Tunnels can be made in a variety of ways.Ready Landforms are an easy way to add a tunnel. They are preformed, landscaped and ready to place on a layout. Available in HO and N scales and straight or curved designs.
Self-supporting Shaper Sheet is another easy way to add a tunnel. Form into tunnel shape and arrange over track. Cover in Shaper Sheet Plaster and add landscape materials. For added realism, paint underside of Shaper Sheet to resemble blasted rock. Use 1/4" Foam Sheets or 1/4" Modeling Sheets to make tunnel walls and roof. Use No-News Paper or newspaper to add paper wads around the tunnel foundation to model terrain, and add a double layer of Plaster Cloth to form a hard shell.Use the Tunnel Liner Form to mold tunnel sections from Lightweight Hydrocal, Shaper Sheet Plaster or Super Strength Plaster. Connect sections together with Plaster Cloth to form desired length of tunnel.
Plaster castings can be attached to Modeling Sheets with Foam Tack Glue and the “contact gluing method.” Rough up the surface of the Modeling Sheet with #220-grit sandpaper and wet the back of the plaster casting with water. Apply Foam Tack Glue onto the Modeling Sheet and the back of the casting. Let set until the glue dries (maximum working time is one hour), and then press the surfaces together. The glue will bond instantly.
When using Modeling Sheets as a base for a water feature, we recommend applying a double-layer of Plaster Cloth. Modeling Sheets are made of extruded polystyrene (XPS), which outgasses very badly. If not sealed with Plaster Cloth, the foam will outgas into the Realistic Water and cause bubbling.
When applying Plaster Cloth onto the Modeling Sheet, wrap it around the edge and under the Sheet to secure it in place.
Our Foam Sheets are expanded polystyrene. Our Modeling Sheets are extruded polystyrene.