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Product Code: PP1-GC18

15 kg
1.5 kg
100 g
Alkyl Silane - Conventional Surface Bonding

Aliphatic, fluorinated aliphatic or substituted aromatic hydrocarbon substituents are the hydrophobic entities which enable silanes to induce surface hydrophobicity. The organic substitution of the silane must be non-polar. The hydrophobic effect of the organic substitution can be related to the free energy of transfer of hydrocarbon molecules from an aqueous phase to a homogeneous hydrocarbon phase. A successful hydrophobic coating must eliminate or mitigate hydrogen bonding and shield polar surfaces from interaction with water by creating a non-polar interphase. Although silane and silicone derived coatings are in general the most hydrophobic, they maintain a high degree of permeability to water vapor. This allows coatings to breathe and reduce deterioration at the coating interface associated with entrapped water. Since ions are not transported through non-polar silane and silicone coatings, they offer protection to composite structures ranging from pigmented coatings to rebar reinforced concrete. A selection guide for hydrophobic silanes can be found on pages 22-31 of the Hydrophobicity, Hydrophilicity and Silane Surface Modification brochure.

Glassclad® 18; Octadecyl functional silane
  • 20% in t-butanol/diacetone alcohol
  • Pour point: 4 °C
  • Coefficient of friction of treated glass surface: 0.2 - 0.3
  • Surface resistivity of treated surface: 1.2 x 1013 ohms
  • Hazy, amber liquid
  • Water-dispersible hydrophobic surface treatment
  • Surface conductivity of glass substrates is reduced by application of Glassclad® 18
  • Surface arc-tracking is eliminated on fluorescent light bulbs
  • Reduces blood protein adsorption
  • Alternative Name: Octadecyl functional silane, 20% in t-butanol/diacetone alcohol

    Specific Gravity: 0.88

    Elongation: N/A

    Flashpoint: 10°C (50°F)

    HMIS Key: 2-4-1-X

    Hydrolytic Sensitivity: 7: reacts slowly with moisture/water


    Application: Reduces blood protein adsorption.1

    Reference: 1. Arkles, B. et al. In Silanes Surfaces & Interfaces; Leyden, D., Ed; Gordon & Breach: 1986; p 91.

    Additional Properties: Surface resistivity of treated surface: 1.2 x 1013 ohms
    ?c of treated glass surface: 31 mN/m
    Pour point: 4?C
    OCTADECYL FUNCTIONAL SILANE, 20% in t-butanol/diacetone alcohol