Selleys No More Gaps Exterior & Weatherboard is a specially formulated flexible gap filler, with superior weather, UV and mould resistance to protect against harsh external elements such as rain, wind and UV rays. It can be painted over with both water and oil based paints, so you can give your house the professional finish it deserves.| Superior flexibility to cope with building movement, meaning the cracks and gaps will be hidden for longer. Has greater than 500% elongation/stretch and up to +/- 25% joint movement capability.| Superior adhesion to a broad range of surfaces, resulting in a lasting finish.| Has good resistance to weathering.| Contains a titanium compound for superior UV resistance.| Contains a fungicide and algaecide to protect against unsightly mould and algae growth.| Can be painted over with both water and oil based paints, after the surface has skinned. (Approximately 30 minutes after application). Wide joints are best left for 48 hours before painting as some paints shrink during drying that can cause the paint to crack.| Is formulated for long term resistance to cracking and crumbling.| Is water based, so can be cleaned up with water.| Will not stain building materials.