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Fosroc HydroProof Xtra
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Last Updated
16 Apr 2020
Country Origin
Minimum Order
1 Pail

Specification of

Single component acrylic polymer for cement based waterproof composite coating



Provides an effective and economical method of waterproofi ng

to concrete and masonry surfaces, by mixing with cement and

application by brush.


 Non - toxic, non-fl ammable and user friendly

 Provides a tough, impermeable waterproof membrane

 Can be applied by brush, on horizontal and vertical surfaces

 Excellent adhesion to concrete and masonry surfaces

 Protects concrete and mortar from natural elements such

as wind, rain, sunlight

 Breathable - allows inside water vapour to escape


Hydroproof Xtra is formulated to be mixed with cement on site

or simply brush applied over concrete or masonry surfaces to

provide an effective waterproof membrane.

Technical support

Fosroc provides a technical advisory service supported by a

team of specialists in the fi eld.

Areas of application

Below sloping screed or waterproof plaster on :

 Roofs, terraces and balconies as a sandwich layer

 Pools and fountains

 Reservoirs and channels

 End walls subjected to rain


Water absorption : 1% maximum

Pot life at 300C : 30 min.

Application temperature : Not less than 100C

Toxicity : Non-toxic

Bond strength to concrete : Approx. 1 N/mm2

Application instructions


All surfaces to be treated with Hydroproof Xtra must be thoroughly cleaned by a wire brush or other mechanical means, to

remove all dust, laitence or debris. The surface must also be

free from oil, grease, wax or any other form of foreign matter

which might affect adhesion. Spalled and deeply disintegrated

concrete or mortar must be removed to a sound substrate and

repaired suitably before coating.

Hydroproof Xtra


Before application, the surface should be primed with Hydroproof Xtra as follows:

1 part of Hydroproof Xtra : 2 parts of Water : 4 parts of Cement

Mixed material with the above proportion will cover an area of


 for 1L of Hydroproof Xtra.


Hydroproof Xtra acrylic polymer shall be mixed with neat cement in the ratio of 1:2 respectively, to obtain a uniform and

consistent slurry avoiding any lump formation. This can be

achieved with a low duty, low speed drilling machine attached

with a mixing paddle. Do not mix for more than 2 minutes. Do

not mix more material than which can be used within the pot

life. Retempering the mix with water should not be done. Occassionally stirr the material till the entire quantity is applied, so

that solids do not settle at the bottom of the container.

Mixing Ratio

Hydroproof Xtra liquid Neat cement

0.5L 1 kg

 1L 2kg

 5L 10 kg

 20L 40 kg

For white colour - mix white cement, for other colours, add

cement compatible pigments to white cement.


For best results, wet the surface before coating. Apply the mix

with a short, stiff bristle brush like a paint to an approximate

thickness of 1 to 2mm. During the fi rst 12 hours of curing,

Hydroproof Xtra surface must be protected from abrasion, rain

or other adverse conditions. No traffi c shall be allowed within

48 hours after application.

Normally 2 coats of application of Hydroproof Xtra are recommended. First coat should be allowed to air dry for 5 - 6 hours.

After application of the fi nal coat, initial air drying shall be allowed for 2 to 6 hours. During this period water should not be

used for curing. Moist curing should be done for the next 24

hours by spraying water on Hydroproof Xtra coating. Following

moist curing, Hydroproof Xtra should be allowed to dry for three

days before subjecting it to submersion in water. 

Untuk keterangan lebih lanjut, silahkan download PDF ini :



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