We have 20 years history to produce this Lens Coating Chemical. These Lens Coating Chemical can enhance the performance and appearance of your lens. This chemical fromed from a kind of highly cross-linked silicon polymer coated on the PC. It used for surface coating makes the PC surface hard and scratch resistance. It has Excellent scratch resistance: The liquid display hard coating properties during the steel wool test and Bayer test. And it has excellent durability: This liquids show little deterioration from heat(130-200) and cool-50 light the point reach more than 90% visiable area)They also have stability against various chemicals.Excellent stability and preservation . the liquids can be transported and stored requiring no special conditions. They can be stored when they keep cold. plastic drum 22kg