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V-TUF Zylock PL050 Gasket Sealer is a Black RTV Silicone sealant of high performance that is low corrosivity and high temperature resistant.
V-TUF Zylock PL050 is a high performance one component moisture curing gasket sealant for high temperature applications over 200°C. This Replaces almost any cut gasket. Resists cracking, shrinkage and migration. Can be applied to dress paper or cork pre-cut shapes.

Ideal for use with auto /workshop fluids and gases. V-TUF  Zylock PL050 Gasket Sealant has good resistance to weathering, vibration, moisture, ozone and extreme temperatures. Fully cured PL050 can be used for extended periods at temperatures up to 204°C. Bottle designed to give you all the contents, so no waste!
Eliminates leaks, reduces noise, absorbs vibration, seals and bonds assembly into a secure unit. IDEAL FOR: Gear boxes, engines and any other oil or fluid housing.

Method of Use
This solution is ready for use. Simply pull off the grey cap. Take off the nib of the spout using a sharp knife. Then tilt the bottle downwards, and gently press the trigger on the side of the bottle, and you should begin to see the black liquid; the professional V-TUF Gasket Sealant is ready for use.

  • Rated up to 204ºC (260ºC Intermittent)
  • Fast Cure
  • Low Volatile
  • Controlled Dispensing
  • No mess
  • Single handed application direct from nozzle
  • Can be used vertically or horizontally in a continuous bead


  • For Sealing Gaskets
  • For Sealing Gearboxes
  • For Sealing Parts on Engines
  • For Sealing on Fluid Housing Parts
  • For Sealing on production line parts
  • For Sealing on assembly line parts
  • For engineers
  • For Sealing parts on agricultural machinery


  • Type: Polysiloxane based compound, Acetoxy curing
  • Consistency: Non-Sag Paste
  • Specific gravity: 1.02
  • Temperature Resistance: -40 to +204°C Continuous

    Physical Properties (cured product)
    (Measured on 3mm a day is the general rule for curing)
  • Initial strength: 12 minutes
  • Final strength: 24 hours

    Cured – Physical
  • ASTM D 676 Durometer Hardness, Shore A, points: 30
  • ASTM D 412 Tensile Strength, psi (MPa): 350
  • ASTM D 412 Elongation, % 500
  • ASTM D 746 Brittle Point, degrees -73°C
  • ASTM D 2137A Volume Coeffiient of Thermal Expansion, (0°C 100°C) 9.3 X 10-4
  • Thermal Conductivity, cal/(cm) (degree C): 0.45 X 10-3
  • BTU per (ft) (degrees F) (hr): 0.11

    Cured – Electrical
  • ASTM D 257 Volume Resistivity, ohm-cm 1.5 X 1015
  • ASTM D 149 Dielectric Strength, **volts/mil 550
  • Statics Shear (oiled fim) 21-24 N/mm(2) (ISO/MIL)
  • ASTM D 150 Dielectric Constant
  • At 60 Hz 2.8
  • At 100 Hz 2.8
  • At 100 kHz 2.8
  • ASTM D 150 Dissipation Factor
  • At 60 Hz 0.0015
  • At 100 Hz 0.0015
  • At 100 kHz 0.0015

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