DamIt™ Dam Sealer

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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. The polymer is approved for use with potable water and it 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 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.

One application is normally sufficient to stop leaks permanently.

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 of surface area.

Detailed Project Instructions, Application Guide and SDS are available by clicking here.



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DamIt™ Dam Sealer - Frequently Asked Questions

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.


  • Rural and Farm Dams
  • Garden or Park Ponds
  • Golf Courses
  • Levee Banks
  • Irrigation channels/ponds
  • 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™ 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.


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



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.

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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. For our International customers experiencing payment issues using credit card - If your card payment fails, there may be an issue with cross-border payments. The easiest way to fix this is by choosing PayPal as your payment method. PayPal will allow you to process your credit card payment in your local currency. Should you payment issues continue, please contact your financial institution.

Additional Details

Shipping Information:
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