DMP (2,2-Dimethoxypropane, #E13280) is a quick and inexpensive material for processing tissue preparations for SEM. It requires no special equipment as critical point drying does and it is not complicated as with freeze-drying or freeze-substitution.

Reference: Weyda, F. (1992). Simple Dessication Method for Scanning Electron Microscopy Using Dimethoxypropane. Proc. EMSA/MAS/MSC/SCM p. 760.