Thermoset™ is a lost circulation additive designed for use in oil-based and water-based fluids as well as cement slurries. Thermoset is a deformable rubber-based product that is totally inert. This fluid loss additive is environmentally stable and has excellent particle size distribution, particle strength and deformation characteristics. Thermoset is easily made wet with common agents. The Thermoset fluid loss additive is available in both Fine (F) and Medium (M) grade particles.