BY-O-COAT RC 450 is a bio-based hydrophilic silica sustainably synthesized from rice husk, designed as a multifunctional additive for paints and coatings. With a medium BET surface area (350–500 m²/g) and controlled particle size distribution, it provides excellent rheology control, chemical resistance, and durability across a wide range of coating formulations. Its amorphous, micron-sized powder structure allows easy incorporation while enhancing performance through porosity and stability. Resistant to extreme environments (from -55°C to 450°C), RC 450 is a reliable solution for high-performance, sustainable coatings that demand long-term protection and consistency.

BY-O-COAT RC 600 is a high BET bio-based hydrophilic silica, sustainably synthesized from rice husk, designed as an advanced additive for paints and coatings. With a high surface area (500–700 m²/g) and optimized particle size (3–10 µm), RC 600 offers exceptional thermal insulation, rheology control, and chemical stability. Its porous structure and reflective properties make it highly effective in thermal-barrier coatings, both intumescent and non-intumescent. Resistant to extreme environments (-55°C to 450°C), it prevents deformation and corrosion, extending coating durability and performance.

BY-O-COAT HO 300ST is a pre-dispersed bio-based hydrophobic silica, sustainably synthesized from rice husk and engineered to impart water repellency and moisture barrier properties in paints, coatings, and composites. Designed for easy dispersibility, it simplifies processing compared to conventional inorganic pigments and extenders, reducing production time and costs. HO 300ST also provides rheology control, free-flowing behavior, and lubrication in powder additives and powder coatings. It is a highly cost-effective, eco-friendly, and non-toxic alternative for hydrophobic performance across multiple applications, including plastics and mineral composites.

BY-O-COAT OC 3KW is a bio-based oleophobic colloidal silica, sustainably synthesized from rice husk and specially designed as a multifunctional additive for waterborne coatings. It provides strong oil, hydrocarbon, and water repellency, while improving hydrophobic and oleophobic performance of aqueous formulations. With high surface activity, OC 3KW accumulates on the surface of coatings and chemically integrates into the polymer network via -OH reactivity, ensuring long-lasting effects. It also improves substrate wetting, water resistance, blush resistance, anti-blocking, and weather resistance, making it ideal for high-performance aqueous topcoats such as polyurethanes, melamine systems, and epoxy-acrylate blends.

BY-O-COAT OC 3KS is a bio-based oleophobic colloidal silica, sustainably derived from rice husk and developed as a premium additive for solvent-borne coatings. It provides outstanding oil, hydrocarbon, and water repellency, improving surface durability and cleanability. With its high surface activity, OC 3KS migrates to the surface of coatings and integrates into the polymer network through -OH reactivity, ensuring long-lasting effects. It enhances substrate wetting, blush resistance, anti-blocking properties, and weather durability, making it an ideal solution for high-performance solvent-borne topcoats such as polyurethanes, melamine systems, and epoxy-acrylate combinations.

BY-O-COAT CO 4KS is a bio-based colloidal silica, sustainably produced from rice husk and developed as a multifunctional additive for solvent-based coatings. Thanks to its colloidal structure and high dispersibility, CO 4KS enhances hardness, scratch resistance, durability, and barrier properties, while also improving pigment stabilization and substrate adhesion. It forms denser, less porous films, reducing the penetration of water and chemicals and significantly extending the coating’s service life. Its excellent compatibility with solvent-based formulations makes it ideal for high-performance industrial, automotive, and protective coatings.

BY-O-COAT AC 99 is a bio-based silica infused with copper nanoparticles, sustainably synthesized from rice husk. It provides exceptional antimicrobial, antiviral, and anti-odor properties, achieving up to 99.99% antimicrobial efficiency (tested according to JIS Z 2801 against E. coli, Staphylococcus aureus, and both gram-positive and gram-negative bacteria). With long-term activity, resistance to copper oxidation, and eco-friendly composition, AC 99 is ideal for coatings, plastics, textiles, and packaging that demand built-in hygiene and durability.

BY-O-COAT AC 99X5 is an advanced bio-based silica infused with copper nanoparticles, sustainably synthesized from rice husk. It delivers powerful antimicrobial, antifouling, antiviral, and anti-odor properties, achieving up to 99.99% antimicrobial efficiency (tested according to JIS Z2801 against gram-positive and gram-negative bacteria, including E. coli and Staphylococcus aureus). With long-lasting activity, resistance to copper oxidation, and effectiveness at lower dosages, AC 99X5 is ideal for coatings, plastics, textiles, and packaging that demand built-in hygiene and durability.

BY-O-COAT HO 300PD is a bio-based hydrophobic silica, sustainably synthesized from rice husk and surface-treated with PDMS (Polydimethylsiloxane). It is widely used as a multifunctional additive for paints and coatings, offering water repellency, scratch resistance, and enhanced durability. With a medium particle size (4–8 µm) and controlled porosity, HO 300PD improves rheology, anti-settling, and anti-sagging properties, while also enabling low-gloss or satin finishes. Its hydrophobic nature reduces dirt adhesion, making it ideal for marine, outdoor, and architectural coatings, while providing strong chemical and UV resistance for long-lasting protection.

BY-O-COAT TI 650 is a next-generation bio-based hydrophilic silica, sustainably derived from rice husk and engineered for high-performance thermal insulation coatings. With a high BET surface area (500–650 m²/g) and ultra-fine particle structure, TI 650 provides exceptionally low thermal conductivity, reducing heat transfer and improving energy efficiency. Its excellent dispersibility and compatibility with waterborne coating systems ensure stable formulations without agglomeration, while its chemical stability guarantees long-term durability and environmental resistance. As a bio-based and biodegradable additive, TI 650 supports the development of safer, eco-friendly coatings for industrial and architectural applications.

BY-O-COAT RC 300A is a bio-based hydrophilic silica, sustainably synthesized from rice husk and designed as a rheology control additive for paints and coatings. With a low BET surface area (150–350 m²/g) and optimized particle size (4–8 µm), RC 300A works effectively as an anti-settling, anti-sagging, and thickening agent, ensuring stable formulations. It improves pigment stabilization, flow, and leveling, while reducing cracking in highly filled systems. Resistant to extreme environments (-55°C to 450°C) and chemicals, RC 300A provides long-lasting durability and shelf stability, supporting sustainable, eco-friendly coating formulations.

BY-O-COAT CI 5PW is a bio-based colloidal nano silica, sustainably synthesized from rice husk and designed as a high-performance additive for paints and coatings. With its ultra-fine particle size (≤100 nm) and aqueous dispersion form, CI 5PW easily integrates into waterborne formulations, simplifying processing. It enhances hardness, scratch and abrasion resistance, adhesion, and barrier properties, creating a denser, less porous paint film. By reinforcing the polymer matrix, it significantly improves durability, chemical resistance, and water resistance, resulting in longer-lasting and more resilient coatings.