1/2 gal (1.89 L) A specially formulated new Lightweight Hydrocal for terrain model builders. Lightweight Hydrocal is nearly half the weight of Hydrocal, goes almost twice as far, and is the tough, quick setting product. *Hydrocal is a product of U.S. Gypsum. Net wt....

Make rocks for places where rocks might pop out of the terrain, such as embankments, ditches and hillsides. Mold is flexible and reusable. Rocks range in size from smallest: 1 1/4" L x 3/4" W x 1/4 H to largest: 3 3/8" L x 1 3/4" W x...

Use this mold to make flat rocks for riverbeds, plateaus and road cuts. Mold is flexible and reusable. Rocks range in size from smallest: 1 1/2" L x 7/8" W x 3/16" H to largest: 3 3/8" L x 1 1/8" W x 1/4" H

Make big rocks used at quarry sites, mining operations, road cuts and more. Mold is flexible and reusable. Rocks range in size from smallest: 1/4" L x 3/8" W x 3/8" H to largest: 1 1/4" L x 3/4" W x 3/8" H

Make rocks for embankments, hillsides, road cuts and ditches. Mold is flexible and reusable. Rocks range in size from smallest: 3/4" L x 3/4" W x 5/8" H to largest: 3 3/4" L x 1" W x 3/4" H

Make rocks for anywhere on your layout. Mold is flexible and reusable. Rock measurements from top to bottom of mold: 4" L x 2 1/4" W x 7/8" H 3 1/2" L x 1 1/8" W x 5/8" H 4 3/8" L x 2...

Make rocks for road cuts, embankments, ditches and anywhere large rocks might surface. Mold is flexible and reusable. Rocks range in size from smallest: 1 1/4" L x 3/4" W x 1/4" H to largest: 5 3/8" L x 4 1/4" W x 5/8" H

Make rocks for riverbanks, road embankments or anywhere you want an outcropping of large rocks. Mold is flexible and reusable. Rocks range in size from smallest: 3/4" L x 5/8" W x 1/4" H to largest: 5 5/8" L x 2 5/8" W x 2 5/8" H

Make rocks for wind-eroded areas, such as deserts, sea shores, beaches and more. Mold is flexible and reusable. Rock measures 6 3/8" L x 4 1/8" W x 5/8" H

Make rocks where wind and water has battered the rock formations, such as water areas, deserts, canyons and more. Mold is flexible and reusable. Rocks range in size from smallest: 1 3/8" L x 1" W x 1/4" H to largest: 6 1/8" L x 4 3/8" W...

Make rocks anywhere earth and sediment have created layers of rock. Mold is flexible and reusable. Rocks range in size from smallest: 4 3/8" L x 1 1/8" W x 3/8" H to largest: 6 3/8" L x 3 3/8" W x 7/8" H

Make rocks where you want large rock masses. Mold is flexible and reusable. Rock measures 6" L x 4 3/8" W x 1 3/8" H

Make rocks anywhere the earth might have settled in layers, such as old sea beds, river bottoms and more. Mold is flexible and reusable. Rock measures 6 3/8" x 4 1/4" W x 1 1/8" H

Make rocks near water areas, especially oceans and seas or desert canyons. Mold is flexible and reusable. Rock measures 9 1/4" L x 4" W x 7/8" H

Make rocks for anywhere on your layout. Mold is flexible and reusable. Rock measurements from left to right, top to bottom of mold: 1 7/8 in L x 1 in W x 3/8 in H (4.76 cm L x 2.54 cm W x 0.953...

Make rocks anywhere you want rocks with deep cuts, such as embankments, canyon walls, ditches and more. Mold is flexible and reusable. Rock measures 9 5/8" L x 3 5/8" W x 1 1/2" H

Use these molds to cast the rocks to line the edges a creek, river, etc. Molds are flexible and reusable. Rocks range in size from smallest: 1 3/8" L x 3/8" W x 3/32" H to largest: 3 7/8" L x 1" W x 3/32" H NOTE: All Creek...

Use this mold to cast rocks to model dry creek beds or to set prior to pouring Realistic Water™ for creeks, rivers and streams. Mold is flexible and reusable. Rocks range in size from smallest: 7/8" L x 5/8" W x 3/32" H to largest: 3" L x...

Use this mold to cast and stack rocks to create a wall or form a jagged cliff face. Mold is flexible and reusable. Rocks range in size from smallest: 2" L x 3/4" W x 1/2" H to largest: 6 3/4" L x 1 5/8" W x 5/8"...

Use this mold to cast large rocks. Mold is flexible and reusable. Rock measures 7 1/2" L x 3 1/2" W x 3/8" H