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Fasto S887 – Neutral Cure RTV Silicone Sealant

Fasto S887 is a one-part, neutral cure, non-corrosive RTV silicone sealant designed for durable sealing, bonding, and glazing applications across electrical, mechanical, automotive, and construction industries. Its neutral cure formulation ensures safe use on metals and sensitive substrates, while delivering excellent resistance to environmental exposure.

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Key Features

  • Neutral Cure & Non-Corrosive Chemistry
    Does not corrode metals or damage sensitive surfaces.
  • Single-Component, Ready-to-Use
    No mixing required; easy application with standard dispensing tools.
  • High Flexibility & Elasticity
    Accommodates joint movement, vibration, and thermal expansion.
  • Excellent Weather & UV Resistance
    Performs reliably under sunlight, moisture, ozone, and pollutants.
  • Wide Substrate Compatibility
    Bonds effectively to steel, aluminium, glass, plastics, rubber, ceramics, and concrete.
  • Indoor & Outdoor Application Suitable
    Maintains performance in exposed and semi-exposed conditions.

Benefits

  • Provides long-lasting, corrosion-free sealing
  • Reduces maintenance and rework costs
  • Maintains joint integrity under temperature fluctuations
  • Suitable for multi-industry applications, minimizing inventory complexity
  • Delivers a clean, professional finish for visible joints

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

Surface Preparation

  • Ensure all surfaces are clean, dry, and free from dust, oil, grease, rust, scale, and contaminants.
  • Use a suitable Fasto cleaner for optimal adhesion.

Application Method

  1. Apply Fasto S887 using a manual or pneumatic dispensing gun.
  2. Extrude a continuous, uniform bead onto the prepared surface.
  3. Assemble or tool joints immediately to prevent premature skin formation.
  4. Remove excess sealant using an appropriate cleaner.

Construction & Expansion Joints

  • Ensure joint substrates are sound and contaminant-free.
  • For larger joints, use a backer rod or bond breaker tape.
  • Apply masking tape for neat edges and remove it after tooling and before skinning.

Curing Information

  • Skin formation: 10–14 minutes
  • Tack-free time: 20–25 minutes
  • Full cure: 24 hours
    (Curing time depends on ambient temperature, humidity, and joint depth)

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

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