Delaying making concrete
- Idéal par forte chaleur
- Travail prolongé
- Ralentit le séchage
Liquid admixture retarding the taking of concretes, mortars, and coatings, maintaining the initial characteristics and which does not change the mechanical resistances finals, the assay performed : the time taken is not increased but only shifted.
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Packaging
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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
for metropolitan France -
Customer service available 5 days a week

to support you with your project -
Quality product made in France
Description
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Description
Harmony Retardant is an additive for setting concrete, mortar and finishing plaster, while maintaining the original properties of the material and not changing the mechanical ultimate strengths, regardless of the dosage.
The setting time is not increased, but delayed.
Characteristics
Type: liquid additive, for delaying the setting time
Colour: pink
Packaging: 1 l, 5 l
Density: 1,5
pH: 11
Dosage: 25ml / 35kg cement
Storage: 12 months in unopened original packaging, stored in a dry and frost-free location.
Guarantee: Manufacturer’s liability
Application
The dosage depends on the ambient temperature and the desired delay.
Standard dose: add 35kg cement + 25ml Harmony Retardant to the mixture.
In addition, we recommend the following dosage:
|
Beton-Temperature |
Starting from 25 ml per 35 kg cement |
|||||||
|
3h |
5h |
7h |
9h |
12h |
15h |
18h |
21h |
|
|
10°C |
- |
- |
3 |
4 |
7 |
10 |
13 |
14 |
|
15°C |
- |
1 |
4 |
6 |
8 |
11 |
15 |
21 |
|
20°C |
1 |
3 |
6 |
7 |
11 |
15 |
20 |
25 |
|
25°C |
3 |
4 |
7 |
8 |
14 |
21 |
28 |
- |
|
30°C |
3 |
6 |
8 |
11 |
17 |
28 |
- |
- |
|
40°C |
7 |
18 |
28 |
- |
- |
- |
- |
- |
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.
Using polypropylene fibres enables you to reinforce concrete and reduce the risk of cracking and crazing. We recommend you to use Harmony Béton water-reducing agent to modify the workability and plasticity of the concrete.
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For the purchase of a concrete kit covering 10m² or more