Bostik Cementone Render Repair Mortar is a durable solution for patching and repairing weather or impact damage on both interior and exterior surfaces. With a 10kg bag, this high-quality mortar ensures long-lasting results. Perfect for professionals and DIY enthusiasts alike. Bostik Cementone Render Repair Mortar - ideal for repairing weather and impact damage both inside and out. Developed to provide durable repairs and patching to most building substrates including bricks, blocks, and concrete. Easy to use, simply mix in the bucket and apply with a trowel or float. Can be overpainted when fully cured. Contents: 2 X 5kg.