https://en.m.wikipedia.org/wiki/Linseed_oil aka flax seed oil
The company also touts the clay floors as a more sustainable alternative to concrete, which besides being more expensive generates major carbon emissions in production. The cement industry is one of Uganda’s biggest contributors to carbon emissions, accounting for about 628,000 metric tons of carbon dioxide in 2023, its highest recorded level. More broadly, building and construction accounts for 37% of global emissions, according to the United Nations Environment Programme.