Waterproof underlay

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Product shipped in 48h

Our waterproof underlay is a resin-sealing non-circulatory and collectible, resin-based liquid in the aqueous phase of a green color and load granular that forms after drying an adherent membrane, flexible, waterproof and resistant to cracking.

Ideal in new or in renovation for the realization of a tight seal before recovery.


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Harmony waterproof under-sealer is a waterproof primer made of resin and granules.

Due to its nature this primer forms, after drying, an adhesive, flexible, waterproof and crack-resistant membrane.

Harmony waterproof under-sealer 'is particularly suitable in bathrooms, for Italian showers, terraces, balconies and gardens.

The product can be applied to many common building materials such as bricks, gypsum boards, plasterboard –hydrugated or not, wood pnales, agglomerated wood, stone, concrete, etc.


Type: Resin granules mixture

Colours: light green

Packaging: 5kg

Dosage: 1kg = 2m2 (in two layers).

Storage: 12 months in unopened original packaging, stored in a dry and frost-free location.

Guarantee: Manufacturer’s liability

Tools & Cleaning

Paint roller, brush, gloves, protection goggles.

Clean tools in water after use.


The base surface must be resistant, sound, solid, clean, dry and free of humidity.

If the subsurface has been relocated, you must wait at least 28 days before you can work on it.


Apply Harmony waterproof under-sealer in 2 coats with the brush, or the paint roller.

Dosage per coat: 250g / m2.

Drying time between layers: 30 - 90 minutes.

Subsequently, this waterproof resin primer can be covered with concrete, tiles, any kind of stone-floors, cement screed, felt, gravel, etc.

For angles and corners, use the Harmony Angle Kit, which consists of a silver and epoxy resin.

We recommend to apply the silver already between the first and the second layer of the waterproof resin primer.



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  • Shipped within 48 hours After reception of payment. . Period for carriage between 2 and 4 days

  • Delivery to the following countries
    France, Belgium, Luxembourg, Germany, Austria, Poland.

  • For Corsica, the DOM/TOM and other destinations in Europe, please contact us so that we can assess the shipping costs

Customer Service

You can contact us

  • via chat : at the bottom right

  • via telephone : 04 42 20 10 09
    from Monday to Wednesday from 8:00 a.m. to 8:00 p.m.
    from Tuesday to Friday from 8:00 a.m. to 12:00 a.m.

  • via email : At the following address


Capacity 5 kg
Compliant NF P 74-201-1
Conservation 12 months in its unopened packaging and stored in a dry, frost-free place
Warranty RC manufacturer

Product instructions


Questions & answers




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Made in France

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