All wall foams are not created equal! compare gladon’s high quality flat foam to any other’s and you can see and feel the difference. Other manufacturers call their 1.5 to 1.7 lb. Foam 2.0 lb. Not gladon! waveless wall foam is true density.true density means easier installation and superior protection for pool liners. For use on metal, concrete, or wood to give smooth pool walls and floors. All rolls are protected with a heavy gauge stretch wrap and do not have a core to discard. Do you need special lengths and widths? no problem! gladon does all of its own slitting and rewinding in house. If it’s not gladon, it’s not waveless