PQ-8® Fungicide Concentrate PQ-8 AND PQ-80 ARE THE ONLY ANTI-SAPSTAIN PRODUCTS WITH EPA APPROVAL FOR FOOD CONTACT. PQ-8® is a fungicide concentrate formulation designed for outstanding, dependable control of sapstain and mold in freshly cut lumber and timber. It is highly water soluble and can be applied to wood products by dip, spray or flow coat. PQ-8 … Continue reading PQ-8®Fungicide Concentrate