Polymer Modified Elastomeric Cementitious Waterproofing Coating
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.
Packaging:
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.
Storage:
Keep the product in dry place and its original containers.
Shelf life:
12 months from the date of production if stored properly.
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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.
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 PU25, a Polyurethane sealant. Allow to cure before the application of CEMCOAT FX2.
Priming
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.
Application
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 application.
It is recommended that the waterproofing slurry shall be applied onto the dampened surface by a brush at a rate of 1.8 Kg/m2 to achieve a minimum of dry film thickness of 1.0mm (usually achieved in two coats). Coating 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.
Cleaning
All tools should be cleaned with water immediately after use. Cured material can only be removed mechanically.
Recommendations
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.
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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