CEMPROOF 4, a rich blend of both powder and liquid polymers with added cements and inert fillers which when mixed produces a creamy slurry with excellent adhesion, cohesion and waterproofing properties.


Water Absorption (%) (ASTM C413):  < 1.0
Modulus of Elasticity (n/mm²): ± 20,000
Adhesive Strength to concrete (n/mm²): > 1.5
Compressive Strength @ 28 days: > 35
Effective full cure (days): 7 days
Application temperature range (ºC): 10 – 40
Mixed Density (Kg/Ltr): 2.1
Pot Life @ 30ºC (mins): 60
Overcoat (hours): 2 – 6 hrs
Foot Traffic (hours): 12 hrs
Colour: Grey


  • Good flexibility
  • Excellent adhesion to sound substrates
  • Impermeable
  • Frost & de-icing agent resistant
  • Breathable
  • Anti-carbonation
  • Easy to apply
  • Long pot life & fast drying


  • Bathrooms, toilets and kitchens
  • Water retaining structures
  • Swimming pools and fountains
  • Impervious bedding beneath tiles
  • Protective coating
  • Balconies
  • Culverts and tunnels
  •  Crack sealer
  •   R.C. gutters

12 months in unopened condition, stored in dry ambient temperatures.

The proprietary waterproofing system shall consist of 2 coats of CEMPROOF 4 cementitious slurry at 1.0 Kg/M² per coat, apply to the concrete slab/wall and carried out in accordance with the manufacturer’s instruction and recommendations.

PART (A) – 20 kg
PART (B) – 5kg


Surfaces to be applied with CEMPROOF 4 should be sound, clean and free from all dirt, loose particles, paint films, protective coatings, oil and grease, laitance etc.

All cracks and honeycombs shall be repaired prior to the waterproofing work.

All points between the vertical and horizontal shall have an angle fillet formed with a non-cracking material such as a blend of cement/sand (1:3) with LAT-BOND mixed to a trowellable consistency. Surface should be roughened and primed prior to application.

Pour the liquid contents (Part B) into a suitable sized pail and then slowly add the powder (Part A) while continually mixing with a slow speed (500 rpm) drill and paddle. Continue mixing until a homogeneous, lump free mix is obtained.

Surfaces to be applied with CEMPROOF 4 shall be saturated with clean water prior to application. Care should be taken to avoid puddling.   Extremely porous surfaces should be sealed with LAT-BOND.

The first coat of mixed CEMPROOF 4 should be applied at the rate of 1.0 Kg per M² by either brush, roller or spray and allowed to cure prior to the application of the second coat.

The second coat of mixed CEMPROOF 4 should be applied t the rate of 1.0 Kg per M² at right angles to the first coat.

The uncured waterproofing coating should be protected from inclement weather and subsequently from physical damage while exposed.

CEMPROOF 4 contains cement which is highly alkaline and may cause irritation of the skin. Operators are advised to wear protective clothing and gloves during use. Mixing should be carried out in a well ventilated area and in common with all powder products in order to avoid raising and inhaling of dust. If the powder enters the eye, wash thoroughly with copious amounts of fresh clean water. If discomfort continues, please seek for medical advice.

Note: Information in this data sheet is, to the best of our knowledge. However, we have no control over the method of application and the amount of care taken when using this product and therefore, the liability of NCL Chemical & Equipment is limited to the quality of the delivered material.