The Type 1 Bonded Fix is made of ABS, which is a relatively good plastic for bonding, and there are many structural adhesives suitable for a wide range of panel materials: e.g. a 2-part structural acrylic adhesive, a matched adhesive for solid surface (Corian®, Hanex®, etc.) or solvent weld for bonding to acrylic.
Epoxy resins, such as Araldite also work well.
We have also used MS polymer adhesive mastics with great sucess, such as Parabond 500, Soudal Fix-All High Tack/Turbo, Everbuild Stixall, Evostik Sticks like sh*t, to name a few; these are particularly easy to use, tough, strong and odour-free.
Generally, the button fixing screw will fail before any of the the adhesives mentioned give way.
A Type 1 Bonded has been tested (rebated in Corian® with matched adhesive) to destruction at an astonishing 625Kg, when the screw holding the button sheared!
When ‘face-fixed’ (ie. not rebated) using Parabond 500, the plastic of the Fix fails (not the adhesive bond) at approx. 200Kg.