Complete acid stain kit
- Solution décorative complète
- Effet marbré permanent
- Réaction chimique béton
Our comprehensive Harmony Béton acid stain kit includes all the products you need for permanently colouring a concrete slab. The kit includes surface preparation agent, colouring acid, neutraliser, and wet-look glaze. Harmony Béton acid stain remains stable over time and withstands light and sunlight for years.
Check all the complementary products recommended for this project
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Free delivery on polished concrete kits of 10m² or more

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Payment in 2 or 3 installments available
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Quality product made in France
Description
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Preparatory Agent
Description
Harmony Preparatory Agent is used to prepare surfaces for the application of Harmony Acid Stain by opening up the pores in the base material.
It can also be used as a detergent to clean all concrete surfaces.
Caution: When smoothing P3 or P4, or in the case of a weak / absent porosity of the support, this product can not improve absorbency.
Characteristics
Type: Detergent
Packaging: 1 l, 5 l, 20 l
Dosage: 1 litre = 10 m2, undiluted and depending upon surface porosity
Storage: 12 months in unopened original packaging, stored in a dry and frost-free location.
Guarantee: Manufacturer’s liability
Tools & Cleaning
Viton seal sprayer, mask, gloves and protective goggles.
Clean tools in water after use.
Preparation
Before starting, ensure that no protective product such as pore sealant, lacquer or curing agent has been applied which might prevent the penetration of water.
To do this, apply a small quantity of water to the surface to be coloured at a number of points.
If the water is absorbed rapidly, the surface is porous.
Conversely, if the water forms into droplets, your surface is not porous, and there is a product present which is preventing the penetration of water.
At this stage of the process, it is essential to identify what type of product has been applied.
If the surface is protected by acrylic lacquers or a concrete wax finish, we would recommend the use of a lacquer stripper, or grinding of the surface concerned.
Application
Application must be completed within a temperature range of 10°C - 25°C.
1. Harmony Preparatory Agent should be applied without dilution.
Coverage: 1 litre/10 m2, depending upon surface porosity.
2. Spray Harmony Preparatory Agent in a highly-controlled directional jet, in order to prevent any inhalation of the mist generated by vaporisation.
3. Leave the product to work for a few minutes, then wash with Harmony neutral cleaning agent.
4. Rinse with water and leave to dry for 24 hours.
Acid Stain Dye
Description
Harmony Acid Stain Dye is a range of concentrated acid colorants for concrete, which react with the concrete by in- depth penetration to produce rich and vibrant colours which are reminiscent of natural mineral shades.
This product remains stable over time, providing many years of resistance to sunlight, and can be applied to any clean and dry Portland cement base surface (concrete, screed, levelling compound, etc.).
Characteristics
Type: Acid-based concrete colorants
Colours: 6
Odeur: sharp
pH: 0.5-1
Packaging: 1 l, 5 l, 20 l
Dosage: 1 litre = 8 / 10 m2 undiluted and subject to surface porosity.
Storage: 12 months in unopened original packaging, stored in a dry and frost-free location.
Guarantee: Manufacturer’s liability
Tools & Cleaning
Viton seal sprayer, mask, gloves and goggles, tarpaulin, long-handled scrubbing brush.
Clean tools in water after use.
Prepare the support
Concretes and screeds must be at least 14 days old.
Before starting, make sure that no protective agents such as varnishes or hardeners prevent the ingress of water. To find out apply a small amount of water on to the surface. If absorbed quickly, the surface is porous and can be stained with dye acid; when the water bubbles, the surface is not porous and something prevents water from entering.
At this stage of the process it is important to know what kind of product has been used. If the surface is protected by acrylic or concrete wax, we recommend the use of our paint remover or cleaning agent.
Prepare the surface using Harmony Preparatory agent.
Application Harmony Preparatory Agent
Application must be completed within a temperature range of 10 ° - 25 °.
Dosage: 1 l / 10 m2.
1. Use Harmony Preparatory agent undiluted.
2. It is essential that a protective mask and gloves should be worn during application.
3. The acid colorant cannot be walked on after application, unless studded boots are worn. It is recommended that protective overshoes should be worn, in order to avoid leaving any tread marks.
4. Allow the product to work for a few minutes, then rinse with a pH neutral cleaner or Harmony Neutral Cleaner.
5. Allow to dry for at least 24 hours or more, depending on the weather conditions, before applying Acid Stain.
Application Harmony Acid Stain Dye
After preparing the surface using Harmony Preparatory agent, protect all surfaces which are not to be coloured using a tarpaulin.
1st coat
Hold the PermaPro sprayer 30-60 cm above the concrete surface to be coloured. Lightly spray 1m2 of surface area with Harmony Acid Stain, using a Viton seal sprayer, then brush the surface using a long-handled broom or nylon brush to ensure that the acid penetrates the surface. Allow to dry for 2 - 4 hours. There is no need to rinse the concrete floor after the application of the first coat before applying the second coat. However, you may wish to rinse a small concealed section, in order to check that you are satisfied with the colour.
2nd coat
Once dry, spray the surface a second time, avoiding the formation of pools. Apply in the same way as the 1st coat BUT in the opposite direction. If you have worked from north to south, you will need to work from east to west for the 2nd application. Bubbles may appear during application, indicating that the acid is reacting. Wait for 2 - 4 hours after the 2nd application before commencing the neutralisation process.
Neutralisation
When Acid Stain is completely dry, remove all residue with a mop.
Then spray the surface with the Harmony Neutraliser.
Brush the surface with a broom and let the neutraliser work for 5 minutes.
Then rinse thoroughly with clear water.
If necessary, repeat the process several times until the desired result is achieved.
Protection
Let it dry for 72 hours.
Apply a varnish to enhance the colours and effects. Use our Wet-Varnish or SL Permapro.
For more information see data sheet Harmony Varnish.
Payment
We ensure secure payment by

Pay in 4 installments at no extra costPay 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 costExclusively 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
- Via chat: bottom right
- By phone: 04 42 20 10 09
Monday to Friday, 8:00 AM – 6:00 PM - By email: at contact@harmony-beton.com
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.
Tools for a clean application
If you are not already equipped, these tools facilitate application and prevent marks.
Application of form oils, water repellents surface treatment products wood and carpentry, stripper-borne, products, rodent control products, pest control, dégroudronnants, anti-foam neutral basis.
Roll special varnish for concrete - Ideal for applying varnish on large surfaces on the ground. Exists in 3 sizes (40, 50 and 60 cm).
This 250 mm complete roll is the perfect tool for the application of finishing layers on your decorative concretes (filler, varnish and resins...) It allows an easy application without leaving the traces of roll. Compatible with the handle 3 m alu.
Plastic buckets of 5, 11 or 20 L capacity for preparing and mixing, for example, waxed concrete, cement-glue or spray.
Apply protective adhesive tape to protect surfaces as necessary when placing your concrete.
Protective sheeting provides the necessary protection to all your surfaces before the application of your decorative concrete.
Products for maintaining your polished concrete
After application, proper maintenance helps preserve protection and finish.
Neutral Cleaner is a gentle yet effective maintenance product designed to preserve the shine and integrity of your floors and surfaces. With its neutral pH, this cleaner is ideal for delicate surfaces or those protected by varnishes. It is pleasantly scented and non-foaming, ensuring a deep clean without damaging your surfaces. It is perfect for daily use on treated surfaces, whether with a cloth, mop, or even a single-disc machine.
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