NU KLAD 114-35/03 PART A|Ameron's Nu-Klad 114A is an epoxy filler compound used for steel, formed concrete or concrete block. It is a 100% solids compound, used to fill holes, voids and surface discontinuities up to one inch across as mesured in their largest dimension. A single application will fill or seal most air bubbles and holes, and can even provide a smooth surface on concrete block. It can even be used to fill pits, voids or seams in steel or concrete water tanks (potable tanks should be topcoated with an approved lining). Packaged in a 20-lb. can.