i have used 3 dash caps on projects and when installed properly work fine! cut away loose chunks of old dash pad,and i smoothed a little calking over the large holes. when glueing use a lot of criss cross,try not to blob glue. glue around complete hole for vents,vin etc. stack some weight on cover to have good contact while drying.final coat of vynal protectant,looks great. well,looks great for $100 solution to $900 problem!