This 500ml water resistant fast curing gap filling expanding foam from Soudal has been specially designed for quick and easy filling of gaps joints holes and pipe penetrations around the interior and exterior of your home. Simply apply and leave for 1½ hours for a bead of 3cm to dry. It comes in an easily storable and transportable aerosol and expands to approximately 30 times the size of the can. If you're using it during redecoration projects it's sandable and paintable making it perfect for giving a smooth professional finish once dried.