Black jack, 3.6 qt, white acrylic roof patch, elastic crack sealer & repair, stops leaks, long lasting flexible repair, best patch for white or aluminum coatings, use with reinforcing fabric, extra tough, flexible repair compound designed to patch splits, cracks & holes in roof surfaces up to 1" wide, water based, dries quickly to non-tacky surface, offers great adhesion to all coatings applied over it.