So how can you tidy up the look? So he color-matched the sand, applied the new mortar and troweled the joints, as with any mortar job. Is this the Holy Grail of mortar repair? Get more details, How much do you need? - Set Posts (Protect your skin and eyes, and wear old clothes that you dont mind spattering with bleach.) Another issue with the caulk is it produces a monochromatic color. brick, block, stone and concrete surfaces. It may take a decade or two, but the suns UV rays are so powerful they can break atomic bonds of metals. Quikrete Acrylic Mortar Repair Sealant 5.5 Oz., Gray, Quikrete Advanced Polymer Mortar Joint Sealant 10 Oz., Gray, Mor-Flexx Stucco & Mortar Sealant 10.5 Oz., Gray, Mor-Flexx Stucco & Mortar Sealant 10.5 Oz., Beige, Quikrete Textured Concrete Sealant 10 Oz., Gray, Quikrete Textured Concrete Sealant 5.5 Oz., Gray. --> The water would enter the brick and then go back outside as soon as the storm was over. All Rights Reserved. From that point on, the color of the sand affects the look of the mortar. - Application Instructor Hot, windy weather is the worst time to do any masonry or concrete work, as the water leaves the mortar and concrete too fast.