Asphalt surfaces are in a constant state of deterioration. Heat, cold, rain and the sun’s ultraviolet rays break down the binders that hold the surface together. GuardTop stays black longer, protects your asphalt from environmental exposure, and inexpensively prolongs a smooth, high-quality appearance that is easy to maintain. Decades of performance, longevity and eco-friendliness have won the confidence and trust of school districts. Many school districts specify the use of GuardTop by name.