Abstract: A penetrating concentrate containing a biocidal amount of a biocide uses a penetrating carrier vehicle containing an emulsifiable copolymer of a cyclic diene and a polymerizable, unsaturated glyceride. For biocides, such as iodopropargyl carbamate, which otherwise requires use of significant amounts of co-solvent to disperse, is directly soluble in the copolymer thereby eliminating or at least substantially reducing the need for co-solvents to assure stability of the biocide in the formulation. The concentrate also exhibits a low level of volatile organics.