Sealing a water cistern typically involves thorough cleaning and the application of a suitable waterproofing coating to ensure it remains watertight and prevents contamination. The process outlined below details a common approach, including preparation and application steps, utilizing products designed for this purpose.
Steps to Seal Your Water Cistern
Proper preparation is crucial before applying any sealant. The process involves several key stages, from initial cleaning to the final application of the sealing material.
Here is a step-by-step guide based on standard practices for cistern sealing:
- Clean Out the Cistern: The first and essential step is to thoroughly clean out the cistern. This involves removing any standing water, debris, or sediment accumulated inside.
- Set Aside Rainwater Supply: It is necessary to manage the rainwater supply entering the cistern during the sealing process. This might involve diverting the flow temporarily or ensuring the cistern is empty and isolated.
- Finish Pumping Out the Tank: Ensure all water has been completely pumped out of the cistern or tank before proceeding. A dry surface is vital for the sealant to adhere properly.
- Lightly Pressure Wash Cistern Walls: After removing bulk debris and water, lightly pressure wash the interior walls of the cistern. This helps to remove any remaining dirt, grime, or loose particles, preparing the surface for the sealant.
- Remove Bottom Sludge: Pay close attention to the bottom of the cistern. Any remaining sludge or fine sediment must be completely removed to ensure a clean, stable surface for the coating application.
- Apply First Coat of MasterSeal 581: Once the cistern is clean, dry, and properly prepared, apply the first coat of a suitable waterproofing sealant, such as MasterSeal 581. Apply the coating evenly according to the manufacturer's instructions, ensuring complete coverage of the walls and floor.
- Apply Second Coat of MasterSeal 581: After the recommended drying or curing time for the first coat has passed, apply a second coat of the sealant (e.g., MasterSeal 581). A second coat provides an extra layer of protection, fills any potential pinholes, and ensures a durable, watertight seal.
Following these steps helps create a sealed interior surface within the cistern, protecting the stored water and maintaining the structural integrity of the tank. Always consult the specific product instructions for curing times and safety precautions.
