jonny round boy said:
I think part of the problem with regard to the scepticism is the term 'glue gun'. It's not a glue gun, it just looks similar (which I guess is why the OP referred to it as such). I'm guessing the sticks are some kind of wax filler rather than adhesive.
Actually, I think they are just glue guns as you can also use "normal" glue sticks in them.
The "filler sticks" appear to be a polymide adhesive with specific properties that make it suitable for the filling of voids etc.
If you take a look at
http://www.konig-uk.co.uk/konigshop/melt-filler-sticks-pack-sticks-p-113.html it lists three different types of filler, with different "hardness" and melting points, so I presume any "glue gun" that can work at these temperatures would be suitable - even my cheap Dremel glue gun takes 11/12mm sticks and works at 120 and 195 degrees so *should* be suitable. Might just get hold of a few sticks and give it a try...
813 Series Filler
This range of fillers comprises the following colours; White, Knot, Ash, Pine, Beech & Oak. This is the most flexible of the three different grades of filler and has a melting point of 140°C. This filler can be sanded after the surplus filler has been removed.
134 Series Filler
This set comprises 4 different colours, Black, Walnut, Pine Light and Mahogany. It has a higher melting point of 160°C. This is less flexible than the 813 series but it is a harder compound and slightly easier to cut off. It can also be sanded using normal abrasives.
162 Series Filler
This is the hardest of the compounds and has been specifically designed for the flooring trade so that excess filler can be removed by belt sanders rather than having to cut surplus filler first using the cutting tool. It is available in the following colours; Transparent, Mahogany, Rosewood & Wenge. This filler has a melting point of 190°C.