A sealed t-joint includes a first component having a first sealing surface, a second component having a second sealing surface, and a third component including a channel characterized by a channel height, channel width, and a channel depth. The t-joint also includes a gasket having a thickness and a protrusion characterized by a protrusion height, a protrusion width, and a protrusion depth. The protrusion height is less than the channel height, the protrusion width is less than channel width, and the protrusion depth is less than the channel depth. The t-joint additionally includes a polymer sealant. The gasket is compressed between the first and second sealing surfaces to generate a first and second component sub-assembly. Additionally, the polymer sealant is applied into the channel. The third component is subsequently assembled with the first and second component sub-assembly such that the protrusion extends into the channel to seal the t-joint.