DamIt™ Dam Sealer

Now: $349.00
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Note: If you don't see the pricing above in your preferred currency, please select it at the top of this page. When purchasing, the price will be shown in Australian Dollars on the checkout page, however you will be charged at the conversion rate to your currency as at the time of your purchase.

How much do I need?

If you're not sure how much DamIt you need for your dam or pond. Please scroll down and use our area calculator to estimate the size you need to order.

Calculated at Checkout



Do you have a problem with a leaking Dam or Pond?

  • Fix your leaking dam with DamIt
  • Apply directly to the water surface
  • No need to drain water or empty the dam
  • No need for expensive earth moving equipment
  • Fix it yourself as DamIt creates a permanent seal

DamIt™ Dam Sealer is an advanced, non-toxic, polymer powder which can be used to seal leaking dams and ponds. The polymer is applied to a leaking dam or pond by scattering the powder across the surface of the water.


DamIt™ Dam Sealer is designed with a positive charge which draws it downward through the water toward the bottom of the dam or pond. The water pressure (hydrostatic pressure), which causes the dam or pond to leak, forces the polymer down into cracks and crevices as it sinks to the bottom of the pond or dam.


Once activated with water, the polymer will expand in size and bind to other polymer particles to form larger groups of particles, which effectively slows and stops the leak. The polymer will continue to expand over several hours and forms a flexible plug that withstands water pressure.


The positive charge of the particles will also attract any silt and suspended matter in the water downward to the bottom, which acts to embed the polymer within the soil structure and minimise any disturbance or movement of the polymer that may be caused by future water inflows.


DamIt™ Dam Sealer is insoluble and will form a long-term plug, in cracks and porous soils. The polymer stays active when wet and can withstand continuous wet/dry cycles to accommodate rising and falling water levels due to seasonal water level variations in the dam or pond.


DamIt™ Dam Sealer is a rapid, cost effective solution for sealing water leaks and does not require earthmoving equipment or the emptying of dams and ponds; allowing you to save valuable water and keep the dam or pond in use while repairs are undertaken.


DamIt™ Dam Sealer works on a wide range of soil types; from clays to sandy loams and in a wide range of water types; from clear, pure drinking water through to saline water with high levels of suspended clays typically found in rural stock dams.


The polymer is approved for use with potable water and is not toxic to humans, fish, aquatic plants or animals.


DamIt™ Dam Sealer will eventually break down to form a harmless mix of water and carbon dioxide over time.

DamIt™ Dam Sealer is applied over the surface of the dam/pond at a rate of 1 litre of DamIt™ Dam Sealer powder per 10 square meters (or 107 square feet) of dam.


If you have obvious signs of the leak (e.g. wet walls or water trickling out of ground), or you feel you know the general area causing the leak then DamIt™ Dam Sealer can be applied just to those areas of the dam/pond and a smaller amount of DamIt™ Dam Sealer will be required.


Allow 1 x 15ltr pail per 150m2 (1600 sq ft) of surface area.


One application is normally sufficient to stop leaks permanently.

Once applied to the water surface in the dam or pond, the granules of DamIt™ Dam Sealer will slowly settle on the bottom of the dam and be drawn into the cracks and crevices where water leakage is occurring.

DamIt™ Dam Sealer will then expand into these areas and bond with the soil and clay to form a barrier and plug the leaks, effectively stopping any further water loss.

To calculate how much DamIt you need for your pond or Dam, use one of the calculator options below. 


Simply enter either the diameter or length by width of your dam and the calculator will show the approximate size and quantity of DamIt you need.

Please select Meters or Feet for your entry.

Diameter - Round Area
Diameter ()
Length by Width Area
Length ()
Width ()

Every dam and pond is a different shape, so it is only necessary to get an approximate measurement of the surface area of your dam. You can do this by either taking an estimate of the diameter of your dam as shown below, or the length and width.


It is recommended to allow for more area than you need rather than not enough. If you're still not sure about how much you need, please contact us for assistance.



Rural and Farm Dams
Garden or Park Ponds
Golf Courses
Levee Banks
Irrigation channels
Storm-water Channels
Artificial Wetlands
Storage Reservoirs
Water Features
Tailings Dams *


* Not suitable for highly acidic or alkaline tailings



Converting Square feet to Square metres for estimating the amount of DamIt™ Dam Sealer Required.


If you don't know your dam surface area in square meters; the coverage rate for DamIt™ Dam Sealer is 1L : 107ft² or a 15L bucket will be enough to treat an area of 1615ft².


If your dam is circular measure the distance across (diameter) and use the following formula to calculate area - 0.785 x Diameter x Diameter. Eg distance across dam is 10 meters, area is 0.785 x 10 x 10 = 78.5m².


We're always happy to assist in calculating the amount required. If you aren't sure or have a difficult shape please use the Contact Us page and send details of your project.



Damit is not suitable for the following applications

  • Ponds made from fibreglass, plastic, rock or concrete - Damit is designed for earthen ponds only
  • Ponds with rubber or PE liners - Damit may work if you have a layer of clay/silt over the liner, but ideally Damit needs to be able to freely percolate into the soil
  • Small and/or shallow ponds - Damit expands significantly after application
  • Streams, water features or moving water - Damit is designed for still ponds and dams
  • Heavily planted ornamental ponds with reeds and grasses - Damit will attach to vegetation
  • Fish or aquaculture ponds - Damit is not toxic to fish but care should be taken to apply Damit in stages where fish are present to minimise any impact

Note: Damit will reduce soil porosity but it is not a cure-all and we cannot guarantee use of this product will stop your leaks

For more information on using DamIt™ Dam Sealer, please visit our FAQ page.


We have received a lot of email enquiries and have taken most of the questions and answers and put them on a separate page.


If your question hasn't been answered there, please feel free to Contact Us.


The more information you can provide to us, about your requirements, the better we can answer you.


One application is normally sufficient however difficult projects may require follow up application


Normally applied at 1Ltr/10m² of dam/pond surface area. For high salinity increased dosage rates are required. 


Activation Time: 0-2 hours

Fully Activated: 4-7 days

Expected Life In Soil: 5 years +

Shelf Life: 5 years in a dry sealed container

Store Between: 0°C – 50°C

Application Temperature: Water temps above 5°C


Clean Up
Sweep up spills of dry DamIt™ Dam Sealer or, if wet hose off with large amounts of water

DamIt™ Dam Sealer becomes very slippery when wet. The use of gloves is suggested when hand spreading to keep DamIt™ Dam Sealer dry until ready for use.


The container must be well sealed in high humidity to stop absorption of moisture, by the polymer, prior to use.


Discard any polymer powder which has been wet, forms lumps, or a slippery gel consistency.

DamIt Dam Sealer

The Results Are In! 

Shalex DamIt™ Dam Sealer

Wet Method Application

Shalex DamIt™ Dam Sealer
Dry Method Application





Customers are advised to consider the information in this data sheet in the context of how the product will be used, including surfaces and any other products used. The information provided in this data sheet represents our best scientific and practical knowledge. Any advice, information or assistance provided by Shalex in relation to its products is given in good faith, however is provided without liability or responsibility. Due to the wide variety of site conditions we are unable to assume liability for any loss that may arise from the use of our products. The user is responsible for checking the suitability of products for their intended use.

Shipping Information

DamIt™ Dam Sealer is a Flexible non-toxic polymer and is classified as a non-dangerous good for transportation. We can ship this product to most areas via our couriers. Add this product to your cart and use the estimate shipping and tax feature to view shipping charges to your location. If you live in a remote location, please contact us for freight details.

Additional Details

Shipping Information:
You can check shipping costs for this product by adding the size and qty to the shopping cart then use the estimate shipping and tax feature in the shopping cart