Bostik A330 FILL A GAP FLEX is a high quality sealant based on acrylic dispersion. After application, the product cures to a solid plasto elastic rubber by evaporation of water from the sealant.
Joint with the correct dimensions is able to absorb movements between building materials. The joint depth should always be in the correct relationship of the joint width. A general rule is the ratio of joint depth to the width of the joint with a joint width up to 10 mm is 1:1, with a minimum of 5 mm in width and depth. For joints wider than 10 mm, the depth is the width divided by 3 plus 6 mm.