Deep Gap Filler is a revolutionary new filler, formulated using ceramic spheres that fill most holes and cracks; especially deep holes up to 50mm, in just one quick application with no need for secondary filling to level off. Deep Gap Filler will not shrink, sag or crack and dries to a light grey finish. Deep Gap Filler finishes smooth, requiring little or no sanding and can be ready to paint or wallpaper in just 30 minutes. It can be used for repairs to wood, plaster, masonry, cement, stone, brick and rendering.