Category overview
Biocides are available as liquid dispersions or fine powders that function by inhibiting the growth of bacteria, fungi, and algae, preserving the integrity of coatings. Their key benefits include long-lasting protection, improved aesthetic durability, and reduced maintenance. Thus, they are indispensable in architectural, marine, wood, and industrial coatings exposed to biological fouling.
The coatings industry is shifting toward non-leaching, encapsulated, and polymer-embedded biocide technologies. Regulations such as the EU Biocidal Products Regulation (BPR) and EPA FIFRA impose stringent guidelines on permissible active ingredients, leading to the development of encapsulated and non-leaching biocide technologies. Alternatives include silver-based and polymer-embedded antimicrobial solutions. Subtypes include dry-film preservatives and in-can preservatives.
Applications
Claims / benefits
Properties
Recently launched products
parmetol® BPX
by Vink Chemicals
- Recently launched
Most popular products
Parmetol® DF 35 N
by DKSH
- Sustainable option
- Support available
- Original documents
KATHON™ LX 1.5%
by DKSH
- Support available
- Original documents
ROZONE™ 2000
by DKSH
- Support available
- Original documents
Popular suppliers
FAQs
In-can preservatives vs. dry-film biocides: what's the difference?
In-can preservatives protect the coating while liquid in the container, preventing spoilage during storage. Dry-film biocides stay active in the cured film, protecting against surface mold, algae, or fungal growth over its service life.
How do I choose the right biocide for my formulation?
Consider the spectrum of protection needed (bacteria, fungi, algae), compatibility with your pH and other ingredients, required dosage, and regulatory approval status. Combining in-can and dry-film biocides is common.
What are signs a coating's in-can preservation has failed?
Off odors, gas formation or can bulging, viscosity changes, discoloration, or visible mold. Any of these suggest microbial contamination, and the affected batch should generally not be used.
Does adding more biocide always give better protection?
No. Beyond the effective dose, more biocide doesn't meaningfully improve protection and can raise cost, labeling requirements, or compatibility issues. Using the minimum effective dose for the needed spectrum is recommended.