Method and means for attaching insulation to a mold

A clip for fastening insulation to a mold, said clip comprising first, second and third portions each having first and second opposite sides, said first and third portions being integral with opposite ends of said second portion, said second portion extending (a) away from said first side of said first portion at a right angle, and (b) away from said second side of said third portion at a right angle, and said third portion having at least one tang projecting outward from said second side thereof, in order that when a board-like piece of insulation is placed against a surface of a mold, said clip may be pressed against said mold and said insulation so that said second side of said first portion of said clip will engage said mold surface while said second side of said second portion of said clip and said second side of said third portion of said clip will engage said insulation and said at least one tang will penetrate into said insulation, whereby said clip will hold said insulation to said mold when said first portion of said clip is attached to said mold.