i have also used the dap contact cement on a few projects and the tolex has held up fine on all of them. no melting occured on any of the retolexed pieces
SOLVENT BASED contact cement is flammable & requires proper ventilation, and shouldn't be used if there are open flames near the area (furnace/water heater etc). WATER BASED contact cement does not have these issues. Both types of CC need to be applied to each surface: the cab & the tolex. Whichever type is used, be sure the cement is not out of date. CC has a shelf life, and not all retailers rotate their stock . Contact the maker to be sure the cement is fresh.