Higher Alkalinity

Higher Alkalinity

Painting on surfaces having higher alkalinity is very challenging, unless the pH level is reduced. The paints delaminate or strip off from the surface due to high alkalinity.

Measuring Alkalinity

• Alkalinity level can be checked using a simple pH paper.
• A value between 1 and 6 is termed acidic and a value between 8 and 14 is termed alkaline.

Alkalinity Range

Solutions

Between pH values 8 and 9 Use any Primer
Between pH values 10 and 11 Use water-based Primers only
Between pH values 12 and 14 • Wash the heavy alkaline surface with lime.
• Bring down the pH level to the recommended level.
• Paint the surface based on its nature and as per recommendations.

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