There is no set maximum thickness at which TotalBoat UV Cure Clear Resin can be applied. However, the thicker it is applied, the longer the UV exposure required to cure the resin. Thicker applications being cured with more intense light sources (such as the sun) may also generate excessive heat, to the point where it may not cure with a cosmetically desirable surface, or negatively affect the mold. If ant tints or colorants have been added, this will further extend the cure rates. Curing UV Cure Clear Resin in layers is the best way to make thicker applications.