HydraWash

Before you start

• Check the weather. Avoid hot direct sun (the mix dries too fast) and strong wind (drift onto gardens, cars and neighbours).
• Put on your PPE: chemical goggles or a face shield, chemical-resistant gloves, long sleeves and boots.
• Walk the site. Note plants, lawns, ponds, pools, cars, glass, painted surfaces, Colorbond and anodised aluminium frames. Move what you can and plan to keep the rest wet.
• Test a small, hidden patch on anything painted, coated, timber or dark, and check it after rinsing.
• Have plenty of clean water on hand for pre-wetting and rinsing.

Step by step

1. 1

   Mix it

   Use the calculator above. Part-fill the tank with water, add the chlorine and HydraWash, then top up with water to your tank size. Start with the weakest strength that suits the job.

   Tip: For an X-Jet, pick your ratio (or your target strength) on the X-Jet tab and mix the bucket as it shows. Check the strength at the gun — draw varies with machine, tips and hose length.

2. 2

   Pre-wet everything around the work area

   Soak plants, lawns, glass and anything below where you are spraying. Wet surfaces absorb less of the mix. Keep them wet for the whole job.

3. 3

   Apply from the bottom up

   Spray at low pressure, starting at the bottom of the wall and working up. Working bottom up stops runs of mix streaking down over dry, dirty wall.

4. 4

   Let it dwell 5–10 minutes

   Give it time to work. Do not let it dry on the surface — if an area starts to dry, mist it lightly with more mix.

5. 5

   Rinse from the top down

   Rinse with low pressure and plenty of water, from the top down, so dirty water runs over areas you have not finished rinsing. Then rinse glass, frames and plants again.

6. 6

   Check and repeat

   If staining remains, repeat on that area rather than going straight to a stronger mix. Heavy lichen on roofs may need a HydraBio follow-up on a separate day.

7. 7

   Clean up

   Mix fresh for each job — chlorine loses strength once mixed. Flush your pump, lines and tank with clean water at the end of the day.

Do not mix. Never mix with acids. Do not mix with HydraBio. With HydraPure or HydraChlor, dissolve the powder fully first and add HydraWash last.

Surface guide

Painted render and weatherboards

1.25–2%. Test first. Keep dwell short and rinse thoroughly.

Brick and unpainted render

2%. Rinse well, including the base of the wall.

Roofs (tile)

3%. Lichen and heavy growth up to 4%.

Colorbond, anodised aluminium, powder coat

Keep contact short and rinse very well. Above 3%, protect or rinse these continuously.

Glass

Pre-wet and rinse well to avoid spotting.

Timber

Chlorine can lighten timber. Use the weakest mix and test first.

Concrete and flatwork

Heavy staining up to 6% (48 L chlorine per 100 L) from a buffer tank only — an X-Jet cannot reach it.

Troubleshooting

Safety

DANGER Causes severe skin burns and eye damage. Harmful if swallowed.

Wear protective gloves, protective clothing, eye protection and face protection. Do not breathe mist, vapours or spray.

First aid

If swallowed

Rinse mouth. Do NOT induce vomiting. Immediately call a Poisons Information Centre or doctor.

If on skin (or hair)

Take off immediately all contaminated clothing. Rinse skin with water or shower.

If in eyes

Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

If inhaled

Remove person to fresh air and keep comfortable for breathing.

If in doubt, call the Poisons Information Centre on 13 11 26. In an emergency dial 000.

Storage

Store locked up in a well-ventilated place. Keep closed. Keep away from acids.