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Fasto S890 – Low Odour Neutral Cure Paintable RTV Sealant

Fasto S890 is a one-part, low-odour, neutral cure, non-corrosive RTV silicone sealant developed for professional sealing applications where paintability, moisture resistance, and clean finish are critical. Its all-weather performance and excellent adhesion make it suitable for electrical, mechanical, automotive, and construction assemblies.

Unlike conventional silicone sealants, Fasto S890 can be painted after curing, making it ideal for applications where aesthetic finish and surface compatibility are important.

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Key Features

  • Neutral Cure & Non-Corrosive
    Safe for metals and sensitive substrates.
  • Low Odour Formulation
    Comfortable application in indoor and enclosed environments.
  • Paintable After Curing
    Suitable for visible joints and finished surfaces.
  • Excellent Water & Moisture Resistance
    Reliable sealing in damp and humid conditions.
  • All-Weather Performance
    Resists UV exposure, moisture, and temperature variations.
  • Strong Adhesion to Multiple Substrates
    Bonds well with metal, wood, ceramic, concrete, glass, plastics, and rubber.

Benefits

  • Enables paint-ready sealing for architectural and industrial finishes
  • Provides clean, professional joint appearance
  • Reduces corrosion risk on metal substrates
  • Ideal for construction, HVAC, and assembly applications
  • Ensures long-lasting sealing with minimal maintenance

Application details are available on request. Please contact our technical team.

Surface Preparation

  • Ensure surfaces are clean, dry, and free from dust, grease, oil, rust, scale, and contaminants.
  • Clean surfaces using a suitable Fasto cleaner for best adhesion.

Application Method

  1. Apply Fasto S890 using a manual or pneumatic dispensing gun.
  2. Extrude a continuous and uniform bead onto the prepared joint.
  3. Assemble or tool the joint before skin-over time.
  4. Apply sufficient material to ensure complete sealing.
  5. Remove excess sealant and masking tape before skinning occurs.

Curing Information

  • Skin formation: 15–25 minutes
  • Tack-free time: 25–35 minutes
  • Full cure: 24 hours
    (Curing time depends on ambient temperature, humidity, and joint thickness)

To access Technical & Safety Documents, please submit your details.

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