Waterproof underlay

Strengths:
  • Étanchéité SPEC
  • Bloque les remontées d'humidité
  • Adhérence optimale

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.

Calculate your exact area

Total area 0,00 m²
Recommended packaging
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€57.59
Tax included

In stockProduct shipped in 48h

Packaging

Estimated delivery between Monday 26 October and Wednesday 28 October
  • Free delivery on polished concrete kits of 10m² or more
  • Payment in 2 or 3 installments available
    for metropolitan France
  • Customer service available 5 days a week
    to support you with your project
  • Quality product made in France
  • Description

  • Features
  • Payment & Delivery
  • Videos
  • Reviews

Description

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.

Characteristics

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.

Preparation

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.

Application

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.

Payment

We ensure secure payment by

Pay in 4 installments at no extra cost

Pay in 3 or 4 installments using your bank card (Carte Bleue, Visa, or MasterCard). This 3 or 4-installment payment option is available for any order totaling more than €100, up to a limit of €2,000. Currently, the Alma payment solution is available exclusively to customers holding a bank card issued in France.

Pay in 4 installments at no extra cost

Exclusively for individuals residing in France (a French PayPal account is required). PayPal "Pay in 4" is available subject to approval for purchases between €30 and €2,000. A 14-day withdrawal period applies.

Delivery

  • Product shipped in 72h upon receipt of payment. Delivery within 2 to 5 days, depending on the size and weight of the package.

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

  • For Corsica, the French overseas territories (DOM-TOM), or other destinations in Europe, please contact us so that we can provide a shipping quote. Contact us

Contact us

You can contact us

Complete your project

Do you have everything you need for your project?

Polished concrete kits contain the essentials for carrying out your project. Depending on the surface, the room, and the intended use, certain tools or maintenance products may also be helpful to ensure you can complete the job with ease.

01
Application

Tools for a clean application

If you are not already equipped, these tools facilitate application and prevent marks.

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Our video tutorials

Reviews that speak for themselves

4.8/5
Basé sur 10 avis soumis à un contrôle
Voir l'attestation de confiance
5/5
Excellent produit
Avis du 15/03/2026, suite à une expérience du 26/02/2026 par Mateusz M.
5/5
Facile à mettre en oeuvre et efficace
Avis du 09/03/2022, suite à une expérience du 17/02/2022 par a A.
5/5
S’applique facilement
Avis du 10/11/2023, suite à une expérience du 18/10/2023 par a A.
5/5
Bon produit. Bien dépoussiérer le placoplâtre.
Avis du 09/05/2026, suite à une expérience du 09/04/2026 par rémi R.
3/5
Pas assez collant
Avis du 29/05/2024, suite à une expérience du 13/05/2024 par a A.
5/5
....
Avis du 24/06/2024, suite à une expérience du 07/06/2024 par a A.
5/5
très bon produit. Conforme à mes attentes
Avis du 03/10/2018, suite à une expérience du 25/09/2018 par a A.
5/5
conforme à mes attentes. facile d'application. produit de qualité
Avis du 13/11/2018, suite à une expérience du 12/11/2018 par a A.
5/5
facile à poser. sa couleur verte permet de bien voir s'il y a des voir plus
facile à poser. sa couleur verte permet de bien voir s'il y a des manques. séchage rapide. pas d'odeur
Avis du 10/12/2018, suite à une expérience du 21/11/2018 par a A.
5/5
Produit très simple d’utilisation eh fiche technique plus que claire voir plus
Produit très simple d’utilisation eh fiche technique plus que claire
Avis du 27/11/2023, suite à une expérience du 15/11/2023 par a A.
Customer service

available 5 days a week

Secure payment

Up to 3 interest-free installments from 300€ of purchase

Free quote

Responses within 48 business hours

Free delivery

For the purchase of a polished concrete kit from 10m2

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ISY polished concrete: Ready to use, it simplifies your project thanks to the absence of weighing and mixing. Simply turn on the water and apply. Ideal for a consistent finish, it features a uniform surface with minimal texture.
To suit all your needs, we offer a wide range of 90 colors. Packaged in 10 m² buckets.

Tradit polished concrete: Traditional two-component polished concrete to be mixed before application. It is appreciated for its numerous shades and textured effects, providing an authentic and textured appearance.
With 30 colors available, you can elegantly personalize your spaces. This product is available from 2 m², making it ideal for projects of all sizes.
There is no one better than the other; the difference lies only in your expectations.

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