There are various modelling putties available, for which there are various uses in the hobby: to sculpt masters, to fill in gaps, create groundwork or convert kits.
We stock Magic Sculp, which is a two-part epoxy putty - a hardener and a resin - to be mixed in equal parts. This takes about 2 hours to air-dry (depending on room temperature). Once hard it can be sanded, carved, filed, etc.
The other choice is ProCreate, another two-part epoxy putty, which can be used to sculpt finer details. It is ideal for smaller figures (28-32mm) and allows for more flexibility taking about an hour to air-dry.
Finally we have Stick Putty to create armature and larger scale projects. This dries rock hard in a matter of seconds. It is ONLY suitable to bulk out armature, before applying Magic Sculp or ProCreate.
Each putty has its own unique qualities and each modeller has to find the right blend to suit their needs. Magic Sculp and ProCreate can be mixed together to create an excellent sculpting medium.