Copper-based wood preservative solutions for exterior treated lumber products. Preservative solutions provide long-term protection from fungal decay and termite attack. There are two types of treatments: Copper Azole Type C (CA-C) and Copper Azole Type B (CA-B). The Preserve CA-C treatment is available with a built-in water repellent called Preserve® Plus. CA-C is available across the US, whereas CA-B is available in Canada. CA-C is made of 96.1% soluble copper that is 100% recycled, organic triazole co-biocides, tebuconazole, and propiconazole. CA-B is made of 96.1% soluble copper that is 100% recycled and 3.7% tebuconazole. These two types are replacing Preserve Alkaline Copper Quarternary (ACQ) because quarternary is in high demand for cleaning products due to COVID-19. Preserve CA can be used on lumber above ground, on the ground, immersed in freshwater, and splashed by salt water. This process replaces the traditional use of chromated copper arsenate (CCA) preservatives, which are highly toxic. The implementation of this technology could reduce the use of arsenic by 40 million pounds per year and chromium by 64 million pounds per year.
