Concrete floor polish with stain blocker Duro-Polish Plus offers the same benefits of Duro-Polish with the added advantage of a stain-blocking additive. As a result of this additive, this polish provides stain protection from the most common stain-causing agents found in grocery stores, restaurants, warehouses and distribution centers. Duro-Polish Plus will not be stained or removed by hot dripping oil, making it ideal for use in food preparation areas. Duro-Polish Plus is ideal for use on liquid silicate or siliconate hardened concrete floors because the unique polymer formulation penetrates deep into the small surface pores of hardened concrete to create a resilient finish resistant to wear from foot traffic or scrubbing.