ave time, extend your exterior painting season and solve your fresh mortar problems with Loxon Block Surfacer. This sealant can be applied to fresh mortar after just 7 days, allowing you to turn jobs around fast and deliver a finished project quickly. Loxon weighs 1/3 less than other block filler products and backrolls faster with less effort and has excellent pore filling characteristics. Loxon Block Surfacer reduces topcoat usage, and helps prevent alkali burn, delamination and water damage. Minimize project delays and paint failures, and enjoy labor savings with Loxon Block Surfacer.