Mandrels

Polylok offers a wide variety of mandrels to fit our seals. By using a combination of mandrels or cutting them to size we can accommodate wall thickness from 1½” - 9”. Note: Mandrels should be cut 1/8'' less than your wall thickness. Our mandrels are made from a polypropylene composite which allows the mandrels to maintain their shape even during the most demanding applications. Each time you cast a Polylok Seal into your tank, you can be assured you will get a watertight connection.