EXTREME DURABILITY & ADHESION ON ANY SUBSTRATE: EXTERIOR ROCK SOLID REPAIR FILLER is extremely durable and will adhere to any substrate for filling and repairs with no depth limit. It sets to a rock hard finish and can be overcoated in 24 hours. Overcoat with any standard water-based masonry paint or mineral paint. If using polyurethane or epoxy solvent-based paints, first prime with a water-based exterior paint. Fills and repairs all substrates Extremely Durable Rich in resin No need to seal the substrate * Shapeable - repair without formwork