If your concrete water tank is leaking, cracking, or showing signs of deterioration, Mastermix has the solution. Our Multi-Cote waterproof repair system is a non-toxic, cementitious-polymer blend specifically designed for concrete water tank repair in New Zealand. Safe for drinking water tanks, it can be applied internally and externally, and carries a design life of over 50 years when applied correctly.
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Yes. Mastermix Multi-Cote is a non-toxic cementitious repair product that is safe for use in potable (drinking) water tanks. It does not leach chemicals into your water supply.
Small surface cracks can sometimes be repaired by a competent DIYer, but for structural leaks, delamination, or large crack repairs we recommend using a Mastermix Approved Applicator to ensure the repair is done correctly and qualifies for a warranty.
When Mastermix Multi-Cote is applied correctly by an approved applicator, it carries a design life of over 50 years.