Design Polymerics 1030 Water Base Duct Mastic Sealant Pail 0.50-Gallon</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Low to high velocity air duct sealant， Color- Gray</li><li>Used for permanently sealing sheet metal and flexible duct system joints</li><li>UL-181 listed rigid fiberglass and flexible air ducts</li><li>Water based non flammable fire & weather resistant</li><li>Consult your local building codes for approved installation practices</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/41T1NT2KaOL.jpg' noproxy></br>