Daler Rowney
Aero Perfix

An odourless aerosol spray that fixes charcoal and pastels. It easier to use, simply hold the can about 12inch away from your work and spray on an even coat of fixative. It dries quickly to prevent smudging and, once dry, it's completely colourless so you can go on working on top of it.

Note: Aerosols must be stored at normal room temperature.