Bostik Sealant All Weather White is a repair mastic for sealing small joints and cracks between stone, concrete and metal. It's suitable for sealing leaks in gutters and can be used as a steel construction mastic for sealing joint constructions in aluminium. This product can also be used as a roofing sealant to bond and seal as an emergency repair. It can be used in rain or puddles and seals leaks immediately. It's suitable for use on many materials such as lead, glass, wood, metals and stone. The sealant can be painted over after 24 hours. For external use only. The product comes in a 300ml size and is available in white colour.