Fischer GeoCompact®

Fischer GeoCompact has been specially developed for the backfilling of geothermal probe drillings. The material is also suitable for locations with sulphate-aggressive groundwater. All other sealing and backfilling work in the wells and underground engineering can be carried out safely.

The good processing properties of Fischer GeoCompact facilitate the grouting of geothermal probes on the construction site – the grouting material can be mixed to a pumpable suspension after adding clean water in the standard mixing units. Fischer Spezialbaustoffe GmbH recommends the mixing and injection system MAT IEC-40 for processing the grouting material for geothermal probes.

Fischer GeoCompact complies with the current recommendations of the VDI guideline for thermal use of the subsoil (VDI4640, Thermal use of the subsoil, sheet 2).

Technical data sheet
Safety data sheet
Demand Calculator

Fields of application Fischer GeoSecure is a magnetically doped building material, therefore the control measurements are possible at any time. It has been specially developed for backfilling geothermal boreholes in sulphate-aggressive groundwater and combines all positive properties in one product. Generally suitable for backfilling of the cavity and soil consolidation.
Suitable area of application Can be used in any surface.
Mixing ratio 6.25 l of water: 25 kg of Fischer GeoSecure for compulsory mixers or
10.0 I of water: 25 kg Fischer GeoSecure for colloidal mixers.
Pay attention to the precise water proportioning.
Processing time Process quickly after mixing
Processing temperature can be processed from +5 °C to max. +25 °C
Consumption 1520 kg of Fischer GeoSecure® pro m³
Productivity 720 l/t 18.0 l/25 kg Sack
Marsh funnel time 71 sec.
Suspension density ~ 1,9 kg/dm³
Thermal conductivity ≥ 2,40 W/mK (ausgehärtete Hinterfüllmasse)
Compressive strength > 10,0 N/mm²
Water permeability-coefficient kf < 10-9 m/s
Tools / Equipment Fischer GeoSecure can be mixed to a pumpable suspension after adding clean water in the standard mixing systems. The mixing time depends on the mixer, but should be selected until a uniform consistency is achieved.
Storage Can be stored for approx. 4 months in the unopened original container on a pallet.
Delivery form 25 kg sack /42 sack per Euro pallet + Big Bags
Notes about your safety Contains cement, highly alkaline on reaction with moisture/water, therefore protect skin and eyes. In case of contact rinse thoroughly with water. In case of eye contact, consult a doctor. Not subject to classification according to the Ordinance on Hazardous Substances. Please note the safety data sheet for Fischer GeoSecure.
Disclaimer The above specifications are applicable for the tests under laboratory conditions with the usual metrological tolerances. These tests were carried out to investigate the suitability of the products with regard to the field of application. They are non-binding and do not release the recipient of the declaration from its own tests and trials. As a result of the absence of features and/or properties, we do not accept any responsibility; nor it is possible to derive any claims for compensation.

  • Conforms to VDI 4640
    Thermal use of the subsoil Sheet 2

  • Very easy to process
    Good-quality of product facilitates everyday work on the construction site easier

  • Sulphate resistance
    Especially for geothermal drilling in case of sulphate-aggressive groundwater.

  • High productivity
    Economic grouting

  • Thermal conductivity
    Thermally optimised with a thermal conductivity > 1.40 W/mk

  • Frost resistance
    According to DIN 52104

Fischer GeoSecure®

Thermally optimised, magnetically doped grouting material especially for geothermal probes, more safety through measurability in the annulus,
suitable for use with sulphate-aggressive groundwater

Fischer GeoSecure allows a control test for annulus filling at any time and has been specially developed for use in sulphate-aggressive ground water for backfilling of geothermal probe boreholes. Fischer GeoSecure combines all positive properties in one product. It is generally suitable for backfilling of the cavity and soil consolidation.

A thermal conductivity of more than 2.4 W/mK ensures a thermally optimal connection of the probe to the ground, increasing the efficiency of the entire geothermal heating system.

The good processing properties of Fischer GeoSecure facilitate the grouting of geothermal probes on the construction site – the grouting material can be mixed to a pumpable suspension after adding clean water in the standard mixing units. Fischer Spezialbaustoffe GmbH recommends the mixing and injection system MAT IEC-40 for processing the grouting material for geothermal probes.

Fischer GeoSecure complies with the current recommendations of the VDI guideline for the thermal use of the subsoil (VDI4640, Thermal use of the subsoil, sheet 2).

Technical data sheet
Safety data sheet
Demand Calculator

Fields of application Fischer GeoSecure® is a magnetically doped building material, therefore the control measurements are possible at any time. It has been specially developed for backfilling geothermal boreholes in sulphate-aggressive groundwater and combines all positive properties in one product. Generally suitable for backfilling of the cavity and soil consolidation.
Suitable area of application Can be used in any surface.
Mixing ratio 6.25 l of water: 25 kg of Fischer GeoSecure® for compulsory mixers or
10.0 I of water: 25 kg Fischer GeoSecure® for colloidal mixers.
Pay attention to the precise water proportioning.
Processing time Process quickly after mixing
Processing temperature can be processed from +5 °C to max. +25 °C
Consumption 1520 kg of Fischer GeoSecure® pro m³
Productivity 720 l/t 18.0 l/25 kg Sack
Marsh funnel time 71 sec.
Suspension density ~ 1,9 kg/dm³
Thermal conductivity ≥ 2,40 W/mK (set backfilling compound)
Compressive strength > 10,0 N/mm²
Water permeability-coefficient kf < 10-9 m/s
Tools / Equipment Fischer GeoSecure can be mixed to a pumpable suspension after adding clean water in the standard mixing systems. The mixing time depends on the mixer, but should be selected until a uniform consistency is achieved.
Storage Can be stored for approx. 4 months in the unopened original container on a pallet.
Delivery form 25 kg sack /42 sack per Euro pallet + Big Bags
Notes about your safety Contains cement, highly alkaline on reaction with moisture/water, therefore protect skin and eyes. In case of contact rinse thoroughly with water. In case of eye contact, consult a doctor. Not subject to classification according to the Ordinance on Hazardous Substances. Please note the safety data sheet for Fischer GeoSecure®.
Disclaimer The above specifications are applicable for the tests under laboratory conditions with the usual metrological tolerances. These tests were carried out to investigate the suitability of the products with regard to the field of application. They are non-binding and do not release the recipient of the declaration from its own tests and trials. As a result of the absence of features and/or properties, we do not accept any responsibility; nor it is possible to derive any claims for compensation.

  • Control test for backfilling of the annulus is possible at any time

  • For sulphate-aggressive groundwater
    Especially for geothermal drilling in case of sulphate-aggressive groundwater

  • Conforms to VDI 4640
    Thermal use of the subsoil, sheet 2.

  • Rarely post-grouting necessary
    Efficient and economical grouting

  • Frost resistance
    According to DIN CEN/TS 12390-9

  • Very high thermal conductivity
    Thermally optimised with a thermal conductivity ≥ 2.40 W/mK.

  • Resistance to seawater and carbon dioxide
    Resistance to sea water and carbon dioxide (CO2).

Fischer GeoSolid®

Thermally optimised grouting material/backfilling material for geothermal probes in the sulphate-aggressive groundwater

The Fischer GeoSolid® 240HS grouting material was not only specially developed for use with geothermal probes, but can also be used for sulphate-aggressive groundwater. A thermal conductivity of more than 2.4 W/mK ensures a thermally optimal connection of the probe to the ground, increasing the efficiency of the entire geothermal heating system. In addition, the good physical properties and high mechanical strength ensure a long service life and high resistance to environmental influences.

Fischer GeoSolid® 240HS also fulfils the requirements of frost resistance according to DIN CEN/TS 12390-9 and is proven to be resistant to freeze-thaw cycles. This means that the grouting material can also be used under difficult geological conditions and in compliance with stringent official requirements.

The grouting material can be mixed to a pumpable suspension after adding clean water in the standard mixing units. Fischer Spezialbaustoffe GmbH recommends the mixing and injection system MAT IEC-40 for processing the grouting material for geothermal probes.

Fischer GeoSolid® 240HS complies with the current recommendations of the VDI guideline for the thermal use of the subsoil (VDI4640, Thermal use of the subsoil, sheet 2).

Technical data sheet
Safety data sheet
Demand Calculator

Fields of application Fischer GeoSolid® 240HS has been specially developed for sulphate-aggressive groundwater for backfilling of the geothermal probe drillings and combines all positive properties in one product. It is generally suitable for backfilling of the cavity and soil consolidation.
Suitable area of application Can be used in any surface.
Mixing ratio 6.25 l of water: 25 kg Fischer GeoSolid® 240HS for compulsory mixers or
10.0 I of water: 25 kg Fischer GeoSolid® 240HS for colloidal mixers.
Pay attention to the precise water proportioning.
Processing time Process quickly after mixing
Processing temperature can be processed from +5 °C to max. +25 °C
Consumption 1520 kg Fischer GeoSolid® 240HS per m³
Productivity 720 l/t 18.0 l/25 kg Sack
Flow spread 215 mm (DIN EN 12350 part 5)
Marsh funnel time 69 sec.
Suspension density ~ 1,9 kg/dm³
Thermal conductivity ≥ 2,40 W/mK (set backfilling compound))
Compressive strength > 10,0 N/mm²
Water permeability-coefficient kf < 10-9 m/s
Tools / Equipment Fischer GeoSolid® 240HS can be mixed to a pumpable suspension after adding clean water in the standard mixing units. The mixing time depends on the mixer, but should be selected until a uniform consistency is achieved.
Storage Can be stored for approx. 4 months in the unopened original container on a pallet.
Delivery form 25 kg sack /42 sack per Euro pallet + Big Bags
Notes about your safety Contains cement, highly alkaline on reaction with moisture/water, therefore protect skin and eyes. In case of contact rinse thoroughly with water. In case of eye contact, consult a doctor. Not subject to labelling according to the Ordinance on Hazardous Substances. Please note the safety data sheet for Fischer GeoSolid® 240HS.
Disclaimer The above specifications are applicable for the tests under laboratory conditions with the usual metrological tolerances. These tests were carried out to investigate the suitability of the products with regard to the field of application. They are non-binding and do not release the recipient of the declaration from its own tests and trials. As a result of the absence of features and/or properties, we do not accept any responsibility; nor it is possible to derive any claims for compensation.

  • For sulphate-aggressive groundwater
    Especially for geothermal drilling in case of sulphate-aggressive groundwater

  • Conforms to VDI 4640
    Thermal use of the subsoil, sheet 2.

  • Rarely post-grouting necessary
    Efficient and economical grouting

  • Resistance to seawater and carbon dioxide
    Resistance to sea water and carbon dioxide (CO2).

  • Very high thermal conductivity
    Thermal conductivity ≥ 2.40 W/mK

  • Very good processability
    High-quality product facilitates everyday work on construction site easier

Fischer GeoFlow®

Very efficient grouting material with effective thermal conductivity for geothermal probes, well drilling and underground engineering

The grouting material of Fischer GeoFlow has been specially developed for backfilling of the geothermal probe drillings, but also for sealing and backfilling work in the well construction and underground engineering. The product has a particularly high productivity and reduces borehole resistance. The material is also suitable for locations with sulphate-aggressive groundwater.

The good processing properties of Fischer GeoFlow facilitate the grouting of geothermal probes on the construction site – the grouting material can be mixed to a pumpable suspension after adding clean water in the standard mixing systems. Fischer Spezialbaustoffe GmbH recommends the mixing and injection system MAT IEC-40 for processing the grouting material for geothermal probes.

Fischer GeoFlow complies with the current recommendations of the VDI guideline for the thermal use of the subsoil (VDI4640, Thermal use of the subsoil, sheet 2).

Technical data sheet
Safety data sheet
Demand Calculator

Fields of application Fischer GeoFlow has been specially developed for backfilling of the geothermal probe drillings, but also for sealing and backfilling work in the well construction and underground engineering. The product combines a particularly high productivity with a very high thermal conductivity. The material is also suitable for locations with sulphate-aggressive groundwater.
Suitable area of application Can be used in any surface.
Mixing ratio 12.0 l of water: 25 kg Fischer GeoFlow for compulsory mixers or 16.0 l water: 25 kg Fischer GeoFlow for colloidal mixers. Pay attention to the precise water proportioning.
Processing time Process quickly after mixing
Processing temperature can be processed from +5 °C to max. +25 °C
Consumption 1020 kg of Fischer GeoFlow per m³
Productivity 985 l/t
Marsh funnel time 68 sec.
Suspension density ~ 1,6 kg/dm³
Effective thermal conductivity 2,0 W/mk
Compressive strength > 5.0 N/mm²
Water permeability-coefficient kf < 10-9 m/s
Tools / Equipment Fischer GeoFlow can be mixed to a pumpable suspension in the standard mixing systems after adding clean water. The mixing time depends on the mixer, but should be selected until a uniform consistency is achieved.
Storage Can be stored dry on a pallet for approx. 6 months in the unopened original containers.
Delivery form 25 kg sack /40 sack per Euro pallet + Big Bags
Notes about your safety Contains cement, highly alkaline on reaction with moisture/water, therefore protect skin and eyes. In case of contact rinse thoroughly with water. In case of eye contact, consult a doctor. Not subject to classification according to the Ordinance on Hazardous Substances. Please note the safety data sheet for Fischer GeoFlow.
Disclaimer The above specifications are applicable for the tests under laboratory conditions with the usual metrological tolerances. These tests were carried out to investigate the suitability of the products with regard to the field of application. They are non-binding and do not release the recipient of the declaration from its own tests and trials. As a result of the absence of features and/or properties, we do not accept any responsibility; nor it is possible to derive any claims for compensation.

  • High cost-efficiency
    Efficient use of material due to high productivity

  • Effective thermal conductivity
    Thermally optimised additives, as well as fine aggregates with an effective thermal conductivity of 2.0 W/mk

  • Conforms to VDI 4640
    Thermal use of the subsoil, sheet 2

  • Very easy to process
    Good-quality of product facilitates everyday work on the construction site easier

  • Sulphate resistance
    Especially for geothermal drilling in case of sulphate-aggressive groundwater

  • Frost resistance
    According to DIN EN 12371:2010-07

Fischer GeoFlow IQ®

Magnetically doped, very efficient grouting material with high thermal conductivity for geothermal probes, well drilling and underground engineering.

Fischer GeoFlow IQ® is a magnetically doped building material, therefore the control measurements are possible at any time. It has been specially developed for backfilling of the geothermal probe drillings, but also for sealing and backfilling work in the well construction and underground engineering. The product combines a particularly high productivity with a very high thermal conductivity.

The material is also suitable for locations with sulphate-aggressive groundwater.

Technical data sheet
Safety data sheet
Demand Calculator

Fields of application Fischer GeoFlow IQ® is a magnetically doped building material, therefore the control measurements are possible at any time. It has been specially developed for backfilling of the geothermal probe drillings, but also for sealing and backfilling work in the well construction and underground engineering. The product combines a particularly high productivity with a very high thermal conductivity. The material is also suitable for locations with sulphate-aggressive groundwater.
Suitable area of application Can be used in any surface.
Mixing ratio 12.0 l of water: 25 kg Fischer GeoFlow IQ® for compulsory mixers or 16.0 l water: 25 kg Fischer GeoFlow IQ® for colloidal mixers. Pay attention to the precise water proportioning.
Processing time Process quickly after mixing
Processing temperature can be processed from +5 °C to max. +25 °C
Consumption 1020 kg of Fischer GeoFlow IQ® per m³
Productivity 985 l/t
Marsh funnel time 68 sec.
Suspension density ~ 1,6 kg/dm³
Effective thermal conductivity 2,0 W/mk
Compressive strength > 5.0 N/mm²
Water permeability-coefficient kf < 10-¹⁰ m/s
Tools / Equipment Fischer GeoFlow IQ® can be mixed to a pumpable suspension in the standard mixing systems after adding clean water. The mixing time depends on the mixer, but should be selected until a uniform consistency is achieved.
Storage Can be stored dry on a pallet for approx. 6 months in the unopened original containers.
Delivery form 25 kg sack /40 sack per Euro pallet + Big Bags
Notes about your safety Contains cement, highly alkaline on reaction with moisture / water, therefore protect skin and eyes. In case of contact rinse thoroughly with water. In case of eye contact, consult a doctor. Not subject to classification according to the Ordinance on Hazardous Substances. Please note the safety data sheet for Fischer GeoFlow IQ®.
Disclaimer The above specifications are applicable for the tests under laboratory conditions with the usual metrological tolerances. These tests were carried out to investigate the suitability of the products with regard to the field of application. They are non-binding and do not release the recipient of the declaration from its own tests and trials. As a result of the absence of features and/or properties, we do not accept any responsibility; nor it is possible to derive any claims for compensation.

  • More safety through measurability
    Control check possible at any time

  • High cost-efficiency
    Efficient use of material due to high productivity.

  • High thermal conductivity
    Thermally optimised with a thermal conductivity > 2.0 W/mk.

  • Conforms to VDI 4640
    Thermal use of the subsoil, sheet 2.

  • Very easy to process
    Very easy to process

  • Sulphate resistance
    Especially for geothermal drilling in case of sulphate-aggressive groundwater.

  • Frost resistance
    According to DIN EN 12371:2010-07

Fischer GeoTight®

Inexpensive grouting material for backfilling of the cavities of any kind without special requirements.

Fischer GeoTight® is a grouting material consisting of standardised hydraulic binders with mineral additives. The product also hardens under water and can be used in drinking water and in corresponding protection zones. The suspension has excellent pumpability and flowability in various mixing ratios from 0.5 to 0.8.

The material is also suitable for locations with sulphate-aggressive groundwater.

Technical data sheet
Safety data sheet
Demand Calculator

Fields of application Fischer GeoTight® is a grouting material consisting of standardised hydraulic binders with mineral additives. The product also hardens under water and can be used in drinking water and in corresponding protection zones. The suspension has excellent pumpability and flowability in various mixing ratios from 0.5 to 0.8. The material is also suitable for locations with sulphate-aggressive groundwater.
Suitable area of application Can be used in any surface.
Mixing ratio 0.6 | 0.7 (geothermal) | 0.8
Processing time Process quickly after mixing (within one hour).
Processing temperature can be processed from +5 °C to max. +25 °C
Consumption 955 kg/m³ | 971 kg/m³ | 870 kg/m³
Productivity 960 l/t | 1060 l/t | 1160 l/t
Frost resistance according to DIN EN 12371:2010-07
Marsh funnel time 115 sec. | 45 sec. | 38 sec
Suspension density ~ 1,65 kg/dm³ | ~ 1,65 kg/dm³ | ~ 1,57 kg/dm³
Effective thermal conductivity 1,1 W/mk
Compressive strength > 0,8 / 1,7 / 2,7 N/mm² (2 Days) | > 0,7 / 1,3 / 2,1 N/mm² (7 Days) | > 0,5 / 1,5 / 1,6 N/mm (28 Days)
Water permeability-coefficient kf < 10-9 m/s | < 10-9 m/s
Tools / Equipment Fischer GeoTight can be mixed to a pumpable suspension in the standard mixing systems after adding clean water. The mixing time depends on the mixer, but should be selected until a uniform consistency is achieved.
Storage Can be stored dry on a pallet for approx. 6 months in the unopened original containers.
Delivery form 25 kg sack /40 sack per Euro pallet + Big Bags
Notes about your safety Contains cement, highly alkaline on reaction with moisture / water, therefore protect skin and eyes. In case of contact rinse thoroughly with water. In case of eye contact, consult a doctor. Not subject to classification according to the Ordinance on Hazardous Substances. Please note the safety data sheet for Fischer GeoTight®.
Disclaimer The above specifications are applicable for the tests under laboratory conditions with the usual metrological tolerances. These tests were carried out to investigate the suitability of the products with regard to the field of application. They are non-binding and do not release the recipient of the declaration from its own tests and trials. As a result of the absence of features and/or properties, we do not accept any responsibility; nor it is possible to derive any claims for compensation.

  • Very favourable
    Extremely high productivity depending on mixing ratio.

  • Complies with DVGW worksheet W347
    Hygienic requirements for materials in the drinking water system.

  • Very easy to process
    Very fine, easily pumpable and flowable material with mineral components.

  • Frost resistance
    According to DIN EN 12371:2010-07

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