Copper Organic Water Based treatments are applied using low pressure and high pressure treatment plants and the end product can be suitable for Use Class 1, 2, 3 & 4 depending on the specifics of the process used. Copper Water based chemicals are usually applied using a Bethel (full cell) cycle, with pressures of up to 14barg to ensure a deep penetration of the chemical. This helps the end product to better withstand all the additional enemies which attack timber which is being used outdoors, such as insects, fungi & mould.
Please see table below of how Use Classes are defined: –
