Access portal including silicone foam three layer seal

An access portal comprising:

• a seal housing;
• a sleeve mountable to the seal housing, the sleeve having an internal longitudinal passage adapted to provide access to underlying tissue;
• and
• a seal disposed within the seal housing, the seal comprising:
• a first layer having an opening for reception and passage of a surgical instrument;
• a second continuous layer for providing a fluid tight seal in the seal housing in the presence of a surgical instrument;
• and
• a third layer having an opening for the passage of the surgical instrument therethrough,
• the first and third layers having a higher density than the second layer for maintaining the second layer in an axially compressed state between the first and third layers.