2-Octyl-2H-isothiazol-3-one (OIT) is a highly effective dry-film preservative that delivers long-term protection against fungi, algae, and mold on coated surfaces. With its low water solubility and strong hydrophobic profile, OIT binds efficiently to film surfaces and resists leaching, even in outdoor or high-moisture environments. It is commonly used in architectural coatings, sealants, marine paints, plastics, leather goods, and wood treatments, offering broad-spectrum antimicrobial action and excellent weathering resistance.
Long-Lasting Dry-Film Protection – Strong resistance to weathering and UV exposure
Hydrophobic and Low Leaching – Stays bound to treated surfaces for durable efficacy
Broad-Spectrum Antimicrobial Activity – Effective against fungi, algae, and mold
Excellent Thermal Stability – Performs in high-heat and high-humidity applications
Wide Compatibility – Compatible with water-based and solvent-based systems
Suitable for Outdoor Use – Ideal for products exposed to harsh environmental conditions
Paints & Coatings – Prevents surface mildew and fungal growth in interior and exterior formulations
Sealants & Caulks – Ensures microbial protection in silicone and acrylic sealants
Leather Preservation – Inhibits fungal growth in tanned leather and leather articles
Plastic & PVC Products – Controls microbial degradation in flexible polymers
Wood Protection – Used in wood stains and preservatives to prevent mold/algae
Construction Chemicals – Effective in coatings for masonry, concrete, and roofing
| Property | Details |
|---|---|
| Product Name | OIT (2-Octyl-2H-isothiazol-3-one) |
| Chemical Type | Isothiazolinone-based dry-film preservative |
| Active Ingredient | 2-Octyl-2H-isothiazol-3-one (OIT) |
| Typical Active Content | 45.0% (available in other concentrations as well) |
| Physical Form | Liquid |
| Appearance | Pale yellow to amber liquid |
| Odor | Mild characteristic odor |
| pH (as supplied) | ~5.0 – 7.0 |
| Solubility | Limited solubility in water; soluble in solvents |
| Density @ 20 °C | ~0.98 – 1.02 g/cm³ |
| Flash Point | >100 °C |
| Recommended Use Level | 0.05% – 0.3% depending on application |
| pH Stability Range | 4 – 10 |
| Shelf Life | 24 months (in original sealed container) |
| Packaging Options | 25 kg pails, 200 kg drums, 1000 kg IBC totes |
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