Over the course of a tops life, the suns UV rays will fade and dry out any unprotected surface. To prolong its color, Forever Black Black-Top contains UV protectants and it is water repellant. This combination of restoration and protection will keep your top looking its best for up to 12 months. Forever Black Black-Top is an instant solution to years of UV degradation. Black-Top should only be used on vinyl tops, Bimini tops, and tonneaus. It is not recommended for fabric.