Natural Bentonite for Civil Engineering Applicationshigh Swelling Sodium Bentonite for Drilling Fluids. High Swelling Sodium Bentonite: Natural bentonite with high swelling properties for civil engineering and drilling fluids. ISO 9001:2015 Certified: International quality system certification ensures consistent product quality and reliability. OEM and ODM Services: Full customization, minor customization, and flexible customization options available from samples or designs. 100% Finished Product Inspection: Visual and function inspection conducted on all finished products with uniform instructions. Fast Delivery Time: Delivery within 7-15 days from Tianjin port, with peak and off-peak lead times under 15 workdays. Established Manufacturer: Factory founded in 1986 and company established in 2000 with over 10 years of export experience. Global Market Presence: Products exported to Japan, America, Thailand, Korea, and other countries across multiple continents. Comprehensive After-Sales Service: One-stop service including mining, production, processing, testing, sales, finance, and warehousing.