Polyphase 678 Troy Preservatives / Biocides / Fungicides ADHESIVE >> Water-based SEALANT Polyphase 678 Polyphase 678 is engineered with low VOC technology to provide high efficacy against wood rot and other types of fungi while offering very safe handling characteristics without discoloration. Polyphase 678 offers significantly improved effectiveness and greater compatibility than conventional fungicides - with superior cost performance. Polyphase 678 features a wide range of compatibility in waterborne products, including adhesives, sealants, paints, stains, stucco, EIFS, and architectural/construction products. Low VOC fungicide. Used in waterborne products, including adhesives and sealants. Offers high efficacy against wood rot and other types of fungi, very safe handling characteristics, no discoloration, improved effectiveness and greater compatibility.