For Sand & Gravel
Bond the material with a mixture of one part glue to two parts water.
For Rocks “1045”
Some modelers prefer to use casting for their formations and then color them taster. Our Red Rock would then be used as talus martial at the base of the formation. Arrange the material into position and wet with water that has a drop of liquid soap added to it for proper dispersion. Drip on mixture of diluted white glue and water (one part glue / three parts water) and let dry