Solarez UV Dual-Cure Polyester Sanding Resin Clear, UV Stable, Cures Bone Dry - Made in the USA Modified PE Resin - Formulated for "hot coats" Surfacing Agent Added - to assure a dry surface cure Resin Cures Exceptionally Dry - unlike other UV cure resins that cure tacky. A low styrene emission, orthopthalic polyester resin that is ultraviolet curable. It rapidly cures (3 min.) upon exposure to the safer UVA light (365-400 nm.) amply available in natural sunlight and low-wattage fluorescent suntan bulbs. It is enhanced with UV stabilizers to greatly improve its weatherability. It also has a “surface agent” that suffocates the surface, allowing it to cure bone dry and give it excellent sanding properties. Curing commences within 30 seconds of exposure to mid-day sunshine in non-polar latitudes. Ambient temperatures as low as -20°F or as high as 120°F have little effect on cure time or physical properties of Solarez.