DuraSeal Trowelable Wood Filler is a safe, non-flammable, water based product that can be used across an entire wood floor. This product fills nail holes and covers other minor imperfections in bare and unfinished wood. DuraSeal Trowelable Wood Filler has a fast dry time, blends and adheres well to wood. DuraSeal Trowelable Wood Filler is sanded with ease. This product also easily absorbs stain.