Bosny No.33 RoofKote Waterproofing Coating Leak Sealer Spray 400cc A Bitumen Base Modified Polymer Black Waterproofing Spray. Improvements on what we are familiar with Bitumen Base Waterproofing Maintains Color even under the elements. Does not Melt on a Hot Day. Dries Extremely fast than Black Coal Tars. Stays effective for a long time. Directions for Use: 1. Surface should be dry, clean, free from dirt, and grease. 2. Shake well before using. Allows 2 to 3 minutes for second coat. 3. When finished spraying, clean spray nozzle immediately by turning can upside down and push spray button for 10 seconds. Color: Black Size: 400ml