anti Algae paint

[migrant]

I have seen some in the US, and a worker at watsadu pointed out a paint that he said algae would not grow on but the paint can didn't say anything about it.

Anyone know of a good brand to paint on concrete close to the ground that algae will not grow on?

Thanks!

[Bluesky]

This may be worth a look


https://www.compacpaint.com/product/detail/?id=8400

COMPACSMARTSHIELD100% PREMIUMACRYLIC SEMI-GlLOSS FOR EXTERIOR & INTERIOR

Based on 100% premium acrylic and light-fasted pigments with special adhesion additive, Compac SmartShield is the most durable exterior wall finish which is semi-gloss film texture and offers many outstanding qualities such as washability, alkali resistance, fungus and algae resistance and withstand the UV degradation in the tropical climate. With the quality you can rely on, Compac SmartShield is certifed by Thailand IndustrialStandard (TIS)--Weather Resistant Emulsion Paint. For safety, it contains no added lead and no added mercury.

UV Resistance
Excellent Adhesion
Washable & Easy Clean
Anti dirt & stain
Anti - Water Repellent
Anti - fungus & algae
No added lead and No added mercury
Grade : Premium
Film type color : Semi-gloss
Product size : 5 Gallons,2.5 Gallons,1 Ga

Phone number Thailand +66 (2)-806-6881-5
Another option:
https://www.thaikiwa.com/upfile/KHRAM%2 ... tation.pdf

[pharvey]

Worth having a look at additives to a "standard paint" if a specialist paint is unavailable - when living in China, we had the same issue and used Zinc Sulphate as an additive which was readily available and seemed to work well. The following was taken from wiki: -

"Any one of these gives paint significant mould resistance:

Aspirin
Copper compounds
Alum
Zinc sulphate
Borax
Combine more than one additive for maximum mould resistance.

With alkyd or oil based paints all additives need to be very finely powdered.
Water based paints dissolve the above additives, making this less important.
Lumpy soluble additives such as soluble aspirin should be added, time given to dissolve, then the paint mixed thoroughly.
When using aspirin, the salicylate reacts with water to form salicylic acid. 16 aspirin tablets per 2.5 litres of paint is suitable.

Some copper compounds are toxic if ingested in more than miniscule amounts, so wash hands afterwards. Too much copper can cause noticeable paint discolouration.

For outdoor paint, ferrous sulphate can be used to prevent algae.

Water soluble additives can leach out of the paint in time. Nonetheless the author's first use of this method (in a bathroom with aspirin) remained effective over a decade later. Don't wipe down wet walls, let them dry and the additive is not lost. A insoluble additive such as copper powder is likely to last better outdoors."

[migrant]

Thanks!!