KingProof C75M®
Two-component, polymer-modified, flexible cementitious waterproofing and protective slurry mortar.
SpecWorld has the Spec Pack, CSI specification and drawings for registered specifiers.
Overview
KingProof C75M is a two-component, polymer-modified cementitious waterproofing and protective slurry mortar for concrete. It is slightly flexible, allowing it to tolerate fine cracks, and is suitable for both interior and exterior applications. It can be mixed to a slurry or a trowelable consistency and is available in concrete grey and off-white.
Where to use
- Improving the watertightness of water tanks, reservoirs and clearwells
- Waterproofing of potable-water tanks, reservoirs and clearwells
- Internal and external waterproofing and damp-proofing of concrete, mortar, blockwork and brickwork
- Protection of concrete against de-icing salts and freeze/thaw cycles
- Sealing of hairline cracks in concrete not subject to movement
- Interior and exterior waterproofing of basements
- Horizontal surfaces subject to light foot traffic, such as balconies
Why use it
- Improves the watertightness of water-containing concrete structures
- Protects against water penetration while remaining vapour permeable (breathable)
- Excellent freeze/thaw resistance
- Good adhesion to sound, prepared substrates
- Easy and fast mixing and application
- Good abrasion resistance
- Protects against concrete carbonation – a 2 mm coating is equivalent to approximately 150 mm of concrete
- Can be mixed to a slurry or a trowelable consistency
- Suitable for contact with potable water
Technical properties
| Colour | Concrete grey and off-white |
|---|---|
| Mixing ratio (A : B), slurry consistency | 1 : 4.1 by weight (full unit) |
| Application temperature | 5 to 35°C |
| Damp-proofing | 1 coat at 1 mm |
| Waterproofing | 2 coats at 1 mm per coat |
| Coverage | 2 kg/m² per 1 mm thickness |
| Anti-carbonation equivalence | 2 mm ≈ 150 mm of concrete |
| Data measured at | 23°C & 50% RH |
Standards and approvals
KingProof C75M has been certified as suitable for contact with potable water and tested for resistance to carbonation and freeze/thaw cycling in accordance with recognised international test methods.
How to use
Method of use
Surface Preparation
Substrates must be structurally sound, clean and free from laitance, loose particles, oil, grease, curing compounds and any other contamination. Fill holes and honeycombing with a suitable KingKrete repair mortar. Do not apply to dry concrete: saturate the surface with clean water and apply while still damp (saturated surface dry).
Mixing
KingProof C75M is supplied in pre-measured units. Slowly add the powder (component B) to the liquid (component A) and mix with a slow-speed (300 rpm) drill and paddle until a lump-free, homogeneous mix is achieved. Mix only as much material as can be used within one hour.
Application
For damp-proofing, apply one coat at 1 mm. For waterproofing, apply two coats at 1 mm per coat, applying the second coat once the first has set sufficiently to take the next. Areas of extremely high water infiltration may require a third coat. Apply by brush for slurry consistency or by trowel for a trowelable consistency.
Coverage, packaging and storage
Packaging
KingProof C75M is available as a 20 kg unit comprising liquid (component A) and powder (component B), which when mixed yields approximately 10 litres.
Storage
KingProof C75M has a shelf life of 12 months in original, unopened packaging. Protect component A from freezing and component B from moisture. Store dry between 4°C and 35°C, and condition the material to 18 – 24°C before use.
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.