Any traditional park deck needs to be protected with a waterproofing membrane to prevent leakage. This leakage, especially in wintertime when salt is used to de-ice, will cause deterioration of the concrete and the rebar. Also the joints between the concrete need to be sealed and remain permanently flexible, since an expansion joint are designed to expand and contract! BASF developed a system for this exact application based upon a permanent flexible aromatic spray able Polyurea with an antiskid finish using the same material, this system is CE marked conform the EN 1504-2 and yields a class 3 antiskid rating, and this polyurea has a OS11a certificate.