Woodland Scenics: C1205 WDS1205 Woodland Scenics Flex Paste Modeling Paste 16fl oz ALL GAUGES This flexible, non cracking paste can be used to create a hard surfac, as a filler or primer on styrofoam. Also as a road base or sealer under water. Excellent for modeling heavy snow drifts w/ Sprinkle Soft Flake Snow in top of it