Water Repellent Selection Guide

Choosing a water repellent starts with the substrate and with how the product reaches it: applied to a hardened surface, mixed into the material, or built into a coating.

Hardened concrete and masonry

• For infrastructure and dense concrete, use a neat alkyl silane such as Manta LO320, or a silane paste such as Manta LO320E or Manta WS120 on vertical and overhead surfaces.
• For water-based site application, use a penetrating emulsion such as Manta WS101.
• For stone and masonry impregnation, consider a concentrated grade such as Manta WS114.

Integral water repellency

• For gypsum powders, lightweight aggregates and dry-mix mortars, use a powder such as Manta WR-P01 or Manta WR-P02.
• For concrete and cement mortars, use an admixture such as Manta WS170.
• For factory production of bricks and tiles, use a siliconate such as Manta MSES.

Paints and plasters

• Manta WS450 and Manta WS600 are hydrophobic binders for silicone resin paints and plasters.
• Manta WS136 is a water-repellent additive for waterborne coatings.

Oil repellency

Where oil and stain repellency is required as well as water repellency, fluoroalkyl silanes such as Manta F1332 are an option, subject to the PFAS rules in your market.

Whichever form you choose, confirm dosage, dilution and compatibility on the TDS and run a trial on the actual substrate before full application.