Gardner, qt, 28 oz, white, fill level leak stopper rubber flexx liquid rubber coating, tough synthetic rubber coating designed to seal & waterproof roofs, walls, gutters, interior & exterior foundations, boats, tents, machinery & buildings, & below grade applications, creates a water, moisture & air barrier, extra tough finish will not peel or crack, bonds to metal, masonry, wood, painted surfaces, & most building products, product is not paintable, approximate coverage: 65 sqft smooth surfaces, 50 sqft rough surfaces.