Cementitious Waterproofing

Monneli Cemcoat FX2

Two Part Elastomeric Cementitious Waterproofing Coating

Waterproofing walls made of concrete, limestone, porous concrete and brickwork
Waterproofing of monolithic water tanks and rain water retention basins, pools canals
Waterproofing coating for roofs, domes, tunnels, spillways, precast slabs and other wet areas
Waterproofing bathrooms, showers, balconies, terraces, swimming pools etc. before laying ceramic tiles
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Technical Information
Product Description

CEMCOAT FX2 is a two part acrylic modified cementitious coating. It is composed of special types of cement, fillers (powder), and a copolymeric acrylic
blend with chemical additives (liquid). Once mixed, CEMCOAT FX2 produces a tough flexible waterproofing membrane which bonds to most
concrete or masonry substrates and protects against possible ingress of water and waterborne chemicals.

  • Polymer modified, therefore reduces permeability
    while increasing bond, flexure and tensile
  • Withstands negative and positive water pressure
  • Elastomeric, can bridge cracks up to 1.5 mm
  • Resistant against Chloride and Sulphate ion attack
  • Breathable, whilst repelling water it allows substrate to breath
  • Good adhesion, bonds to porous and non-porous substrate
  • Non-toxic, can be used for potable water tanks
  • For interior or exterior use, old and new surfaces
  • Can be applied to 24 hours old concrete, thereby giving immediate protection to concrete.
Compiliance Standard
  • ASTM D 412
  • ASTM C 836:95
  • ASTM D 4541
  • DIN 1048
  • BS EN 12390
  • ASTM 543
Packaging, Coverage / Consumption

CEMCOAT FX2 is supplied in 20kg Pack (Part A – 10 kg powder, Part B – 10 liter liquid).

Consumption: 1.8 kg/m² per1 mm thick coat depending on surface conditions.

Shelf Life & Storage

Keep the product in dry place and its original containers. Shelf life is 12 months from the date of production if stored properly.

Technical Properties
Component A: Appearance / Density

Powder / 1.45 kg/L 

Component B: Appearance / Density

Liquid / 1.0 kg/L

Density at 25°C

1.8 kg/L

Elongation (ASTM D412)


Tensile Adhesion strength (ASTM D412)

>  2.0 N / mm²

Crack bridging ability (ASTM C1305)

>  2.0 mm

Resistance to Hydrostatic Pressure at 1.5 bar (BS EN 14891)


C02 Diffusion Resistance

R > 357 m
Sc > 89 cm ( 1 mm dft)
Sc – equivalent concrete

Chloride Ion Diffusivity

Zero penetration at 90 days

Chloride Ion diffusion Coefficient

1.04 x 10-7 cm² /s

Water vapour transmission

< 25 gm / m² / 24 hrs.

Resistance to following chemicals

Waste water, Diesel, Kerosene, Engine oil, Hydraulic oil, Methyl Alcohol, Ethyl Alcohol

Pot life at 25ºC

45 minutes

Initial Curing

4-5 hours

Curing Period

96 hours

Application Information
Instructions for use

Crack treatment

Shrinkages and non-moving structural cracks less than 0.3mm shall be filled with a pre-treatment strip of CEMCOAT FX2 directly bridging over the crack.

Static cracks that are greater than 0.3mm shall be repaired by chiselling the crack into a V-shape, to a depth and width of 25mm and priming it with PRIMERA18 followed by the application of Colmef cementitious repair material.

Voids and honeycombs shall be patched with BETOFINISH C, a single component polymer modified fairing coat, allowing the area to cure before applying
the membrane.

Right angle bends

All right angle bends must have a coving detail installed. In areas where parapet walls, columns, pipe penetrations are present, a 45° coving fillet shall be made at all corners using BETOCEM FIBER, a Fiber reinforced shrinkage controlled mortar for concrete repair to the water saturated cured surface.

All other angles, joints, protrusions and stress joints should be pre-treated with a heavy application of CEMCOAT FX2 extending 150mm on both sides of
the coving.

Movement Joints

Expansion and movement joints should be sealed with ELASTOSEAL PU, a Polyurethane sealant. Allow to cure before the application of CEMCOAT FX2.


Highly porous concrete or concrete containing microsilica will require priming with PRIMER A18, a synthetic high penetrating primer.

The primer shall be applied at a rate of 5-6m²/L and left to achieve a tack-free condition before applying the top coat. A second coat of primer may be
required if the substrate is excessively porous.


CEMCOAT FX2 shall be mixed with liquid at a low speed drill and will be allowed to set for 5 minutes after mixing. Remix the product again shortly before

The waterproofing slurry shall be applied onto the dampened surface by a brush in 3 coats at a rate of 1.7Kg/m² to achieve a minimum dry film thickness of 1.0 mm for each coat. The three coats must be applied at right angles to one another with a 6-8 hour intervals between each application at 25°C.

The total dry film thickness shall not be less than 3mm and shall be used for positive pressure waterproofing and will be capable of forming a flexible waterproofing layer resistant to the aggression of chemicals, Chlorides and Sulphates.

The powder should always be added to the liquid. Remixing and re-tempering shall not be permitted.

On substrates that are exposed to movements and deformation or where cracks are expected, reinforcing glass fibre mesh shall be spread into the first coat of CEMCOAT FX2 before applying adhesives. Tiling or finished floor installations should be carried out as soon as possible after full cure of membrane is established.

Curing and Protection

Surfaces treated with CEMCOAT must be kept damp and must be protected from the drying action of direct sunlight for a minimum period of 3 days after
application. Protect all treated surfaces from wind and frost, by covering with plastic sheeting, damp hessian or equivalent.


All tools should be cleaned with water immediately after use. Cured material can only be removed mechanically.


  • Store the components of CEMCOAT FX2 out of direct sunlight before mixing during hot weather
  • After application, use sheets to protect the drying surface from the rapid


Surface Preparation

The surface of the concrete shall be sound, clean and uncontaminated.

This preparation shall be such as to leave a sound exposed concrete surface free from dust, loose particles and any deleterious matter. If the concrete surface is defective or has laitance, it must be cut back to a sound base.

Moss and lichen must be removed physically followed by treatment with fungicidal wash. After treatment, it must be washed down thoroughly with clean water.
In addition, make sure that all surfaces must be damp but not totally wet before progressing the work.

Additional Information
Health & Safety

While CEMCOAT FX2 is non-toxic, skin and eye contact should be avoided.

Use gloves, protective creams and goggles to avoid the contact with eyes and skin.

In case of skin contact clean immediately with a resin removing cream, followed by soap and water. In case of contact with eyes, use clean water to wash the eyes and seek doctor medical attention immediately.

Important note

The information in this Technical Data Sheet is based on Colmef Monneli’s experience. Colmef Monneli does not accept any liability arising from the use of its products as it has no direct or continuous control over where or how its products are applied. All Colmef Monneli’s Data Sheets are updates on regular basis. It is the user’s responsibility to obtain the latest version.

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