The AAC Seastar Sealoon is a Canadian amateur-built flying boat, under development by Amphibian Airplanes of Canada.

The aircraft is intended to be supplied as a kit for amateur construction.

[1] The Sealoon is derived from the earlier biplane AAC SeaStar and features a cantilever mid-wing, two seats in side-by-side configuration in an enclosed cockpit that is 44 in (112 cm) wide, retractable tricycle landing gear and a single pod-mounted engine in pusher configuration.

The aircraft's recommended engine power range is 80 to 120 hp (60 to 89 kW) and standard engines used include the 100 hp (75 kW) Rotax 912ULS four-stroke powerplant.

[1] The company CEO, Hans Schaer, indicated in June 2010 that development of the Sealoon was being delayed by the ongoing Great Recession.