KoolCoats Butter Grade Flashing Patch is a premium elastomeric solution that combines waterproofing and UV stability with exceptional flexibility. Ideal for metal, BUR, mod-bit, and single-ply surfaces, it is perfect for applications including roofing, ducts, HVAC systems, windows, doors, moulding, and mobile homes. This patch exceeds ASTM standards, ensuring reliable protection and performance. Designed for use with elastomeric roof coatings, KoolCoats Butter Grade Flashing Patch offers professional-grade results for both interior and exterior projects.