Dam & Pond Sealer F.A.Q.

How does it work?

Can it be applied to dry dams?

No, at this stage our product performance is based on applying the product to dams with water in them. Current trial work may present a new application scenario for the future.

We use our dam for drinking water – is this product safe?

Yes. Aqua Plastech Dam & Pond Sealer is based on a non-toxic polymer and tests have shown it is safe for use in potable water. Once activated Aqua Plastech Dam & Pond Sealer will attach to the bottom of the dam. If you are pumping your water from a dam, just ensure your intake pipe is suspended under a float and you don’t pump from off the bottom (as you will also end up pumping silt and debris)

I can’t wait for rain but need to make sure my dam won’t leak when it does – can I apply Aqua Plastech Dam & Pond Sealer to a dry dam?

Yes you can. Aqua Plastech Dam & Pond Sealer will degrade faster in sunlight so you will need to apply to the dry base of the dam and then cover with a small layer of soil. If possible, try to pre-wet the soil before filling so Aqua Plastech Dam & Pond Sealer can bind and stabilise the soil. We also recommend you try to install some devices to slow down water inflow into the dam/pond such as ‘whoa boys’ or small banks and drains across the path to slow the water as it fills the dam.

Why does my dam need to be full before I fix the leak?

It doesn’t need to be full, but the higher the water level the greater the pressure. High water pressure will generally increase the speed of the leak and this water flow through the soil helps carry Aqua Plastech Dam & Pond Sealer particles quickly into the cracks and crevices where it can plug them. When water levels are low, often the rate of leaking will slow down or even stop.

I have a fast leak – can I use more to fix it faster?

The recommended application rate of 100g per m2 is usually all that is required to fix the leaks. For really fast leaks multiple applications are the best way to bring these under control – try passing over the same area twice during the initial application but apply more sparingly and then follow up with another light application a week later if required.

Do I need to know where the dam is leaking to fix it?

No. When the location of the leak isn’t known you can apply Aqua Plastech Dam & Pond Sealer over the entire surface area to repair the leak. If you have a good idea where the leak is located (e.g. damp sections on the dam walls) you can focus application on that area of the dam or pond only. It is a good idea to apply slightly more to deeper sections and slightly less to shallower sections of dam. Try to understand the depth profile of your dam before application. Deeper sections of the dam adjoining constructed walls or embankments will be under more water pressure and tend to be key problem spots. Try application along these areas first to slow leaks then apply over the entire surface.

Do I need to know the soil type or estimate how fast or slowly my dam it is leaking?

No. Aqua Plastech Dam & Pond Sealer is designed to work across a broad range of soil, sand and rock types and will repair both fast and slow leaks

My dam is still leaking after application – why?

If your dam/pond continues to leak after application of Aqua Plastech Dam & Pond Sealer the most common problem is found to be some areas have been missed or with insufficient powder applied during application. This can usually be rectified by re-applying. On larger dams it is more difficult to confirm what areas have been treated. One suggestion is to place steel fence pickets along the edges and use these as a guide to apply in a grid pattern ensuring all areas are covered. Another common issue is that Aqua Plastech Dam & Pond Sealer is applied unevenly by hand. Aqua Plastech Dam & Pond Sealer contains powders with a range of particle sizes. The larger particles can be ‘thrown’ further by hand but the smaller particles do not distribute as well. Try to ensure you work on smaller areas and don’t attempt to ‘throw’ the powder long distances away from you.

Why does it matter if my water is salty?

Aqua Plastech Dam & Pond Sealer is activated when it comes into contact with water. Osmotic pressure causes the
particles to swell however this capacity to increase in size is reduced by high levels of salt in the water. Aqua Plastech Dam
& Pond Sealer can generally be used on most dams or ponds at the suggested application rate of 100g per m2 of dam
surface area without measuring salt content, however if you suspect your water has a high salt content you will need to
apply more Aqua Plastech Dam & Pond Sealer to compensate for the reduced capacity of the polymer. High levels of salts
are not commonly found in surface water and more common in artesian (e.g. bore) water.

What happens to the polymer when it breaks down?

Aqua Plastech Dam & Pond Sealer will slowly degrade and break down over time (up to 10 years plus). The polymer will
form a harmless mix of water, potassium salts and carbon dioxide as it breaks down. Leaking will not re-commence - Aqua
Plastech Dam & Pond Sealer forms a permanent plug.

Will Aqua Plastech Dam & Pond Sealer cause longer term problems in soil or water quality?

No. The polymer is very durable but will degrade over a number of years in the soil/water. As it breaks down very small
amounts of potassium salts are released as part of that process. As the level of Aqua Plastech Dam & Pond Sealer
required is so small and the degradation will occur over a long period of time there should be no measurable change to soil
or water quality as a result of applying Aqua Plastech Dam & Pond Sealer. To put this in perspective, applying a single
16kg pail of Aqua Plastech Dam & Pond Sealer to a dam with a surface area of 160m2 would result in the gradual release
of approximately 2.8kg of potassium salts over the lifetime of the polymer (5-10 years) – this equates to only 2.8kg of salts
in approx. 320,000 litres of water.

Will my dam or pond leak again after the polymer breaks down?

Very Unlikely. The chemical structure of the polymer is very stable due to the cross linking which occurs during
production. This cross linking forms very strong chemical bonds between the elements and provides a very durable
polymer that can withstand multiple wet/dry cycles with no damage to the properties of the polymer. As Aqua Plastech Dam
& Pond Sealer is drawn deep into crevices, cracks and porous soils by water pressure it also draws other suspended
matter in the water downward to cover it. The combination of expansion and attraction of particles over the top acts to form
permanent plugs even if the polymer gradually degrades and loses its ability to expand/contract.

Can my livestock use the dam?

Yes – no problem. Aqua Plastech Dam & Pond Sealer is designed with a high molecular weight and this results in it
being drawn downwards to the bottom of the dam/pond. Livestock will naturally drink water from the surface to avoid
ingesting mud and other debris from the bottom. The positive charge of the polymer is very strong and it will remain
attached to or buried at the bottom. Should there be heavy inflows to the dam as a result of storms, turbidity is likely to
occur and some polymer may be displaced, however this will settle very quickly. If livestock do ingest the polymer it will
pass harmlessly through.

Will the polymer change the colour of my pond?

No. Aqua Plastech Dam & Pond Sealer is crystal clear and will remain so. Even if used in very silty and dirty water like
farm dams it will remain clear and not absorb any silt or clay. In very dirty water Aqua Plastech Dam & Pond Sealer attracts
suspended particles and draws these to the bottom which helps to clear cloudy water.

We have lots of water lilies and aquatic plants in our dam – can we use Aqua Plastech Dam & Pond Sealer?

Yes. For best results we suggest removing plants before application if these can be removed. If you have plants with
large leaves which cover the surface, you can pre-mix small quantities of Aqua Plastech Dam & Pond Sealer in a bucket
and pour this into the water. You must work quickly using small amounts - half fill a bucket with water, drop in half a cup of
Aqua Plastech Dam & Pond Sealer (approx. 150g), stir quickly and then slowly submerge the bucket below the water while
stirring to disperse. Avoid walking through this area.

Can I use spray equipment to apply Aqua Plastech Dam & Pond Sealer?

Aqua Plastech Dam & Pond Sealer gives best results when applied evenly as a dry powder. Aqua Plastech Dam & Pond
Sealer can be applied wet however it is more difficult to ensure even coverage. The other key issue is the swelling of the
polymer which starts immediately after contact with water. Filters and screens in handheld or agricultural spray equipment
will become clogged if they are used. For wet application larger aperture hoses may be suitable (e.g. firefighting pumps)
but care should be taken to ensure Aqua Plastech Dam & Pond Sealer is mixed and applied as quickly as possible (i.e.
within minutes). A suggested approach for wet application is as follows:

  1. Pre-prime the pump with fresh water
  2. Fill the water holding tank with water prior to addition of Aqua Plastech Dam & Pond Sealer
  3. Spray when there is no wind, or if you have to, with the wind behind you so the spray is carried across the dam.
  4. Start the pump and adjust the hose nozzle to the required spray pattern and to determine what area can be covered without moving the pump.
  5. Add Aqua Plastech Dam & Pond Sealer powder to the tank and stir vigorously - keep the tank agitated while applying
  6. Work in smaller quantities and apply as quickly as possible
  7. Flush the tank and pump in plenty of fresh water immediately after use.

Can I use Aqua Plastech Dam & Pond Sealer with bentonite clay?

Bentonite clay is typically used during dam construction for preparing porous or unsuitable soils. Bentonite cannot be
applied once the dam has water in it. Bentonite is typically mixed with soil or spread as a layer under soil and it expands
when wet to create a seal. Aqua Plastech Dam & Pond Sealer has a chemical charge which causes it to attach to other
particles and can be applied to both empty and full dams. It can be applied to the surface and does not require heavy
earthmoving equipment. Aqua Plastech Dam & Pond Sealer will help activate, stabilise and consolidate Bentonite clay and
when mixed with Bentonite, will lower the amount of Bentonite required.

My hands are going slimy after application – is Aqua Plastech Dam & Pond Sealer toxic?

No, this is how the polymer reacts with water. We suggest you use gloves when handling the powder and if spreading by
hand as this will stop any reaction with the moisture in your skin. If you do get Aqua Plastech Dam & Pond Sealer on your
skin simply wash off with soap and water – the surfactants in the soap or detergent will break the positive charge and allow
water to more easily disperse the polymer.

I left the pail open and it got wet - can I still use it?

Aqua Plastech Dam & Pond Sealer reacts with water and will form lumps. Do not attempt to apply to your dam or pond
unless it is a free flowing powder. You should be able to remove the affected lumps of Aqua Plastech Dam & Pond Sealer
from the top of the pail.

Why is there is a fine layer of powder on the surface of the water after applying Aqua Plastech Dam & Pond Sealer?

Depending on the size of the dam or pond, and often when there is no wind to disturb the surface of the water, the
surface tension of the water causes the fine powder particles of Aqua Plastech Dam & Pond Sealer to rest on the surface
without 'wetting out' fully and sinking. If you find the Aqua Plastech Dam & Pond Sealer powder is forming a 'net' of powder
on the surface, try splashing a little water onto this area to disturb and wet out the powder so it sinks. On small ponds
spraying a fine mist of water from a hose will quickly solve this.

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Our revolutionary sealants will fix most leaking ponds, water features, showers and damp issues.