Durafill is a highly waterproof, flexible cement based crack-filler compound that withstands harsh weather conditions - withstands rain & heavy coastal humidity. Durafill dries to a permanent, flexible finish when cured. An interior & exterior crack filler that’s suitable for application onto painted & unpainted cement, concrete, gypsum plastered walls and surfaces. Also sticks to timber and fibre cement surfaces. Durafill provides an exceptionally hard-wearing and high quality finish that quickly & easily fills joints, small cracks, blemishes, holes & other defects. Has excellent adhesion capabilities & provides a chalk free, non-cracking, nonflaking & peel resistant flexible finish. Durafill contains cement; marble dust & mica; silica; aggregates; resins & binders.