CA-C and CA-B Preserve® Wood Preservative (Previously ACQ Preserve®)
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.