DescriptionOatey® Sideflash™ Vertical Flashings are designed to seal around piping, electrical and other utility penetrations through outside walls. The product features a hard plastic panel with an elastomeric collar that seals around the pipe. It is designed to be installed over the house wrap or building paper to become part of the building envelope. Oatey products ahve earned the trust of plumbing professionals for over 100 years.