Skip to Content


Three-component, water-expanding hydrogel

  • Flexible
  • Extreme low viscosity
  • Can be used for injection hoses

Features and benefits

For injection applications for extreme fine cracks which hardens to form a High quality rubber-like, flexible product.



POLYBIT® POLYINJECT RUBBER is a three-component, waterexpanding hydrogel on acrylate or methacrylate basis that hardens to a rubber-like, flexible product. POLYINJECT RUBBER can be applied in the case of grout curtains, brickwork injection, horizontal barriers, injection hose grouting and ground stabilization. POLYINJECT RUBBER has an extremely low blending viscosity that is almost equivalent to the viscosity of water. This allows the use of POLYINJECT RUBBER for injection applications for extreme fine cracks and massive walls with thicknesses above 50cm. In cured state POLYINJECT RUBBER has a sound chemical resistance against many acids, bases, solvents and fuels etc. Due to its high-quality material basis (see resistance list). During reaction and in a cured state POLYINJECT RUBBER emits no toxic substances into the groundwater. Product elements that are not built in during the reaction process (monomers, intermediates) are rapidly and completely biodegradable. Differing pot lives can be defined (see table pot life), adapted to the application and environmental temperature, by varying the amount of B component (40 g to 1000 g based on 20 kg A1 components. Pack size: 21.3Kg/Kit

Documents and downloads

How to use

Surface Preparation

The surface must be stable and free of separating substances.Insufficiently firm layers and concrete slurry must be removed. For this purpose the surface may be prepared by suitable mechanical processes such as e.g. shot blasting, milling or any other suitable mechanical means. Blow the cracks and treated surface with oil free air to ensure complete removal of all dust and loose particles. In the presence of running water the flow must be stopped using Polyinject Stop which produces a rapid setting water-stopping foam. When the water is stopped the cracks are re-injected with Polyinject Rubber.

Work preparation

Polyinject Rubber is be applied as injection resin using injection packers and 2-C pumps equipped with a flushing unit. The injection packers may be fixed into holes drilled directly into the crack or drilled diagonally from concrete adjacent to the crack or by the fixing of injection nipples. For further assistance and instructions regarding the packer fixing and design please refer to our method Statement. 


Polyinject Rubber consists of 3 components. The all container is poured completely into the A1 container and mixed for approx. 3 minutes. The B component is filled in the desired amount into a container equivalent to the A1 component and filled with clean tap water up to the same mass as A1 + A11, then it is mixed again for 3 minutes. The A and B components prepared in this way are ready for use and are processed 1:1 with a 2-component injection pump equipped with a flushing unit. The use of the injection pumps that feature forced conveyance of 1:1 (A to B component) is recommended in order to prevent mixing errors. The A1 component activated with AII can be used for approx. 24 hours (depending on temperature). Using the activated A1 component is not recommended after this period. The ready-for-use B component remains stable for approx. 5 hours (depending on temperature). The required potlife can be defined depending on the amount of B component (salt) and the temperature. The amount of component B should never be below 40 g (based on 20 kg of A1 component) to assure a reliable reaction. Likewise should the amount of component B not exceed 1000 g (based on 20 kg of A1 component) to avoid degradation of the product properties. The amount of component B shall never exceed 300 g (based on 20 kg of A1 component) in case of crack injection on reinforced concrete. Never mix the A1+A11 mixture together with B component. 

Related articles

  • Bitustick Cool

    The Next Generation of Performed Bituminous Coatings 

  • Foundations and Roofing Systems

    Discover, feel and touch our systems, through our mockup simulation boxes 

  • Wet Areas and Flooring Systems

    Discover, feel and touch our systems, through our mockup simulation boxes 

  • Polycryl FR

    The Ultimate Fire Rated Coating Solution 

  • Polycryl PF

    Strong UV protection For Polyurethane Foam Roof  

  • Bituplus Ultra

    The Ultimate Torch On Membrane Range 

Related products

  • ${/content/heliux/adhesive/polybit/com/en/products/central-pdp#/polybit-polyinject-hose-pvc/SAP_0201WQP346X7/searchResult.productFields.MainImageAltText}
    Used to seal joints in concrete against water gress. 
  • ${/content/heliux/adhesive/polybit/com/en/products/central-pdp#/polybit-polyinject-stop/SAP_0201WQP346Y0/searchResult.productFields.MainImageAltText}
    Polyinject Stop is a two component, fast setting polyurethane injection foam to stop water leakage/flow from concrete and masonry structures. 
  • ${/content/heliux/adhesive/polybit/com/en/products/central-pdp#/polybit-polyinject-ep/SAP_0201WQP34GJ5/searchResult.productFields.MainImageAltText}
    POLYBIT Polyinject EP
    2-component injection resin on epoxide basis with specific chemical and physical properties to seal and bond cracks of widths between 0.05 mm and 10 mm. Due to its low mixture viscosity 

Frequently asked questions

Acrylate based hydrogel

Within 40 minutes

Approximately 20% by volume