This simple solution prevents inside corner cracking when installed against a ceiling or concrete deck that may be subject to movement, to be used alongside backing materials in the head-of-wall gap for a code-compliant assembly. Its flexible gasket compresses and expands, providing protection for up to ½” of deflection, while its tear-off strip leaves a clean finished edge. Features Prevent drywall cracks Easy to install Built to last Installation Guides Flat Deflection Bead Installation Guide General Corner Bead Installation Instructions Submittal Sheets Flat Deflection Bead Submittal Sheet R1 SDS SDS - Rigid Vinyl with Flex1-4 01Aug2018 "9230 Flat Deflection Bead" (https://skfb.ly/oxpDw) by Trim-Tex is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/).