utilized will have an average fiber diameter of between about 6 to 15 microns the glass fibers impart temperature stability and strength to the inventive mat any commercially available polyolefin fibers may be used in the present invention polypropylene fibers are presently preferred preferably whatever polyolefin fiber employed will have a filament size in the range of about 3 to 15 denier per filament and a fiber length of about 0 25 to 1 5 inches the polyolefin fibers are used in the invention to increase elongation of the mat i e moldability and to impart a tackiness quality to the mat which assists the latex binder polyamide fibers polyester fibers or mixtures thereof are also utilized in the present invention nylon fibers of 3 0 to 6 0 denier per filament and of from 0 25 to 1 inch in length are preferred the polyamide and polyester fibers are utilized in the inventive mat to increase its strength the latex binders employed in the present invention are those which will cross link at temperatures broadly in the range of about 75 u00b0 300 u00b0 f and preferably in the range of about 100 u00b0 to 250 u00b0 f the cross linked latex binder imparts balanced.