There is a lot of confusion as to what a temporary or a permanent joint is. Basically a permanent joint is one that is intended to last the life time of a product wherelse a temporary joint is one which is intended to hold the item together but is removable easily at any stage without causing too much damage to the main product.

When you join materials you can do so permanently or temporarily.

Permanent ways of joining

Temporary of joining materials

Adhesives, nails, rivets Brazing, Soldering, Welding, Wood Joints Butt, Dowell, Halving, Housing, Mortice&Tenon, Dovetail, Comb/Finger Joints, Tongue&Groove)

Screws, Nuts, Bolts, Knock down Fittings, Double Sided Tape, Blue Tac