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Water Repellency and Protection

Water beading on mortar cube coated with 520 or 2-8295 sealant

Specialty Chemicals with a Proven Ability to Provide Water Repellency and Enhanced Protection to Common Construction Substrates

Improve Water Repellency and Protection of Common Construction Substrates

When used as a post-treatment, either in-factory or onsite, silane, siloxane and silicone resins from Dow Consumer Solutions have a proven history of providing water repellency and enhanced protection to common construction substrates.

We offer a range of waterproofing chemicals designed to meet your specific project, material or formulation and sustainability needs, including:

  • Pure chemicals, mixtures and emulsions 
  • Solvent-dilutable, water-based and low-VOC options 
  • Options for the post-treatment of both new and old concrete, concrete blocks and roof tiles, fiber-reinforced cement boards, damp-proof coursing, clay bricks, floor tiles, sandstone, granite, limestone, marble, gypsum and wood
  • Waterproofing products based on Dow Consumer Solutions' extensive silicon-based chemicals expertise and 50 years of construction industry experience

Combined with technical expertise and advice from Dow Consumer Solutions experts, the right silicon-based products can deliver ideal performance for your specific application.

Why Choose Post-Treatment Water Repellents from Dow Consumer Solutions?

These hydrophobing surface treatments:

  • Provide protection against water absorption and resulting damage such as rebar corrosion, efflorescence, freeze-thaw damage, mold and mildew
  • Offer durable protection against water absorption with minimal impact on substrate appearance
  • Extend the life of building substrates for years in the toughest environments
  • Are weather resistant and long lasting
  • Are easy to use, easy to handle and highly effective at low concentrations

FEATURED RESOURCE

Impact of Water Repellent on Energy Demand of Building

Hydrophobing treatment can reduce energy consumption in existing buildings.

Read technical information ►

How silane and siloxane post-treatment water repellents work:

  • When applied to the surface of your substrate, they penetrate deeply, reacting with the substrate to provide durable water repellency
  • When cured, they allow water vapor within the substrate to escape while preventing liquid water from entering
Treated and Non-treated substrate

By keeping substrates dry, these water repellents:

  • Reduce water absorption, lowering the absorption of salts such as chloride ions, a root cause of corrosion, and reduce the effect of efflorescence
  • Reduce thermal conductivity and increase the energy efficiency of the building

Construction Chemical Solutions from Dow
Help improve the durability of building products and enhance end-product capabilities.

A Little Goes Further With DOWSIL™ IE-6694 Water Repellent Emulsion
This low-VOC emulsion covers more surface area with less product.