Water Retaining Structures

Water retaining structures should be treated with extremely hydrophobic and hydrolysis resistant waterproofing systems that would also be suitable for potablity and resistivity to cleaning agents. The waterproofing system should have strong adhesion to substrate, certified for potability and resilient to tank cleaning mechanisms


PORTABLE WATER TANKS

HYPERDESMO®-2K-W HYPERDESMO®-2K-W is a two component, thixotropic, solvent free coating based on high quality elastomeric polyurethane resins, which is certified for using in potable water tanks. With 100% solid content, it produces a strong flexible/elastic membrane completely impermeable by water after polymerisation of liquid membrane. Unlike many conventional coating products there is no need of a protective top coat on this system. Typical Specification HYPERDESMO®-2K-W shall be applied on internal surface over the coat of primer AQUASMART®– DUR.The product shall be certified for potable water (O.T.E.C institute in accordance to the EU guideline 98/83/EC), having excellent chemical and mechanical resistance. The cured membrane shall have tensile strength >20 MPa, adhesion to concrete > 2 MPa and water absorption 0.5%. External Surface Treatment in case of new construction of submerged water tanks: The external surface of the potable water tank shall be treated with AQUASMART® -PB solvent free, seamless PU based waterproofing membrane after a primer coat of AQUASMART®– DUR. The cured membrane shall have minimum 200% elongation property, 4% water absorption and minimum shore A hardness 50. The coating shall be protected by medium duty Dimple sheet before back filling.


SWIMMING POOL

Swimming pools are those water retaining structures that can be subject to both positive and negative water pressure promoting seepage through the concrete structure. Architects, consultants and specifiers usually seek aesthetic as well as comprehensive waterproofing solutions for their swimming pools. Alchimica provides solutions for best performing swimming pools through innovative and advanced waterproofing technologies.
HYPERDESMO® -2K-W HYPERDESMO®-2K-W is a two component, thixotropic, solvent free coating based on high quality elastomeric polyurethane resins, which is certified for using in potable water tanks. With 100% solid content, it produces a strong flexible-elastic membrane completely impermeable by water after polymerisation of liquid membrane. It shall be overcoated by AQUASMART®–TC 2K POOL PROTECT which is a two component, water based, aliphatic coating giving exceptional resistance to chlorine treated water as well as UV resistance in any colour.

SEWAGE/EFFLUENT TANK

HYPERDESMO®-D-2K HYPERDESMO®-D-2K is a two-component, solvent-free pure hydrophobic polyurethane resin, which upon curing forms a strong membrane of moderate elasticity with outstanding adhesion to the substrate. The excellent abrasion and chemical resistance properties of HYPERDESMO®-D-2K makes it resilient to aggressive environments and so the most suitable and certified for sewage & effluent tanks. PORTABLE WATER TANKS Typical Specification HYPERDESMO®-D-2K shall be applied in the internal surface over a primer coat of AQUASMART®-DUR and no further protective layer is required. The cured membrane shall have hardness >60 Shore D, tensile strength >30 MPa and adhesion to concrete >4 MPa. The product shall be CE certified for expected 25 years’ service life. External Surface Treatment in case of new construction of submerged Sewage/Effluent tanks: The external surface of the Sewage/Effluent shall be treated with AQUASMART®-PB solvent free, seamless PU based waterproofing membrane after a primer coat of AQUASMART®-DUR. The cured membrane shall have minimum 200% elongation property, < 4% water absorption and minimum shore A hardness 50. The coating shall be protected by medium duty Dimple sheet before back filling.

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