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Drilling Fluid Loss Control Agent Spnh Lignite Resin. Salt Water Compatibility: Effective in salt water, including saturated salt water environments. Custom Packaging: Special packages available based on customer requirements. ISO 9001 Certified: Product holds ISO 9001: 2015 certificate for quality assurance. Long Shelf Life: Shelf life is 2 years when stored properly. Free Samples: Free samples provided, though freight cost is not covered. Manufacturer Direct: Direct factory supply with 34 employees and 3 R&D engineers.