Conplast MR276 - Plasticiser for cold climates

Plasticiser admixture for cold climates. Dosage: 0.3-1.0% over cement weight.









For the manufacture of concrete of different consistencies, without changes in the dosage of aggregates or cement, modifying only the dose of additive in the prepared concrete plant.

At low doses behaves as a plasticiser additive.

By varying the dosages, it can also be used as superplasticizer or as a high-range water reducer.


  • At high doses, it does not produce considerable variations in the setting time.
  • Reduced viscosity.
  • Control of air occlusion.
  • It can be used in reinforced concrete, prestressed or in mass, to be free of chlorides.
  • It facilitates the placement of concrete in a simpler and faster way.
  • Increases mechanical resistance considerably.
  • It allows to increase the workability without adding extra water and therefore maintaining the levels of resistance.
  • Reduces permeability in concrete.


Conplast MR276 complies with UNE-EN 934-2: 2010 Table 2 as a water reducer / plasticizer.


Conplast MR276 is a multifunctional plasticizer formulated from a blend of synthetic and natural polymers.

Optimal dosing

The optimum dosage of Conplast MR276 to achieve specific requirements must be determined by tests, using the materials and conditions that will be used in practice.

A starting point for such tests is to employ a dosage of between 0.3 and 1 liter of Conplast MR276 per 100 kg of cementitious material, including ash, slag and microsilice


The following results were obtained at a temperature of 20 ° C:

  • Appearance: Dark brown liquid
  • Density: 1.185 ± 0.01 kg / l
  • PH: 3.5 ± 1.0
  • Content in water-soluble chlorides (CI-): ≤ 0,10%
  • Alkaline content (Na2O equivalent): max. 5% by mass
  • Main function: Increase workability
  • Secondary function: Increase mechanical resistance

How to use


Conplast MR276 is compatible with other Fosroc Euco additives in the same concrete mix. If more than one additive is used, these must be added to the concrete separately and not mixed together before being added. The resulting properties of the concrete containing more than one additive should be checked by prior testing.

Conplast MR276 is suitable for use with all cements complying with the RC-08 standard.

Dosing system

The appropriate amount of Conplast MR276 should be measured by means of a suitable doser. The additive should be added to the concrete with the kneading water to obtain the best results. Contact the Technical Department of Fosroc Euco to be advised on the appropriate equipment and its installation.

Effects of overdosage

An overdose of twice the maximum indicated dose can cause delay of concrete setting as well as an additional air occlusion.


The final characteristics of all structural concrete will depend on good curing practice. Therefore, it is very important to use a Fosroc Euco Concure curing membrane, water spray or wet burlap.

Cleaning and Disposal

Conplast MR276 spills should be absorbed with sand or earth and transferred to appropriate containers. The product residues should be sandblasting with large amounts of water. Disposal of the product and packaging is the responsibility of the end user.


Conplast MR276 has a storage period of 12 months if kept in a dry place and in its original containers and closed at a temperature between 2 ° C and 40 ° C.

Freezing point: -3 ° C approx.


Safety and hygiene

Conplast MR276 should not be ingested or put into contact with skin and eyes. Wear protective gloves and goggles.

Splashes on the skin are removed with water. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If swallowed, seek medical advice immediately. Do not induce vomiting.

For more information, consult the Material Safety Data Sheet.


Conplast MR276 is water based and non-flammable.


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