APOC 581 silicone roof patch is a premium, highly flexible and durable repair product for use with silicone coatings. APOC 581 can be applied in a wide temperature range and can be used to seal flashings, skylights, vents, curbs, penetrations, seams, HVAC units and other types of repairs. APOC 581 provides excellent adhesion to most common building materials and will withstand extreme weathering. Not recommended for use with acrylic, aluminum or asphalt coatings.Ultimate flexibility and durability – for longest lasting repairWide application temperatures (35 to 110 deg F)Resists ponding waterFor use with silicone roof coatings