Tri-Film is an evaporation retardant which can be used on all types of flat work. Tri-Film is especially effective when placing and finishing operations take place in direct sunlight, high temperatures, and low humidity and high wind velocity. Tri-Film does not replace proper curing procedures. Tri-Film prevents the rapid drying of exposed plastic concrete, which cause finishing problems such as stickiness, sponginess, and unevenness, plastic shrinkage and cracking.