Teal Windows - Sliding Windows

Timber Product Care

Extend the life of the coating and appearance of timber by reviewing our product care information and following a regular maintenance and care program. 

The team at Teal Windows can advise on the selection of the most suitable timber finish to suit your individual home plan and needs. Professional paint suppliers and painters can also assist with this important advice.

  • Our timber products must be fully sealed on all four edges and two faces with a suitable sealant to protect them from moisture.
  • Most timbers have a good reputation for accepting and holding timber finishers for extended periods.
  • The normal life of a finish will be shortened by degradation and discolouration.
  • Contact Teal Windows if you have any questions.


The causes of discolouration, though not in themselves a failure of the finish, often require remedial treatment. Dirt is the most benign cause of discolouration and not usually a problem. A periodic cleaning with a mild detergent solution will usually restore the surface finish.

Mould and Mildew

 Mould and mildew is a common cause of discolouration of paint, solid-colour stains and natural finishes. This applies both to the fungus and to its staining effects on both the finish and the wood.

  • Re-staining will not solve a mould and mildew problem.
  • Before refinishing, advice should be sought from the manufacturer of the previous finish and/or the tradesperson responsible for the finish.
  • All mould and mildew should be cleaned off with a commercial remover followed by a coating containing an effective mildewcide.

Extractive bleeds

In timber products, there can be natural compounds called “extractives” that seep out over time and can discolour the finish. This bleeding of extractives typically occurs due to exposure to moisture. In other words, when timber is exposed to moisture, certain substances within it can leach out and affect the appearance of the finish, potentially causing discolouration.

  • Moisture problems must be eliminated to stop stains caused by extractives bleeding.
  • Mild staining is often washed away by rain over a period of weeks.
  • In sheltered areas of the building where the stain persists, it may become darker with age and more difficult to remove.
  • If washing with a mild detergent solution does not work a commercial product may be of benefit.

Iron stains

Iron staining may appear in two forms, namely, the reddish brown discolouration caused by rust and blue-black discolouration caused by the reaction of iron from nails and other metal objects with extractives from the timber.

  • To prevent such stains use only hot-dipped galvanised, aluminium or stainless steel nails when fastening timber.

Water stains

Water stains often occur in combination with extractive bleed and mildew growth. These stains can be difficult to remove.

  • Scrubbing the wood with an oxalic solution is sometimes effective.

Teal Timber Tannin Cleaner

Tannin is the stain that exudes from unsealed timber. Teal Windows uses a trusted superior tannin cleaner specifically designed for the leeching and removal of tannin from timber.

  • Tannin Cleaner will remove the majority of tannin out of the timber. However, there is a slight possibility a small amount of tannin may still leech out at a later date under certain conditions.
  • Tannin Cleaner will aid in preventing leeching stains from running down walls or staining tiles etc. This is achieved by washing all components of joinery two or three times after sanding and then sanding lightly again. This process is very time consuming.
  • Tannin is not a concern in many projects but if it is a concern for you please don’t hesitate to ask.
  • Send an enquiry to Teal Windows and we will get back to you.
  • If you purchase this product separately from a hardware store or paint supplier, do not wash any products where leeching can run or splash on a porous product or item that may be susceptible to staining.
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