Incralac is corrosion resistant, fast curing copper and copper-alloy clear coating designed by the International Copper Research Association and the British Non-Ferrous Metals Research Association for the conservation of outdoor bronzes ( Paraloid B-44 + BTA).  Now Incralac is a choice of many professionals, artists and many marine and military applications for protecting such metals as brass, bronze, copper and is intended for interior or exterior use. With an excellent balance of hardness, adhesion and filmtoughness Incralac has excellent resistance to UV light and resists yellowing and loss of gloss and clarity upon ageing. Product Specifications Sheet