Extremely light-weight body filler. Excellent filling properties The easiest sanding of all the U-POL body fillers. High adhesion to a wide range of substrates: Steel, Aluminium, GRP and Wood. 2K very easy sanding polyester body filler ideal for larger repairs. Pinhole free and exceptionally easy to sand even the next day. Available in a large tin or the economical job kit of 10 filler bags.