Selleys No More Gaps Multi-purpose is a general-purpose interior/ exterior flexible gap filler. Its water based formulation delivers superior flexibility & long term resistance to cracking & crumbling, giving you a lasting finish. This formulation makes it ideal for sealing or filling gaps and joints where expansion and contraction occurs such as between a skirting board and a wall, which can cause rigid fillers and other less flexible gap fillers to crack and fall out.