There are various plastics, which melt at different temperatures. Pattex sticks at high temperature with good adhesive strength and solid bonding. These pens here already melt at about 150 degrees C and are very soft. Which can be seen on the rubbery "Prengeln"! Bonds must be fixed for a long time, so in general they are fixed. For bonds that are to be removed later without any problems, they are suitable. Less firm grip! Lasting bonds NOT become possible!