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. Suitable for new or renovated substrates, either unpainted or painted: gypsum plaster, old painted surfaces, cement, concrete, breeze blocks, bricks, stones, glass and glazed tiles. 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. For External Use Extremely Durable Rich in Resin Fills & Repairs All Substrates Shapeable to Repair Without Formwork Ready to Paint 24Hrs after Application For External Use Extremely Durable Rich in Resin Fills & Repairs All Substrates Shapeable to Repair Without Formwork Ready to Paint 24Hrs after Application