- High-Pressure Waterproof Strength: HydroCoat 103 2K is a high-performance cementitious coating designed as a cementitious waterproofing membrane for extreme conditions. The rapid airless spray application forms a hard, durable barrier on concrete and steel substrates.
- Rapid Application, Chemical Resistance: HydroCoat 103 2K supports fast balcony waterproofing, podium deck waterproofing, and car park waterproofing. Consequently, installers achieve high output rates while protecting structures exposed to sulphate-contaminated ground.
- Durable Protection, Extended Service Life: The coating resists acids, moisture, and chlorides. Therefore, it protects reinforced concrete in water tank waterproofing, lift pit waterproofing, and aggressive coastal or highway environments.
High Performance Cementitious Coating – Technical Overview
Applied to prepared concrete, HydroCoat 103 2K delivers reliable below-ground waterproofing under extreme positive and negative water pressure. As a result, it suits reservoirs, tanks, basements, and earth-retained structures requiring long-term durability. The coating applies efficiently to damp substrates and supports year-round installation. It maintains performance in cold conditions and delivers consistent results on complex detailing and large concrete areas across demanding sites.
The two-component cementitious formulation cures to form a hard, highly alkaline coating. HydroCoat 103 2K will also maintain its waterproofing integrity as it resists up to 10 bar positive and negative water pressure.
The dense cementitious structure provides very high diffusion resistance to carbon dioxide gas and chloride ions. As a result, the coating delivers protection equivalent to substantial concrete cover. Use HydroCoat 912-RT to reinforce static joints and structural details and improve performance at changes of direction and construction interfaces.
This cementitious waterproofing membrane supports balcony waterproofing, podium deck waterproofing, car park waterproofing, lift pit waterproofing, and water tank waterproofing. It also protects concrete structures exposed to aggressive ground conditions and long-term chemical attack.
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HydroCoat 103 2K
Key Benefits
Key Benefits
- Very waterproof – Resistant to 10 bar positive and negative pressure.
- Quick application in one coat to horizontal surfaces.
- Non-toxic when cured.
- Sprayable – Up to 2 m2 per minute is possible.
- Hard, durable and UV-stable trafficable finish.
- All year round application to a damp substrate.
- Can be applied at temperatures as low as 5°C.
- Very low VOC content.
- Very high diffusion resistance to carbon dioxide gas and chloride ions; equivalent to 100 mm of concrete cover.
- Excellent adhesion to sound prepared concrete substrates and steel.
- Thixotropic – can be applied at 1 mm to vertical surfaces.
- High build coating of 2 mm eliminates the incidence of small defects seen within thinner membranes.
Typical Waterproofing Applications
Typical Waterproofing Applications
- Podium decks, balconies and car parking areas.
- Concrete water-retaining structures such as water tanks and reservoirs.
- Concrete earth-retaining foundation walls to both the positive and negative sides.
- Internal concrete surfaces of walls and rafts or slabs to earth-retained structures such as habitable basements, car parks, plant rooms and lift-pits.
- Concrete temporary lay-down and working areas.
Technical Data
Technical Data
| Cured Performance | Result |
| Colour | Grey |
| Membrane thickness in one or two coats | 2.0 mm |
| Adhesion to concrete | >2 MPa |
| Tensile strength | >2.5 MPa |
| Elongation | 3 to 5% |
| Compressive strength – 1 day | >10 MPa |
| Compressive strength – 7 days | >30 MPa |
| Compressive strength – 28 days | >40 MPa |
| Hardness (28 days) | >75 Shore D |
| Water vapour resistance – SD value | 0.91 m |
| Water vapour resistance – μ value | 455 μ |
| Water vapour resistance | 4.55 MNs/g |
| Water resistance – Positive & Negative | 10 Bar |
| Reaction to fire classification | A2-s1 |
| Biological resistance | DWI regulation 31 approved |
| Thermal compatibility | >2 MPa |
| UV resistance – stable but will discolour | 50 Years |
| pH | 12-14 |
FAQ
FAQ
What is HydroCoat 103 2K?
HydroCoat 103 2K is a high-performance, two-component cementitious waterproofing membrane designed for extreme water pressure and aggressive environments.
Where should HydroCoat 103 2K be used?
The system suits balconies, podium decks, car parks, water tanks, lift pits, basements, and earth-retained concrete structures.
How much water pressure can HydroCoat 103 2K resist?
HydroCoat 103 2K resists up to 10 bar of positive and negative water pressure when correctly applied.
Can HydroCoat 103 2K be applied by spray?
Yes. Installers can apply HydroCoat 103 2K by airless spray, achieving fast application rates on large concrete areas.
Is HydroCoat 103 2K suitable for damp substrates?
Yes. The coating applies reliably to damp concrete substrates and supports year-round installation.
How does HydroCoat 103 2K protect reinforced concrete?
The dense cementitious matrix resists moisture, acids, and chlorides, helping protect reinforced concrete from corrosion and deterioration.
Does HydroCoat 103 2K require joint reinforcement?
Yes. Newton recommends reinforcing static joints and changes of direction using HydroCoat 912-RT to improve detailing performance.
How does HydroCoat 103 2K differ from tanking slurry?
HydroCoat 103 2K provides higher pressure resistance, enhanced chemical protection, and spray application compared with traditional tanking slurries.
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