Lord Fusor 804HD Lord Fusor High Definition Hd Seam Sealers, Gray Permanently maintains a high definition appearance&#44; matching OEM quality and look Duplicates all OEM beadable&#44; brushable and sprayable seam sealers&#44; wheelhouse and sound dampening Makes use of Silane Terminated Polymer &#40;STP&#41; Technology&#44; and have been recommended by both Can be spray applied or applied with a manual caulk gun Fusor HD Sealers meed SAE J400 Chip Resistance testing and are approved to replace underbody coatings