KingProof C400®
Two-component, acrylic-modified, flexible cementitious waterproofing and protective coating.
SpecWorld has the Spec Pack, CSI specification and drawings for registered specifiers.
- Elongation at break
- > 5% (unbonded)
- Density
- 1,940 kg/m³
Overview
KingProof C400 is a two-component, acrylic-modified cementitious coating applied by brush, roller or trowel to waterproof and resurface concrete, masonry and most other construction substrates. It provides an effective barrier to waterborne salts and atmospheric gases and, once applied, forms a hard-wearing, seamless, waterproof membrane suitable for roofs and foundation protection.
Where to use
- Refacing and evening out variations in concrete surfaces
- Waterproof lining for water-retaining structures
- Coating of seawater channels
- Sealing and coating of tie-bar holes to ensure water tightness
- Foundation protection
- Waterproof coating for wet areas and sunken slabs
- Backing to marble and granite to prevent water ingress and surface staining
- Protection of concrete against carbonation and chloride attack
Why use it
- Protects against carbonation – a 1 mm coating provides anti-carbonation cover equivalent to over 800 mm of concrete
- Waterproof – suitable for internal and external waterproofing
- Excellent adhesion – bonds to porous and non-porous surfaces
- Flexible – accommodates the thermal movement of concrete structures
- Suitable for contact with potable water – can be used to line concrete water tanks
- Vapour permeable – repels water while allowing the concrete to breathe, preventing osmosis
- Compatible with damp surfaces – can be applied to 24-hour-old concrete, giving immediate protection
Technical properties
| Colour | Grey |
|---|---|
| Density | 1,940 kg/m³ |
| Volatile organic compound (VOC) content | 0.5 g/ltr |
| Water-vapour transmission | Sd < 1.5 m |
| Water penetration under pressure | 7 bar – no leakage at 2 mm DFT |
| Chloride-ion diffusion resistance | Not measurable after 24 months of testing |
| Elongation at break | > 5% (unbonded) |
| Coverage | 1.94 kg/m² per 1 mm thickness |
| Recommended thickness | 2 mm DFT |
Standards and approvals
KingProof C400 has been tested for suitability for contact with potable water and for resistance to water penetration under pressure, initial surface absorption and carbonation, in accordance with recognised international test methods.
How to use
Method of use
Surface Preparation
Correct substrate preparation is critical for optimum performance. Surfaces must be structurally sound (direct tensile strength greater than 1.5 MPa), clean and free from laitance, loose particles, oil, grease, old coatings, curing compounds and any other contamination. Mechanical wire brushing may be suitable for small areas. Prior to application, fill holes and irregularities with a suitable KingKrete repair mortar to achieve a smooth, level surface.
Mixing
KingProof C400 is supplied in pre-measured units and should be mixed on site in clean containers. Slowly add the powder component to the liquid component and mix using a slow-speed (300 rpm) drill fitted with a suitable paddle until homogeneous. Mix only as much material as can be used within one hour. Do not apply to dry concrete: saturate the surface with clean water and apply while still damp (saturated surface dry).
Application
Apply using a short, stiff-bristle brush or roller; trowel application may be undertaken where required. For heavy 6 – 10 mm depressions and honeycombing, use less gauging liquid and mix to a stiffer consistency. Where more than one coat is required, apply each subsequent coat after the previous coat has dried; for general resurfacing each coat should be a minimum of 1 mm thick. Spray application is recommended for large areas.
Coverage, packaging and storage
Packaging
KingProof C400 is available in 20 kg double packs, consisting of 5 kg liquid (component A) and 15 kg powder (component B).
Storage
KingProof C400 has a shelf life of 6 months in original, unopened packaging when stored indoors between 5°C and 35°C, out of direct sunlight. Do not allow the material to freeze, as this will render it unusable.
Health and safety
As with all chemical products, avoid contact with the eyes, skin and mouth and use in well-ventilated areas. Treat any splashes to the eyes and skin immediately. For further information, refer to the Safety Data Sheet.