<p>KARNAK 19 Ultra Rubberized Flashing Cement Caulk is the next generation -free flashing cement. Scientifically compounded with a selection of rubber reinforced asphalt,<br /> mineral fibers, and refined solvents. KARNAK 19 Ultra Caulk is manufactured to a heavy pliable trowel graded consistency.KARNAK 19 Ultra<br />Caulk provides a durable elastomeric coating of greater strength, excellent adhesion and high resistance to water and weathering.</p>