Alkyl silanes are a class of non-functional or hydrophobic silane compounds that contain one or more alkyl groups (–R) bonded to silicon, together with hydrolyzable alkoxy groups. Unlike functional silanes (amino, epoxy, vinyl, etc.), alkyl silanes do not participate in polymerization or crosslinking reactions. Their primary role is surface modification and hydrophobic protection. They are widely used to impart water repellency, moisture resistance, and surface durability to inorganic substrates such as concrete, stone, glass, minerals, and metal oxides.
Siliconchemicals Alkyl Silanes are designed for hydrophobic surface modification and moisture protection of inorganic substrates. As non-reactive silanes, they focus on surface performance rather than polymer coupling, making them ideal for applications where water repellency, durability, and substrate protection are the primary objectives. By forming stable siloxane bonds with mineral surfaces and presenting outward-facing alkyl groups, alkyl silanes create a long-lasting hydrophobic barrier without significantly affecting vapor permeability or the appearance of the substrate.
| Product Code | Chemical Name | CAS No. | Molecular Formula | Structure Type | Alkyl Chain | Alkoxy Type | Product Form | Typical Content | Typical Applications |
|---|---|---|---|---|---|---|---|---|---|
| AS-N813 | n-Octyltrimethoxysilane | 3069-40-7 | C11H26O3Si | Alkyl-functional | C8 (linear) | Trimethoxy | Neat liquid | ≥97% | Concrete and masonry water repellents |
| AS-N823 | n-Octyltriethoxysilane | 2943-75-1 | C14H32O3Si | Alkyl-functional | C8 (linear) | Triethoxy | Neat liquid | ≥97% | Mineral surface hydrophobization |
| AS-N1013 | n-Decyltrimethoxysilane | 5575-48-4 | C13H30O3Si | Alkyl-functional | C10 (linear) | Trimethoxy | Neat liquid | ≥96% | Stone and concrete protection |
| AS-N1213 | n-Dodecyltrimethoxysilane | 3069-21-4 | C15H34O3Si | Alkyl-functional | C12 (linear) | Trimethoxy | Neat liquid | ≥96% | Construction waterproofing treatments |
| AS-N1223 | n-Dodecyltriethoxysilane | 18536-91-9 | C18H40O3Si | Alkyl-functional | C12 (linear) | Triethoxy | Neat liquid | ≥96% | Long-term surface hydrophobic protection |
| AS-N1613 | n-Hexadecyltrimethoxysilane | 16415-12-6 | C19H42O3Si | Alkyl-functional | C16 (linear) | Trimethoxy | Neat liquid | ≥95% | High-durability mineral surface treatment |
| AS-N1813 | n-Octadecyltrimethoxysilane | 3069-42-9 | C21H46O3Si | Alkyl-functional | C18 (linear) | Trimethoxy | Neat liquid | ≥95% | Premium water-repellent coatings |
| AS-I823 | i-Octyltriethoxysilane | 35435-21-3 | C14H32O3Si | Alkyl-functional | C8 (branched) | Triethoxy | Neat liquid | ≥97% | Fast-reacting surface treatments |
Product List
Alkyl silanes are a group of non-functional (non-reactive) silanes primarily used for hydrophobic surface modification and moisture protection of inorganic substrates. Unlike functional silanes, alkyl silanes do not participate in polymer crosslinking or chemical coupling with organic resins. Their performance is driven by alkyl chain length, alkoxy structure, and surface penetration behavior.
They are widely applied in construction, infrastructure, and surface treatment applications, where long-term water repellency and durability are required without altering the substrate’s bulk properties.
The Alkyl Silanes product range typically includes:
This range allows users to balance penetration depth, hydrophobic performance, durability, and application conditions.
(Hydrophobic Performance Perspective)
From a functional standpoint, alkyl silanes can be classified as:
Selection is typically guided by substrate porosity, exposure conditions, desired service life, and application method.
In summary, alkyl silanes are selected when the objective is durable water repellency and surface protection, rather than chemical coupling. Proper selection of alkyl chain length and alkoxy structure ensures optimal performance across construction, infrastructure, and surface treatment applications.
Siliconchemicals Alkyl Silanes are designed for durable hydrophobic surface protection of inorganic substrates.
Ideal for applications where moisture protection and durability are required, not chemical coupling.
Contact Siliconchemicals to discuss your application needs, request technical data, or explore customized amino silane solutions tailored to your formulation and processing requirements.
Alkyl silanes are non-functional (non-reactive) silanes whose performance is governed by surface chemistry and hydrophobic orientation, rather than polymer coupling.
A typical alkyl silane has the general structure:
R–Si(OR′)₃ or R–Si(OR′)₂R′
The alkyl chain length determines water repellency and durability, while the alkoxy type influences reaction rate and processing window.
This mechanism delivers:
Alkyl silanes therefore function as surface protection agents, not coupling agents, making them ideal for construction, infrastructure, and mineral surface treatment applications where moisture control and durability are the primary goals.
Alkyl silanes deliver durable hydrophobic surface protection through chemical bonding to inorganic substrates, providing the following functional advantages:
These advantages make alkyl silanes especially effective for construction, infrastructure, and mineral surface protection applications where moisture control, durability, and substrate integrity are critical.
Alkyl silanes are widely used for hydrophobic surface treatment and moisture protection of inorganic substrates, including:
Alkyl silanes are particularly effective in applications where durable water repellency and substrate protection are required without chemical interaction with organic polymer systems.
Alkyl silanes are used when the primary objective is long-term water repellency and surface protection, rather than chemical coupling or polymer reactivity.
In summary, alkyl silanes are chosen when moisture control, durability, and surface integrity are critical—particularly in construction, infrastructure, and mineral surface protection applications.
Selecting the appropriate alkyl silane depends on matching substrate characteristics, exposure conditions, and desired service life. The following practical guidelines are commonly used in construction and surface-treatment applications.
Alkyl chain length is the primary driver of hydrophobicity and durability:
The alkoxy group controls reaction rate and handling:
For substrates exposed to rain, freeze–thaw cycles, salts, or marine environments, longer alkyl chains and more stable alkoxy structures generally provide better long-term protection.
Choose alkyl silanes by balancing alkyl chain length (hydrophobicity and durability) and alkoxy structure (reactivity and processing window). Proper selection ensures effective water repellency, preserved appearance, and long-lasting surface protection in construction and mineral surface applications.
Packaging: 500 g / 1 kg / 5 kg / 25 kg / 200 kg drums / 1000L IBC container (Customized packaging is available).
Selecting the right silane coupling agent is only the beginning. Successful implementation depends on a reliable end-to-end delivery process—from technical evaluation and product selection to production, quality control, and final shipment. Our integrated support model ensures consistent performance, stable supply, and efficient execution across global applications.
From technical selection to final shipment, we deliver silane coupling agents as a complete, reliable solution—not just a chemical product.
Contact us to discuss your application requirements, request samples, or initiate a customized silane supply program.
Disclaimer
“The information provided herein is based on general industry experience and is intended for reference purposes only. Actual performance and optimal usage conditions may vary depending on formulation, processing methods, substrate characteristics, and end-use requirements. Users are responsible for conducting their own tests and evaluations to determine suitability for their specific applications. No warranty, express or implied, is made regarding the completeness, accuracy, or applicability of this information.”
Selecting the right silane coupling agent is only the first step. Achieving optimal performance often requires application-specific evaluation and formulation optimization. Our technical team provides comprehensive support to ensure successful implementation across diverse material systems.
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Navigate the complexities of the global silane market. This definitive report provides actionable insights, vetted supplier landscapes, and strategic sourcing methodologies to optimize your supply chain in the year ahead.
