Folkert de Jong is known for his lifesize sculpture groups made out of polystyrene and polyurethane foam, which is used as isolation material in fields like construction, architecture and Hollywood set design. Alongside contemporary political matters and current events, his work often evokes associations from art history, instilling a sense of a post-apocalyptic future.

The past five years, he has begun working in ceramic alongside synthetic materials. 

Between 2018 and 2022, he worked on a commission for the city of Hoorn, teaming up with his brother, architect Merijn de Jong, to design two social housing complexes with ceramic art integrated in the façade. The entrance decorations he designed and the architecture surrounding them bring ancient civilisations to mind. The patterns and symbolic ceramic indentations in the concrete are based on stories grounded in Hoorn history. While working on the project, he discovered the material and physical potential that ceramics and concrete could have in his process. 

For his participation in the 2023 h3h biennial, he is creating a new piece titled Pleurants, consisting of five human-sized figures of terracotta and cement.