Polylok, Inc. is an international supplier of plastic injection molded products for the precast concrete and onsite wastewate ... r industries. Our home office is Wallingford, Connecticut, and we have partnerships with several supply houses across the United States and Canada. Unlike most of our competitors, we design, manufacture, and ship our products from our Wallingford location. In addition, we hold over 75 patents and produce over 200 products for the precast, drainage, and onsite water industries. read more