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Introducing Polycell Polyfilla Mendall 90,

a white, ready-mixed resin bound filler that stands out as a game changer for both interior and exterior repair tasks. Let’s dive into the incredible features and benefits this product offers:


Key Features

  1. Direct Application: Straight from the tub to your repair area – no added steps required.
  2. Slump Resistant: Maintains its form even in thick layers, ensuring ease of application and consistency.
  3. Quick Drying: Thin layers dry in approximately an hour, while thicker fillings of 10 mm may need up to 24 hours, especially in cold damp conditions.
  4. No Shrinkage: After application, expect a smooth, seamless finish as it dries without any shrinkage.
  5. Robust Adhesion: Known for its impressive adhesion and abrasion resistance.
  6. Weather Resilient: Once dry, it withstands various weather conditions and remains flexible enough to accommodate temperature-induced expansion and contraction without cracking.
  7. Texture & Appearance: Delivered in a smooth paste form.
  8. Packaging Varieties: Available in 500g, 2kg, and 5kg packaging options.


Unique Properties of Polycell Polyfilla Mendall 90

Polycell Polyfilla Mendall 90 is meticulously formulated to address unstable cracks that may shift with temperature fluctuations. However, for structural cracks, it’s advised to seek other solutions. This filler is particularly potent for filling areas where standard fillers fail, such as the join between a cornice and a wall or ceiling. Its heightened adhesion ensures it stays put. Other applications range from repairing glazing where old putty has cracked or fallen out, to stopping of interior or exterior wood floors, fascias, etc. If you wish to use it under clear varnish, tint it with iron oxides to achieve your desired timber colour.


How to Use Polycell Polyfilla Mendall 90

Surface Preparation

  • Remove dust, grease and grime from the surface
  • Remove enamel paint in poor condition
  • Paint nail heads with Plascon Metalcare Mild Steel Primer (UC501)
  • Open cracks to a “V” shape to allow the filler to be pressed into position
  • Prime cracks with Plascon Plaster Primer (UC56) before and after filling


  • Best results are obtained with the product is mixed before use and knifed smooth using a wet knife
  • Apply Polycell Polyfilla Mendall 90 with a putty knife in layers up to 5mm thick
  • The drying time is affected by the thickness of the layer and prevailing weather conditions


  • The repair should be protected from ingress of water during the drying period
  • Although it may be left unpainted it should not be exposed to permanently wet conditions. It is therefore advisable to overcoat Polycell Polyfilla Mendall 90 with either Plascon Plaster Primer (UC56) or Plascon Multi Surface Primer (WUP1)
  • Polycell Polyfilla Mendall 90 is difficult to sand and is best smoothed while wet. If sanding is still necessary, wet sand with 100 grit waterproof paper
  • If a perfectly smooth surface is required on interior areas use Polyfilla Fine Crack Filler (101801) over the filled crack. Allow to dry and sand to a perfect smoothness

Safety Precautions

  • Keep out of reach of children
  • Avoid inhalation of powder/dust
  • Ensure good ventilation during application and drying
  • In case of skin contact, wash with soap and water or a recognised skin cleaner
  • Harmful if swallowed. Do not induce vomiting.  Seek medical attention
  • Avoid contact with eyes. In case of eye contact, wash with copious amounts of water and consult a doctor
  • Refer to Safety Data Sheet for complete information

In essence, whether you’re patching up interior surfaces, sealing gaps in wood floors, or repairing old glazing, Polycell Polyfilla Mendall 90 is your go-to for a durable, flexible, and weather-resistant finish.



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