Hiya Shaun.... try just using glue....how many layers are you applying? ...I must say, I`m surprised that the strong tapes are breaking down.....just try glue on it`s own...you should get more than 3 days..by the way .. are you happy enough with the partials? I know you thought the density was `off`? Just curious...... is the weather very hot where you are too ? That might have a bearing on the bond-duration. Paul.