Polycell Wood Hardener

Polycell Wood Hardner
  • polycell_wood_hardener Thumbnail
  • woodhardener Thumbnail

Polycell Polyfilla for Wood Hardener is a specialised liquid formulation that penetrates deeply into exterior and interior decayed or rotten wood. It hardens the softened fibres, seals the surface against moisture penetration and forms a solid base for filling once dry.

  • Penetrates deeply into decayed or rotten wood.
  • Reinforces and hardens softened wood fibres.
  • Provides a solid base for filling.
  • Maximises the durability of any wet rot repair.


  • ToolsPaint brush
  • Difficulty leveltwo stars
  • Pack size250ml and 500ml
  • Drying timeSurface dry after 6 hours (depending on conditions)

How to apply

  • Difficulty levelstarstwo stars difficultylevel

Shake can well prior to use.


Decant product into the cap and apply liberally to the affected and immediate surrounding area with a paint brush, ensuring full saturation of the wood for maximum absorption. Note: Drilling small holes into the affected area can achieve an even deeper hardening effect.


For best results apply 2-3 coats and leave to dry for 6 hours.


Remove excess product with a wire brush before filling the damaged area with Polycell Polyfilla for Wood Large Repairs.


Prior to painting, staining or varnishing, sand off any remaining wood hardener.


Tools you need

  • Paint brush

Available in the following webshops

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Call us0333 222 7171
(on working days between 08:15 and 16:45)

Find your nearest Polycell stockist:

You can find Polycell products in many supermarkets, major DIY stores and smaller independent stores throughout the UK. The range they stock may vary, so it's a good idea to check product availability with them in advance to avoid disappointment.

Contact Polycell UK
0333 222 7171
9.00 - 17.00