Silanes & Alkyl Silanes
N-Octyltrimethoxysilane | Manta L310
Manta L310 is n-octyltrimethoxysilane (CAS 3069-40-7), an alkyl silane used as a penetrating water repellent for natural stone, concrete and masonry and as a hydrophobic modifier for mineral fillers and glass. Its methoxy groups hydrolyze significantly faster than ethoxy counterparts, which suits rapid curing applications.
- Grade
- L310
- Chemical Name
- N-Octyltrimethoxysilane
- CAS No.
- 3069-40-7
- EINECS
- 221-338-7
- Synonyms
- Trimethoxyoctylsilane
- Form
- Colorless transparent liquid
Overview
Manta L310 is N-octyltrimethoxysilane, a methoxy-functional alkyl silane. Its methoxy groups hydrolyze significantly faster than those of ethoxy counterparts, which makes it effective in rapid curing applications.
On reaction with atmospheric or substrate moisture, L310 penetrates mineral matrices and forms a durable, breathable, water-repellent siloxane network. It imparts uniform surface hydrophobicity with a dry, non-tacky feel and preserves the substrate's original appearance.
L310 is the trimethoxy counterpart of Manta L320, which carries the same octyl chain with triethoxy groups. L310 hydrolyzes faster and releases methanol, while L320 releases ethanol, so the choice depends on the cure speed and hydrolysis by-product your process calls for.
Key Features
- Methoxy functionality for significantly faster hydrolysis than ethoxy counterparts
- Penetrates mineral matrices and forms a durable, breathable siloxane network
- Uniform surface hydrophobicity with a dry, non-tacky feel
- Preserves the substrate's original appearance
- Helps to limit water absorption without blocking pores
- Improves the hydrophobicity and dispersibility of mineral fillers
Cross-Reference
Manta L310 can be considered as an alternative to Dow XIAMETER OFS-6665, Evonik Dynasylan OCTMO and Shin-Etsu KBM-3083.
Trademarks are the property of their respective owners; no affiliation is implied.
Specifications
| Property | Typical Value |
|---|---|
| Appearance | Colorless transparent liquid |
| Purity (by GC, %) | 98.0 min |
| Specific Gravity (ρ20°C, g/cm3) | 0.902~0.912 |
| Refractive Index (nD 25°C) | 1.4120–1.4220 |
Typical values from the current Technical Data Sheet.
Applications
- Stone protection (primary): penetrates marble, granite and sandstone for breathable waterproofing and anti-efflorescence with a dry, non-tacky finish that preserves the natural appearance
- Concrete and masonry waterproofing: penetrating sealer or integral admixture that helps to limit water absorption, freeze-thaw damage and chloride ingress without blocking pores
- Mineral filler modification: enhances the hydrophobicity and dispersibility of fillers such as silica, talc and glass fibers in plastics, rubber and coatings, while improving electrical insulation
- Glass and ceramic coatings: ultra-thin, durable hydrophobic layer with good anti-fouling and easy-to-clean properties for architectural and photovoltaic glass
Related applications: Concrete, Masonry & Stone Protection · Liquid Waterproofing & Construction · Paints & Coatings · Plastics & Masterbatches
Packaging & Storage
Supplied in 20 kg pail, 180 kg drum and 900 kg IBC.
Safety and Storage
Keep in a cool and dry place and avoid storage in direct sunlight. Shelf life is 12 months. It is non-hazardous substance.
Documents
- Technical Data Sheet · PDF Download TDS
- SDS and COA · on request Request Documents
Frequently Asked Questions
When is Manta L310 a better choice than Manta L320?
Choose L310 when rapid curing matters: its methoxy functionality hydrolyzes significantly faster than the ethoxy groups of L320, n-octyltriethoxysilane. L310 releases methanol on hydrolysis and L320 releases ethanol. Both give breathable octyl-based water repellency on mineral substrates.
What protection does L310 give concrete and natural stone?
Used as a penetrating sealer or integral admixture on concrete and masonry, it helps to limit water absorption, freeze-thaw damage and chloride ingress without blocking pores. On marble, granite and sandstone it adds breathable waterproofing and anti-efflorescence with a dry, non-tacky finish that preserves the natural appearance.
Can L310 be used outside of construction applications?
Yes. It enhances the hydrophobicity and dispersibility of fillers such as silica, talc and glass fibers in plastics, rubber and coatings while improving electrical insulation, and it forms ultra-thin, durable hydrophobic layers with easy-to-clean properties on architectural and photovoltaic glass.
Related Products
L310 is one step in the building protection formulation chain. One inquiry can cover the other raw materials in your formulation, with samples, technical documents, quotation and shipment handled together.
- Alkyl Silane Actives
- Emulsions & Pastes
- Siliconate Liquids & Powders
- Waterproof Coatings
Looking for a different purity, functional group, or a structure not listed here? Contact our technical team.
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