Woodland Scenics® - sub terrain system foam putty 16 oz / 473 ml.
This lightweight non shrinking filler putty dries with similar characteristics to foam. It's ready to use right from the tub and dries to a bright white colour. Perfect for filling cracks between foam sections or small gaps and holes along the layout. can be sculpted and carved while wet and sanded or carved when dry. Plastic jar for easy storage.