Welcome to Blackthorn, Inc. Our products include, but are not limited to, hole formers, specialty and custom fiberglass products, a wide variety of magnetic attachment solutions, concrete vibrators, wire cage welder replacement parts, an extensive line of rubber gaskets and seals for the concrete industry, a broad range of plastic rebar chairs, clips, wheels, slab bolsters, and accessories, chemicals, patches, grouts and epoxies, saw blades, new and retipped core bits and fiberglass molds for the manufacture of small concrete products.