Aves Apoxie Sculpt Epoxy Modelling Clay is used for model making/sculpting.
Probably a price match error as the price was £44.95 and is now £23.95.
It says there are only 8 left.
Here is the description from the Aves website:
Apoxie® Sculpt combines the features and benefits of sculpting clay with the adhesive power of epoxy! Its smooth, putty-like consistency is easy to mix and use. Self-hardens (No Baking); cures hard in 24 hours to a semi-gloss finish. Adheres to nearly any surface and is great for sculpting, embellishing, bonding and filling most anything. Accepts paints, stains, mica powders and more for a variety of finishing options. Sand, tap, drill, carve, lathe, etc. after set-up without chipping, cracking or flaking.