Polyphase 662 Troy Preservatives / Biocides / Fungicides ADHESIVE >> Water-based SEALANT Polyphase 662 Fungicide/algaecide Designed specially for water-based systems, Polyphase 662 protects systems against the damaging effects of fungi and algae while offering a reduction of VOC's and resistance to yellowing. It is a cost-effective product offering broad-spectrum activity and excellent toxciology profile. Polyphase 662 offers protection against discoloration caused by blue stain, mold, and algae. Fungicide/algaecide. Used for water-based systems, such as adhesives and sealants. Offers reduction of VOC's, resistance to yellowing, broad-spectrum activity, very good toxicology profile and protection against discoloration caused by blue stain, mold, and algae.