Perimeter seal

A sealing system, comprising:

• a first housing that defines a mating surface;
• a second housing that defines a seal gland having an inner wall, a base, and an outer wall, said second housing having a perimeter flange extending perpendicular to the outer wall of the seal gland and overlying a portion of the mating surface;
• and
• a seal that includes a continuous beam of compliant material compressed within the seal gland, said continuous beam characterized as having a generally H-shaped cross-section, said seal defines a captured end disposed within the seal gland and a free end extending beyond the second housing, said seal defines an inner flange, an outer flange, a web disposed therebetween, and a lip, said lip extends radially outward from and generally perpendicular to the free end of the outer flange and is disposed between the perimeter flange and the portion of the mating surface, wherein when the second housing is attached to the first housing the inner flange and the outer flange forcibly engages the mating surface of the first housing, the inner wall, the base, and the outer wall of the seal gland and the lip is compressed between the perimeter flange and the portion of the mating surface;
• wherein a cross-section of the lip is increased in thickness at a distal end of the lip relative to a midsection of the lip.