Plaster Cloth by Woodland Scenics

Plaster Cloth is the easy, convenient method for modeling lightweight land contours and terrain base. The plaster-coated cloth creates a durable hard shell, designed to accept Earth Colors™ Liquid Pigment, paints, plaster castings and landscape materials easily, with realistic results. Use to fill seams or gaps around rocks, tunnels, and terrain to blend terrain features.
This can also be used for other crafts including body casting.

Woodland Scenics offer the plaster cloth in four arrangements. 

Single Roll - The original cloth. Packaged in resealable bag. size 20.3 cm x 4.57 m

Narrow Roll - Specially sized for small areas/projects, Risers, Inclines/Declines and Road Riser. Packaged in resealable bag. size 10.1 cm x 4.57 m

Triple Roll - Get three times as much. Perfect for large projects. Packaged in resealable bag. size 20.3 cm x 13.7 m

Sheets - Precut for convenience. Package doubles as a dipping and storage tray. size 30 sheets 20.3 cm  x 30.4 cm