Polyurea sealing
for water reservoirs & wastewater.

Polyurea sealing for water reservoirs

Sealing a potable water reservoir is one of the most complex challenges in the coatings industry. The material must be Ministry of Health certified, last decades under water, be taste- and odor-neutral, and cope with concrete movement and varying temperature and pressure conditions.

At Anaf, we’ve specialized in industrial and public reservoir sealing for more than 15 years. Among our completed projects: reservoirs for Mekorot, Mei Carmel Corporation, Israel Airports Authority, Tnuva plants, and dozens of other private and municipal reservoirs nationwide.

Types of reservoirs we handle

• Potable water reservoirs — sealed with NSF/WRAS certified materials
• Irrigation reservoirs — agriculture, parks, gardens
• Wastewater reservoirs — municipal and industrial, acid- and base-resistant
• Fire-suppression reservoirs — special standards for durability and rapid filling
• Saltwater reservoirs — desalination processes, fish farms

What does our sealing system include?

1. Initial survey — concrete condition assessment, mapping of cracks, leaks, and weak points
2. Substrate preparation — UHP cleaning, crack treatment, required concrete repairs
3. Epoxy primer — penetrates the concrete and creates maximum adhesion
4. Two-component polyurea — sprayed with industrial equipment at 2–3 mm thickness
5. Quality testing — layer thickness measurement, adhesion test, flood test
6. Handover and certification — photographic documentation, written warranty, Ministry of Health approval where applicable

Why choose polyurea for reservoir sealing?

Traditional sealing methods (PVC membranes, bitumen, polyurethane cement) suffer from a fundamental structural problem — seams. Over time, the seams open up, water seeps through, and the sealing fails. Polyurea, by contrast, is a single continuous layer with no seam whatsoever, making it the safest, most efficient, and most economical long-term solution.