material is a crude sisal wax produced according to my method. This is because the solvent extracts certain black impurities from the dry pulp, which the solvent does not extract from the aqueous pulp. The improved decolorizing sisal wax is therefore substantially free from the dark impurities of dry sisal pulp.