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Mapei Idrocrete KR 1000, concrete admixture: the pack
Mapei's own picture. The pack we stock: 20 kg.

Mapei · Concrete admixtureNo. 47 / 47

Idrocrete KR 1000

Crystallizing admixture for waterproof concrete.

Crystallizing admixture for waterproof concrete

  • Idrocrete KR 1000 may be used with any type of concrete when a reduction of permeability is required
  • Idrocrete KR 1000 may be used to make concrete that is resistant to aggressive environments
  • Dams
  • Storage tanks
  • Retaining walls
  • Tunnels
  • Basements and foundations
  • Swimming pools
Consumption
1-3 kg per 100 kg of cementitious materials
Pack we stock
20 kg

Related documentation

  • Technical data sheet

    Edition 7804-12-2019 (GB) · 4 pages · 169 KB · PDF

    DownloadOpen
  • Safety data sheet

    Sent by WhatsApp or email

    Request

Mapei's own document, unaltered, saved on 2026-11-05. Mapei revises its data sheets: ask us for the current edition before you specify.

Coverage calculator

The arithmetic uses Mapei's published consumption for Idrocrete KR 1000 and the pack sizes we stock. Set your own wastage allowance.

kg
%

You need

1

x 20 kg bag

Data sheet quantity
3.5-10.5 kg
With 10% wastage
3.85-11.6 kg
Send this to WhatsApp for a quote

The figures behind it.

  • The recommended dosage rate for Idrocrete KR 1000 is 1-3 kg/100 kg of cementitious materials.
  • The crystallising admixture is added at a rate of 1-3% on the weight of the binder into the mixer unit along with the aggregates, cement, water and plasticising admixture and then mixed until it is completely blended.

Consumption on site depends on the substrate, the tool and the applicator, which is why wastage is yours to set. The result is a quantity to plan and quote with, not a guarantee of coverage. Confirm the system against the current Mapei technical data sheet before ordering.

Application

In Mapei's own words, from the technical data sheet.

  1. 01Idrocrete KR 1000 may be used with any type of concrete when a reduction of permeability is required
  2. 02Idrocrete KR 1000 may be used to make concrete that is resistant to aggressive environments
  3. 03Dams
  4. 04Storage tanks
  5. 05Retaining walls
  6. 06Tunnels
  7. 07Basements and foundations
  8. 08Swimming pools

Where it is not the right product.

  • The specified exposure class of the concrete must always be respected and the product cannot be used to make up for poorly designed concrete
  • To have guaranteed results, Idrocrete KR 1000 must only be used in concrete that has been correctly designed respecting two basic rules for the production of impermeable concrete, which are, a water/cement ratio of less than 0.5 and an adequate wet curing time
  • Different dosage rates to those recommended above must be tested beforehand on concrete and, in all cases, only after consulting MAPEI Technical Services

Specification

  • EN 934-2 · water resisting admixture, table 9
  • Reg. (EC) N. 1907/2006 (REACH) - Annex XVII, article 47 · This product complies with the prescriptions of Reg. (EC) N. 1907/2006 (REACH) - Annex XVII, article 47.
Consistency
powder
Colour
grey
Density (g/cm³)
2.2 ± 0.1
Classification according to EN 934-2
water resisting admixture, table 9
Chlorides soluble in water according to EN 480-10 (%)
< 0.1 (absent according to EN 934-2)
Alkali content (equivalent Na₂O) according to EN 480-12 (%)
≤ 23

Typical values as Mapei prints them in data sheet edition 7804-12-2019 (GB). They are not a specification for your project: the current Mapei data sheet is.

On site

Packs, mixing and storage.

We stock
20 kg
Mapei packaging
Idrocrete KR 1000 is available in 20 kg and 4 kg water soluble bags.
Mixing
Idrocrete KR 1000 is added to the concrete mix just like any other type of powder admixture. The product must be added in the concrete mixer or in the truck mixer together with all the other components (cement, admixtures and aggregates). Once Idrocrete KR 1000 has been added, we recommend extending the adequate mixing time so that the admixture is evenly blended throughout the mix.
Storage
Idrocrete KR 1000 maintains its properties for at least 12 months if kept sealed in its original packaging, protected from moisture.

Idrocrete KR 1000 in Tanzania

Tell us the area. We will quote the job.

Sahihi is an authorized Mapei distributor in Dar es Salaam. Send the quantity of Idrocrete KR 1000 you need, or describe the job and we will work it out with you.