#1-selling polymer powder for nail repairs and strengthening Repair nail quick and easily. Strengthens natural nails. Instantly "fill in", strengthens and protects the "seam or ridge area" of nail tips. None yellowing. #1in performance. #1 in quality. Together, 5 Seconds Nail Filler. and 5 Second Nail Glue create an ultra-strong polymer coating that professionals count on to strengthen and protect nails. In a convenient bottle with shaker top. Size: 4gm bottle.