Elastermeric Acrylics bridge the gap (less than 1/16th of an inch or 1.5mm) on cementitious surfaces because they can elongate 400 to 1000 times. Proper preparation is required. The surface should be scrapped out in a “V” shape for a sound edge and to “key” into the opening. Of course, remove all debris and dust from the surface. Multiple coats are needed for the product to stay pliable and flexible in all weather conditions. On average, each coat is about 8 to 12 mils wet with a minimum of 2 to 3 coats to achieve a solid result.