Self-sealing joint sealing system

An integrated self-sealing joint system, comprising:

• a first panel with an upper surface, a lower surface, and a first edge with a first length;
• a second panel with an upper surface, a lower surface, and a second edge with a second length;
• wherein the first panel and second panel are arranged in adjoining position to form a joint along the first edge and second edge;
• wherein the first edge comprises a first joint profile and the second edge comprises a second joint profile;
• wherein the first joint profile comprises a step, with a top of the step open to the upper surface of the first panel, with a step surface between the upper surface and lower surface of the first panel extending to an outer face of the first edge;
• wherein the second joint profile comprises a flat butt edge with a flat outer face extending along the second edge for the entirety of the second length and from the upper surface to the lower surface of the second panel;
• wherein the first joint profile comprises a factory-installed seam sealant affixed to the first joint profile and extending vertically from the step surface to a level at or below the upper surface of the first panel and extending laterally beyond the outer face of the first edge;
• wherein the factory-installed seam sealant is configured to be compressed and seal the joint formed when the second joint profile is moved towards the first joint profile, further wherein when the joint is formed, the factory-installed seam sealant expands vertically upward beyond the upper surface of the first panel and is compressed laterally to extend no further than the outer face of the first edge.