I have a flat tar roof. Is there a paint to lighten up the black tar?

Paint will no stick to the tar like you think it may but this will Flat Roof Repair, Metal Roof Repair, Roofing Products, Elastomeric Roof Coating, Industrial Coatings - Ames Research Try thr snow sealer

U can use silver coat. Used to reflect suns heat. Pick up at roofing supply.

Chuck