FAQ

I have badly decayed structural timber (posts, poles, bearers or joists), will Preschem’s timber preservative products fix the problem.

Preschem’s timber preservative products will kill, prevent and control rot within reason, but will not restore decay weakened timber. Badly decayed structural timber must be replaced by a registered professional tradesman.

Can I paint over Preschem’s Timber Preserver or No-Rot Gel?

No-Rot Gel

Yes. For best results allow the preservative to dry for as minimum of 24 hours. Use can then use a “builders bog” type filler and quality oil based primer then your choice of quality exterior oil or acrylic top coat.

Timber Preserver:

Yes, but with caution. Timber Preserver’s active ingredeint, Copper Naphthenate, is also used as a paint drier in oil based paints. As such it can be prone to colour bleed. To paint over Timber preserver we recommend the following:

  • Allow at least 2 weeks to dry. Preferably more if practicable.
  • Use a quality stain block type acrylic primer such as those made by Zinsser or Dulux
  • If colour bleed through occurs with the primer, do not continue painting. Strip back the primer to bare timber and allow a further 2-3 weeks to dry.

How long will Preschem’s Preservatives last?

This is subject the the environment the timber is in and how much persistent moisture is present, but for most normal situations:

Timber Preserver: 4-5 years
No-Rot: 4-6 years
No-Rot Gel: 4-5 years (note that exposed exterior timber must be sealed with a quality exterior paint, otherwise the expected life will be 6-8 months)

How do I extend the life of Preschem’s preservative systems?

Remove the source of moisture. Moisture will degrade timber and the Preschem preservative system applied over time. If the source of moisture is removed, then Preschem products will remain in the timber almost indefinitely waiting to protect the timber when moisture becomes an issue again. Sealing the timber with a quality paint is the simplest and most effective means of controlling moisture in timber when its above ground.

I have found active termites in the timber in my home, will Preschem’s preservative products kill the nest and stop the infestation?

No-Rot and No-Rot Gel have a very limited ability to control termites, while Timber Preserver has no ability to do so. If you find termites in your home, then the only safe course of action is to contact a registered pest controller who specialises in termite infestation. They will be able to asses the damage done and a course of action to eradicate the termite nest.

Is Aussie Clear or Aussie Clear Light suitable for any hardwood species?

Yes, Aussie Clear and Aussie Clear Light are suitable for all hardwood species and also for Cedar (which is a softwood).

Note that Aussie Clear and Aussie Clear Light have different coloured pigments, so on mid to dark toned hardwoods, either version of Aussie Clear will appear transparent. However, on blond or light coloured hardwoods, the pigment colour will be noticeable. Aussie Clear Light is the colour that most people will prefer on blond coloured timber as the finish will resemble “wet straw” in most instances.

Does Aussie Clear or Aussie Clear Light contain any tints?

Yes, both Aussie Clear and Aussie Clear Light are tinted with “clear” tints. They serve three important functions:

  1. To assist with maintaining the colour of the timber as the oil fades, for a more even and natural look
  2. Restore the natural “as new” timber colour when the natural timber pigments bleed out
  3. Offer the best possible protection against UV weathering

Aussie Clear is tinted to be “transparent” on mid to dark toned timbers, whilst appearing a reddish-orange on light or “blond” timber.

Aussie Clear Light is tinted for light coloured or “blond” hardwood timbers to appear like “wet straw”. Aussie Clear Light can also be used on mid to dark toned hardwood timbers too.