You will need some essential tools to replace DIY window glass. We recommend: Work gloves – For handling broken glass and protecting your hands. Safety goggles – To protect your eyes from shards of glass. Utility knife – For cutting through old caulking or sealant. Putty knife or chisel – To carefully remove the old glass and clean the frame. Caulking gun – To apply window-grade sealant for a tight seal. Window-grade sealant – For sealing the new glass in place. Screwdriver – For removing and replacing any window hardware. Tape measure – To ensure accurate measurements for the new glass pane. Suction cup lifter – To safely handle and position the new glass.