Sandtex masonry filler 500gthis water resistant filler from sandtex comes ready to use and is perfect for filling and repairing cracks and holes on external surfaces of your home simply apply with a spreader to brick render stone and most other building materials except common fletton brick and leave for 1 hour to dry its non shrinking or cracking to ensure it has a longer life it can be painted over once its dried ideal for colour matching with your existing decor