Isooctyltriethoxysilane | Manta LO320

Manta LO320 is isooctyltriethoxysilane (CAS 35435-21-3, 98.0% min purity by GC), a monomeric alkyl silane used as a penetrating water repellent for concrete, masonry and stone and as a surface modifier for mineral fillers. It releases ethanol rather than toxic methanol on hydrolysis and is comparable to Wacker SILRES BS 1701.

Manta LO320 is isooctyltriethoxysilane. It is a monomeric, medium-chain alkyl functional silane that serves as a highly effective penetrating water repellent for premium concrete and cementitious substrates.

Distinguished by its ethoxy reactive groups, Manta LO320 offers a profound environmental and safety advantage. Upon reaction with atmospheric moisture or water within the substrate, it hydrolyzes and liberates ethanol rather than toxic methanol. This low-toxicity profile makes it the premier choice for environmentally sensitive projects, indoor applications, and green-building compliance.

Because of its highly branched eight-carbon structure (isooctyl group), this silane exhibits extremely low volatility and outstanding steric hindrance against alkali attack. The small molecular size allows Manta LO320 to penetrate deeply into the capillary pores. It chemically bonds with the substrate to form a durable, three-dimensional hydrophobic network, effectively repelling water and waterborne chloride ions while 100% retaining the original appearance and breathability (water vapor permeability).

Equivalent Grade: Wacker SILRES BS 1701.

1. Eco-Friendly Architectural Water Repellent & Protective Agent

Forms a deeply penetrating, durable hydrophobic barrier on concrete, masonry, and stone. Due to its ethanol-releasing nature, it is highly recommended for indoor infrastructure (e.g., parking garages, basements) and green buildings. It effectively prevents water ingress, freeze-thaw damage, and chloride-induced rebar corrosion, significantly extending the service life of the structure.

2. Surface Modifier for Inorganic Fillers

Acts as a highly efficient surface treatment for mineral fillers (such as ATH, silica, and calcium carbonate). The highly branched isooctyl group dramatically lowers surface energy, improving the dispersibility and compatibility of fillers in non-polar plastics, rubbers, and resin matrices.

3. Pigment Dispersant & Coating Additive

Enhances the rapid wetting and uniform dispersion of treated pigments (e.g., TiO2) in industrial coatings and masterbatches, reducing viscosity and preventing agglomeration.