Leak-Stop™ is a scientifically formulated eco-friendly sealer for concrete dams and reservoirs.







Our product is an intelligent pulvil (Heavy eco-friendly dust) combination of minerals designed to seal/waterproof leaks by scavenging as well as plugging actions.
Cast small amounts of the Leak-Stop™ into the body of water, around the edges as well centre, so the particles are drawn down into the cracks and seepages.
This process of our unique technology creates a highly effective, eco-friendly seal.
Use up to 80% less Leak-Stop™ than with similar products.
Leak-Stop™ is a natural, non-toxic product that is safe for people, fish, birds, livestock as well as wildlife.
Our eco-friendly sealer for concrete dams and reservoirs is waterproof, UV stable and also impact resistant.


Leak-Stop™ is drawn into and fills small holes, cracks as well as seepages through pressure and suction.

Large concrete irrigation reservoirs as well as gravity dams.
Livestock / game drinking water reservoirs and also troughs.
Rock pools, ponds, fish tanks as well as water tanks.
Our product is also suitable for concrete diversion dams.
You can use Leak-Stop™ in earth dams as well as lakes.







Fill the dam or reservoir as full as possible.
Close all valves and switch off all pumps as well as machinery.

Cast 500g of Leak-Stop™ per 2M2 onto the water, around the edges as well as in the middle.
Allow the product to work for at least 12 hours or until the water clears before using the dam or reservoir.

Leak-Stop™ is available in 500g, 1KG, 8KG as well as 20KG packs.
With nationwide delivery, you can also have Leak-Stop™ delivered to your door!!
ECO-FRIENDLY SEALER FOR CONCREE DAMS AND RESERVOIRS

ABOUT US
Cosmo-Dec Everlasting Coatings originated in 1991, with a single product – Therma-Masta™.
Knowledge gained from manufacturing this complex and unique product allowed us to formulate new and innovative products such as Fire-Guard™, Aqua-Mite™, Aqua-Therm™ and also Clean-Air for specialty applications.
To-day, 3 decades on we manufacture more than 80 different types of construction chemicals out of our factory in Pretoria, Gauteng.