Winter concrete TB S 30 C30/37

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Product description

Fescon Winter Concrete is a special concrete that enables successful casting during winter at temperatures as low as -15°C.

  • Strength class C 30/37
  • Frost-resistant
  • Good workability
  • No chlorides


  • Horizontal grouting of elements
The product is listed in the portal for building products that can be used in Nordic Swan Ecolabelled buildings.
GTIN code Product name Product number Package size
6416841530042 WINTER CONCRETE TB S 30 C30/37 25 KG 53004 25 kg
6416841330048 WINTER CONCRETE TB S 30 C30/37 1000 KG 33004 1000 kg


The base must be undamaged and clean. Snow and ice must be melted away from the base. If necessary, also remove the weak-strength cement paste layer. Best adhesion can be achieved to a rough base. When using galvanised steels, you must make absolutely sure that the coating has become passive.


Refer to the bag for how much water the concrete requires. Add the dry material to the water and mix with a concrete mixer for around ten minutes. With a power mixer, around one to three minutes of mixing is sufficient. Let the mass stand for a while and mix it again for a short while. Find the correct consistency at this stage by gradually adding the rest of the water. We do not recommend adding all of the water right at the start. If you are unable to use the concrete immediately after mixing, we recommend mixing it again before casting. The finished concrete remains workable for around half an hour.

Work instructions

Casting should be done as soon as possible after mixing. If necessary, vibrate the casting lightly or ram it. Recommended casting layer thickness 15-100 mm. Follow the instructions of the designers and the official regulations on winter concreting when doing casting work.

After treatment

The fresh casting must be protected from snow and rain. Strength development continues without additional heating in temperatures above -15°C.

Other points to note 

Winter products will be available in the winter season, from 15 September to 1 March. At other times, the products must be ordered separately.

Storage and handling of waste
See the separate storage and disposal instructions

Water requirement 2.4 - 3.0 l / 25 kg of dry product
Finished compound 11 - 12 l / 25 kg of dry product
Composition portland cement, natural sand (max. grain size 3.0 mm), additives that improve workability and ensure strength development in freezing temperatures.
Maximum grain size

3 mm (the shape of natural stones may vary)

Package size 25 kg and 1000 kg
Lowest usage temperature


Workability time approx. 0.5 h
Strength class C 30/37
Strength development

1 day at +20°C approx. 20 MPa
7 days at +20°C approx. 30 MPa
28 days at +20°C approx. 40 MPa
7 days at -15°C +7 days at +20°C approx. 25 MPa
7 days at -15°C +28 days at +20°C approx. 35 MPa

Exposure class XC4, XD2, XF3, XA1

approx. 140 mm

Limitation of liability, product use notes and restrictions: Please familiarize yourself with Fescon Oy's general terms of delivery and the design and work instructions related to the product.