Cuprinol Ultimate Repair Wood Hardener - 500ml

SKU: 5092495
Cuprinol Ultimate Repair Wood Hardener - 500ml

Cuprinol Ultimate Repair Wood Hardener - 500ml

SKU: 5092495
Regular price £8.07
VAT included.
  • Due to courier issues next day delivery cannot be guaranteed


Cuprinol Ultimate Repair Wood Hardener is a rapid drying formulation for use in the repair of decayed wood. Ideal for use outdoors and indoors, it strengthens, binds and hardens loose wood fibres to provide a solid base for filling or over painting.

• Strengthens, binds and hardens loose wood fibres

• Suitable for all major joinery repairs

• Solvent based

Area Interior and exterior
Recommended Use All major joinery repairs
Base Solvent based
Drying Time 6 hours
Re-Coat Time Do not allow previous coat to dry fully before the next is applied
Recommended Coats 2-3 coats
VOC Levels Very High


Always ensure the surface to be treated is clean, dry and free from any dust, algae, fungi or moss.

• To clean wood give it a good brush with a stiff brush to remove any dirt, debris or loose wood

• If your wood has been effected by algae, fungi or moss this must be removed and can be cleaned with products such as Cuprinol Decking Cleaner or Cuprinol Garden Furniture Cleaner

• Cut away decayed and very soft wood back to a sound base

• Allow wet wood to dry thoroughly before application

• For best results treat area with Cuprinol wood Preserver


Before applying stir the product thoroughly and test a small area to ensure colour and adhesion. Colours can vary dependant on surface to be treated.

• Decant Cuprinol Ultimate Repair Wood Hardener into the cap and using a brush

• Apply liberally to the repair area and immediate surroundings

• Apply 2-3 coats, do not allow previous coat to dry fully before the next is applied

• Allow to harden for at least 6 hours before applying filler

• Lightly sand treated area before painting

• Avoid contact of fluid with sensitive surfaces such as paint or plastic

• Apply only in dry conditions, above 5°C and when bad weather is not forecast

Note: Always follow the manufacturer instructions found on the tin.

Aftercare & Storage

We recommend using Cuprinol Ultra Tough Wood Filler after using Cuprinol Ultimate Repair Wood Hardener.

Store any remaining product in dry conditions and protect from frost and sunlight.


All orders placed on a working day before 2pm will be dispatched on the same day for next working day delivery. Orders placed before 2pm on Friday will be delivered on Monday (excluding bank holidays). Orders placed on weekends and Bank Holidays will be dispatched on the next working day.

Delivery Charges 



Next Working Day




Certain postcodes delivery times and charges may vary please see our list below of effected postcodes. Please contact us prior to ordering, alternatively please ensure your number is on your order and we will contact you to discuss the best delivery method and charges.

AB37 - AB38

IV40 - IV56

PA42 - PA49

AB44 - AB45



AB53 - AB56

IV9 - IV12

PA61 - PA78

CA18 - CA27

KA27 - KA28

PA80 - PA88

HS1 - HS9

KW (All postcodes)

PH17 - PH26

Isle of Man (All IM postcodes)

LA15 - LA23

PH30 - PH44

IV14 - IV29


PH49 - PH50

IV30 - IV32

PA21 - PA38

TR21 - TR25



GY1 - GY10

ZE (All postcodes)

GY1 - GY10

JE1 - JE5

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