Fasto MS50 - Silicone Compound Sealant

Fasto MS50 – High Strength Silane Modified Polymer Adhesive Sealant

Fasto MS50 is a one-part, silane modified polymer (MS Polymer) based high-performance adhesive sealant designed for structural bonding and elastic sealing applications. It combines the advantages of both polyurethane (PU) and silicone technologies while being solvent-free, isocyanate-free, and odourless.

Engineered for high strength, flexibility, and superior weather resistance, Fasto MS50 delivers durable bonding performance across automotive, construction, marine, HVAC, and industrial sectors.

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Key Features

  • Silane Modified Polymer Technology
    Combines strength of PU with durability of silicone.
  • High Strength Bonding (2.2 MPa)
    Suitable for structural and semi-structural bonding.
  • Non-Sag & High Build
    Maintains bead shape in vertical and overhead applications.
  • UV, Weather & Water Resistant
    Excellent long-term outdoor durability.
  • Paintable Surface
    Can be over-coated after tack-free stage.
  • Solvent-Free & Isocyanate-Free
    Safe, low-odor formulation.
  • Permanent Elasticity (>200% Elongation)
    Absorbs vibration and joint movement.

Benefits

  • Strong and flexible structural bonding
  • Long-term resistance against harsh environments
  • Ideal replacement for PU and silicone in many applications
  • Safe application without hazardous solvents
  • Reduced cracking and shrinkage over time
  • Suitable for automotive, marine, HVAC, and construction industries

 

Primary Application Sub-Applications Functional Purpose Key Performance Advantage
Automotive & Vehicle Assembly Bus body, railway carriage, vehicle seams Structural bonding & seam sealing High strength & vibration resistance
Marine & Container Sealing Ship panels, boat seams, containers Water-tight elastic sealing Seawater & UV resistant
HVAC & Industrial Equipment Air ducts, equipment housings Flexible sealing & bonding Non-sag, durable bond
Solar & Electrical Solar panels, telecom enclosures Weatherproof bonding UV & moisture resistant
Construction & Engineering Metal panels, glass, ceramics Structural adhesion Paintable & permanent elasticity
Appliance & OEM Manufacturing Kitchen appliances, machinery Shock & vibration absorption Strong flexible bond

Surface Preparation

  • Remove rust, scale, dust, grease, oil, and contaminants.
  • Clean surfaces using suitable Fasto cleaner if required.
  • Ensure substrates are clean, dry, and structurally sound.

Application Method

  1. Apply Fasto MS50 using standard dispensing equipment.
  2. Assemble parts immediately to avoid skin formation.
  3. Apply sufficient material for proper bonding or sealing.
  4. Tool the joint before skin formation.
  5. Remove excess sealant and masking tape before skinning.

Application Temperature: 5°C to 40°C
(Optimum: 15°C to 25°C)

Curing Information

  • Tack Free Time: ~30 minutes*
  • Full Cure: 24 hours*
  • Curing depends on humidity and temperature

Joint & Sealing Guidelines

  • Use masking tape for neat finishing.
  • Suitable for seam and joint sealing in dynamic applications.
  • Can be over-painted after becoming tack-free (compatibility testing recommended).
  • Expose to baking temperatures only after full curing

 

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