PureBase Corporation, an industrial mineral and natural resource company, engages in the provision of solutions to the agriculture and construction materials markets in the United States. The company offers PureBase Shade Advantage WP, a natural mineral plant protectant that reduces sunburn damage to plant tissue exposed to UV and infrared radiation; humic acid product derived from leonardite, which can be an important medium for soil health, water retention, and positive interactions with the soil microbiome; and other specialized fertilizers, sun protectants, soil amendments, and bio-stimulants for organic and non-organic sustainable agriculture. It is also involved in the development and testing of kaolin-based product, that can help in creating lower CO2-emitting concrete using supplementary cementitious materials (SCM) for cement markets. The company was formerly known as Port of Call Online, Inc. and changed its name to Purebase Corporation in January 2015. Purebase Corporation was incorporated in 2010 is headquartered in Sutter Creek, California.