Foam Putty(TM) - SubTerrain System

This light-weight, nonshrinking filler putty dries with similar characteristics to foam. It's ready to use right from the jar and dries to a bright white color. 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 comes with an economical 16 ounces of putty.