New timber contains tannin and oils that repel coatings and prevent them from adhering. Before protecting new timber with a coating, you’ll need to make sure the surface tannin & oil is removed.
Do I need to wait for weathering before coating?
Weathering relies on timber naturally getting wet and dry several times to leach the tannin & oils, generally this takes between 4- 6 weeks but depends on weather exposure and your type of timber. Due to the variables in weather conditions it is not a reliable process and it is difficult to tell if the timber has been allowed to weather adequately.
NOTE: Timber type will make a big difference to how much natural weathering is required, merbau, spotted gum and jarrah are tannin rich and oily and require longer to naturally weather.
Coat new timber immediately, no weathering required
Intergrain® UltraPrep™ Tannin & Oil Remover instantly extracts surface tannin and oils making it the fastest and most reliable way to ensure the surface of any new timber has been adequately leached of tannin and oil.
Step 1. Quickly and effectively remove tannin & oil
Scrub the timber with Intergrain® UltraPrep™ Tannin & Oil Remover
- Remove surface dirt by sweeping, wet the timber surface with water.
- Apply UltraPrep Tannin & Oil Remover (following label instructions) undiluted to the timber with a stiff bristle broom.
- Leave on the timber for 10–15 minutes. If necessary, apply more product to keep timber damp throughout this period.
- Scrub vigorously with a stiff broom. Do not use a wire brush.
- Rinse off exterior surfaces thoroughly using maximum pressure from a garden hose or using a high pressure water cleaner. For best results, a high pressure water cleaner is recommended.
- If stubborn areas remain, repeat application in those areas as per the instructions above.
Step 2. Clean, neutralise and decontaminate the surface
Scrub the timber with Intergrain UltraPrep Timber Cleaner
- Shake Intergrain UltraPrep Timber Cleaner Mix 1 part UltraPrep Timber Cleaner to 4 parts water in a plastic container. For severe staining or grey timber a stronger solution or repeat applications may be necessary.
- Wet the timber surface with water.
- Apply mixture generously to the timber with a stiff bristle brush, broom. Scrub the timber vigorously. Clean complete sections at one time. Spot cleaning should be avoided to prevent patchy results.
- Leave mixture on the timber for 10-15 minutes. If necessary, apply more mixture to keep timber damp throughout this period.
- Rinse off exterior surfaces thoroughly using maximum pressure from a garden hose or using a high pressure water cleaner. A high pressure water cleaner is recommended for large areas or badly discoloured timber. Note: Failure to thoroughly remove mixture may result in timber discolouration under clear finishes.
- Allow timber to dry thoroughly before applying further products.
Pictured: Timber - Merbau, Cleaned with - UltraPrep Tannin & Oil remover and UltraPrep Timber Cleaner
Step 3. Apply your coating
Pictured: Timber - Merbau, Coating - UltraDeck Merbau 2 coats