Guaranteed Waterproofing was contracted to perform comprehensive tunnel waterproofing for the LDS Church in Salt Lake City, Utah. The project involved sealing over 2,500 linear feet of cracks and joints using Xypex waterproofing systems. To ensure complete protection against moisture infiltration, the team applied Xypex Megamix 1 to coat the tunnel walls and Patch’n Plug to repair structural voids and surface defects. This project demonstrates our expertise in subterranean waterproofing under complex site conditions.