MR.BUILD ACRYLIC CAULK is a acrylic base sealant for joints between construction parts subject to moderate stress. MR.BUILD ACRYLIC CAULK is ready for use & seals internal or external joints on porous surfaces such as concrete, plaster, asbestos, cementitious material, brickwork, cement, wood. It is not recommended for joints in continuous contact with water. Acrylic Caulk is a Low VOC, over-paintable product which meets green building requirements. Accommodates up to 20% joint movement.