Water Proofing Division

Telford is proudly representing award winning product in 2007 - SIL-ACT™ USA, as the sole-distributor and applicator for a multiple choice of products in water-proofing. This is a non-conventional type of water repellents solutions in protecting structural, infrastructure, buildings and all kind of concrete and non-concrete works.

For over thirty years, Advanced Chemical Technologies (ACT), Inc. has been a leader in developing the highest quality silane waterproofing treatments in the United States. Our ATS-42 was the first silane product in the world used to protect bridge structures. This is worth to note that it was also the first silane product used to protect a nuclear power plant.

Nationally and internationally, ACT products are approved and used by Departments of Transportation, USA to protect their highway infrastructures. We have the expertise to provide the best products in the market.

Advanced Chemical Technologies, Inc. is committed to research and development. Being part of the ACT global business partner, we bring to the market the highest quality silane weatherproofing solutions. Our products protect concrete, brick, masonry, and natural stone structures around the world.

Concrete protected with SIL- ACT™ products
  Benefits of using SIL-ACT™ water repellents product in construction applications. All construction materials are exposed to damaging environments ranging from water ingression, to abrasion by airborne particles and attack by organisms, to accidental spills. Dow Corning produces a range of products for use in formulations applied to a variety of substrates:
  • Structural concrete
  • Pavers and flagstones
  • Sandstone
  • Limestone and marble
  • Brick and tile
  • Wood

Brick protected with SIL- ACT™ products
  The formulations are used as preventive or remedial treatments for structural concrete, building facade and OEM substrates and provide a variety of features and benefits:
  • Improved long-term protection
  • Reduced maintenance time and costs
  • Reduced efflorescence
  • Reduced spalling (freeze-thaw damage)
  • Improved strength of fragile masonry
  • Reduced staining and easier cleaning
  • Improved dimensional stability of wood
  • Reduced chlorine ion ingression and corrosion

Wood protected with SIL- ACT™ products
  Silicone-based technology ensures:
  • Repellency to water and water-soluble agents
  • Permeability to water vapor
  • Durability: chemically bonded with the substrate
  • Deep penetration with silanes
  • Low surface tension
  • UV stability
Chesapeake Bay Bridge
Chesapeake Bay, Virginia
Eighteen miles of structure protected by
  Tinker Air Force Base, Runway
Oklahoma City, OK
SIL-ACT™ water repellents are penetrating isobutyltrimethoxy silane treatments that permanently weatherproof concrete and masonry from water and salt intrusion without forming a surface coating. SIL-ACT™ provides:
  • Permanent chemical bond
  • Deep penetration/forms a penetrated protection layer
  • No appearance or surface change - does not yellow
  • Does not affect skid resistance
  • Easy to use, reduces masking, overspray and cleanup problems
  • Vapor permeable
  • Stops water, salt and waterborne contaminant intrusion
  • Stops efflorescence, freeze thaw damage and spalling
  • Resists acid rain damage and waterborne staining
  • Cost effective
  • Improves adhesion of solvent based paint/striping
  • Not susceptible to ultraviolet or chemical degradation
  • Effective on brick and many types of natural stone
SIL-ACT™ water repellents are penetrating isobutyltrimethoxy silane treatments that permanently weatherproof concrete and masonry from water and salt intrusion without forming a surface coating. SIL-ACT™ provides:
1. Silanes
Silanes are the smallest silicone molecules, which ensures deep penetration into substrates. Silane treatments are well established examples for nanotechnology. They react with themselves and any hydroxyl (OH) groups within the substrate when moisture is present, forming a silicone resin network. This formation of strong chemical bonds provides the durability characteristic of silicone treatments. See figure 1 and 2.
2. Siloxanes
Individual water vapor molecules can pass through, while water droplets are repelled by the hydrophobic chemical groups that remain on the outside, resulting in water beading. The low surface tension of siloxanes enables them to spread easily, forming a molecular layer that penetrates into the substrate.

Various groups can be substituted onto the polymers, enabling chemical reactivity with the substrate and other siloxane molecules.

Silicone-based products penetrate deeply, forming a repellent layer within the substrate. Where RO is an alkoxy group, typically methoxy or ethoxy, with the capability to react with hydroxy (OH) groups on the substrate. X is an organic group, such as methyl, butyl or octyl, and provides hydrophobicity.
Most siloxanes, especially silanes, are very small molecules, and when applied to the surface of a suitable substrate, penetrate deeply. They react with the substrate and themselves to provide durability. When cured, they allow water vapour transmission while preventing liquid water, which could contain dissolved chloride ions or acids, to pass into the substrate
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