DOWICIL™ QK-20

DOWICIL™ QK-20 by LANXESS is a fast-acting, formaldehyde-free biocide that is ideal for reducing microbiological contamination in raw materials or products such as adhesives and caulks. It provides broad-spectrum control of bacteria, fungi, and yeast. It can be used effectively in combination with long-term preservatives to reduce the bio-burden and minimize the likelihood of organism tolerance. DOWICIL™ QK-20 lowers the chances for field failure, product recall, product rework, or downtime. It offers good compatibility and prevents contamination problems without shutting down or delaying production and without undesirable effects on your finished product. It exhibits a half-life of about 9 hours.

Overview

DOWICIL™ QK-20 is a fast-acting industrial biocide developed by Dow for controlling bacteria, fungi, and algae in various industrial and institutional applications. It is based on quaternary ammonium compounds (quats) and is widely recognized for its rapid antimicrobial activity and compatibility with multiple formulations. This product is especially suitable for use in paints, adhesives, sealants, coatings, and water treatment systems. Its excellent solubility, chemical stability, and low dosage requirement make DOWICIL™ QK-20 a cost-effective solution for industries seeking immediate microbial control and long-term preservation.

Benefits

  • Rapid Action: Fast-acting antimicrobial effect for immediate protection.

  • Broad-Spectrum Efficacy: Effective against bacteria, fungi, and algae.

  • Low Dosage Efficiency: Delivers strong performance at low concentrations.

  • Excellent Compatibility: Works with a wide range of water-based and polymer systems.

  • Regulatory Compliance: Meets global safety standards for industrial preservatives.

Applications

  • Paints & Coatings – Provides quick microbial protection in water-based formulations.

  • Adhesives & Sealants – Prevents microbial degradation that can compromise bonding.

  • Construction Chemicals – Used in admixtures, grouts, and cement-based systems.

  • Industrial Water Systems – Controls bacteria, fungi, and algae in storage tanks and process systems.

  • Cleaning & Hygiene Products – Effective as a preservative in industrial cleaners and disinfectants.

Properties Table

PropertyDetails
Product NameDOWICIL™ QK-20
ManufacturerDow
Chemical TypeQuaternary ammonium compound-based biocide
Active IngredientsAlkyl dimethyl benzyl ammonium chloride
Physical FormLiquid
AppearanceClear to pale yellow liquid
pH Range6.0 – 8.5
SolubilityCompletely soluble in water
Specific Gravity0.97 – 1.01
Shelf Life12 months in original sealed container
ApplicationsPaints, Coatings, Adhesives, Water Treatment
Storage ConditionsStore in a cool, dry place; avoid freezing
Packaging50 kg / 200 kg HDPE drums

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