The square ridges in the roof would prevent the sunroof from fitting flush against the sheetmetal. Therefore, foam cubes were plugged into the gaps created by the square ridges and a putty-like sealant was rolled over and along the edges of the hole to make the sunroof as watertight as possible. Glass cleaner was used to clean away unwanted sealer residue.
Chevy Colorado Ragtop Install - Let The Sunshine In