Jomax Roof Cleaner and Mildew Stain Remover is a concentrate that quickly removes black streaks, dirt and mildew stains from roof shingles. Kills mold and mildew on tile, slate and metal non-porous roofs. Use Jomax Roof Cleaner and Mildew Stain Remover on asphalt, wood and composition roofs. Jomax is not intended for interior use.