Drywall repair kit can be used for repairing interior or exterior surfaces like drywall plaster wood brick and stoneColor indicator spackle goes on pink and dries white providing confirmation the product is dry within 1 to 5 hoursWall patch dries within 1 hour for repairs 1/8 in depth; for repairs deeper than 1/8 apply two or more layers and allow spackle to dry between applicationsDurable spackling will not crack crumble flake or shrink and creates professional looking wall repairs that lastNo priming required when used indoors kit contains: spackle 5x5 fiber tough patch 4x3 100 grit sandpaper and putty knife