Sealers' Oven is a man-made structure of mud and stone located on Waychinicup Inlet near Albany, Western Australia. Believed to be a semi-permanent bread oven built by sealers around 1800, it predates European colonisation of Western Australia by over twenty years, and is therefore one of the state's oldest non-Indigenous artifacts.
Built on a granite outcrop about four metres above the high tide line, it is a roughly circular kiln about one metre high and 1.5 metres across. At the top there is an access hole about 30 centimetres across, and there are two small ventilation holes at the base on the eastern side. It is built from granite stones, broad and flat at the bottom but somewhat larger and more circular at the top, suggesting that it may have been partially rebuilt.