Polytop 50/50 Top Shelf Polyurea Concrete Countertop Sealer Testimonial Poly Top 50/50 Concrete Counter Top Sealer Matt B. of Prep Concrete Polishing sent us this beautiful photo of a concrete and wood countertop he created using our poly 50/50! Thank you, Matt! I did a concrete and wood countertop using your poly 50/50. It turned out spectacular! Matt B.