Xypex Bio-San is a uniquely designed admixture for integral, long-term protection of concrete in harsh sewage conditions with levels of H2S that cause microbial induced corrosion (MIC). Bio-San combines potent antimicrobial protection along with the unique crystalline technology of the Xypex Admix C-Series.

Bio-San contains bio-active mineral solids that become permanently fixed within the cement matrix impairing bio-film formation thus inhibiting the growth of acid causing sewer bacteria such as Thiobacillus due to concentrations of H2S. The unique Xypex Crystalline Technology creates a permanent structure throughout the pores and capillary tracts providing waterproofing and enhanced chemical protection including acid and sulphate resistance. Bio-San prevents microbial induced corrosion, stops infiltration/exfiltration of water, and provides acid and sulphate resistance, significantly extending the service life of concrete sewage collection systems and waste water infrastructure.

Xypex Admixtures now contain the latest in Xypex innovation, the Visual Detection System (VDS). It is designed to confirm the presence of Xypex Crystalline Waterproofing Admixture in hardened concrete. To learn more about VDS, click here: VDS

Product Data
Safety Data
Safety Data VIEW PDF
Brochure VIEW PDF

Advantages of Xypex

  • Inhibits microbial induced corrosion
  • Resists extreme hydrostatic pressure
  • Resistant to aggressive chemicals (acids and sulphates)
  • Can seal static hairline cracks up to 0.5 mm
  • Becomes a permanent, integral part of the substrate
    and cannot be punctured, damaged or lose adhesion
  • Does not contain any VOCs
  • Less costly to apply than most other methods
  • Added to the concrete at the time of batching and therefore
    not subject to weather and surface moisture constraints
  • Contains Visual Detection System

Recommended for

  • Manholes / Sewer Pipes
  • Pump and Lift Stations
  • Head Works
  • Septic Tanks
  • Digesters
  • Clarifiers
  • Industrial Structures


Xypex Bio-San is packaged in 50 lb. (22.7 kg) pails. Contact the manufacturer for availability of customsized packaging to meet the requirements of your specific project.

Dosage Rate

1% by weight of total cementitious content.


Xypex products must be stored dry at a minimum temperature of 45ºF (7ºC). Shelf life is one year when stored under proper conditions.

Bio-San Specific Details

Filling Tie Holes in Xypex Bio-San Concrete – Close + Details VIEW FILE

Xypex recommended procedures for waterproofing concrete tie holes in new construction where Xypex Bio-San C500 concrete has been used to protect against MICC attack.

Crack Repair in Xypex Bio-San Treated Concrete – Close + Details VIEW FILE

Xypex recommended procedure for crack repairs performed on the sewage side of concrete elements that contain Xypex Bio-San C500.

Repair of Defective Bio-San Concrete, Rock Pockets or Honeycombs – Close + Details VIEW FILE

Xypex recommended procedure for repair of standard, small or medium-large sized deficiencies in Xypex Bio-San C500 treated concrete.

General Resources

Product Data VIEW FILE
Specifications – Bio-San VIEW FILE

Calvert City WWTP Influent Lift Station & Plant Improvements

Calvert City, KY, USA

Xypex Bio-San was specified in the precast elements for the Wastewater Treatment Plant Influent Lift Station and Plant in Calvert City, Kentucky. Forterra Pipe & Precast added Bio-San to a total of 180 cubic yards of treated pre-cast concrete for this project.

Project Sheet
Project Sheet VIEW PDF

Long Term Control Plan Phase I WPCC Enhancement City of Marion

Marion, OH, USA

Initially, a crystalline waterproofing antimicrobial competitor was specified for this project. However, the competitors' products usually have many usage restrictions, in this case, it was not recommended for use in conjunction with air entrainment or supplemental concrete materials.

Project Sheet
Project Sheet VIEW PDF

Williamsburg WWTP Improvements

Williamsburg, Iowa, USA

The Williamsburg wastewater treatment plant project faced the challenge of preventing microbial-induced corrosion (MIC) in its wastewater treatment facility. The original specification called for a polyurethane coating to combat the high concentrations of hydrogen sulfide gas and prevent degradation of the concrete.

Project Sheet
Project Sheet VIEW PDF

Pinheiros Sewage Pumping Station

São Paulo, Brazil

Xypex Bio-San C500 was selected due to its ability to permanently waterproof the concrete and increase the structure’s resistance to sulfates and sulfuric acid attacks while preventing the growth of the bacteria that causes MIC.

Project Sheet
Project Sheet VIEW PDF

Michigan Avenue Harrison Road Sewer Improvement

East Lansing, Michigan, USA

Xypex Bio-San is a uniquely designed admixture for integral, long-term protection of concrete in harsh sewage conditions with levels of H2S that cause microbial induced corrosion (MIC). Bio-San combines potent antimicrobial protection along with the unique crystalline technology of the Xypex Admix C-Series.

Project Sheet
Project Sheet VIEW PDF

Projects Using This Product

Wastewater Collection & Treatment

River Islands Sewage Pump Station


The River Island Sewage Pump Station faced two major challenges: as a sewage pump station the concrete required protection from microbial induced corrosion (MIC); and 9 m (30 ft) of the 12 m (40 ft) deep structure would be immersed in the surrounding water table. Xypex Bio-San admixture was  chosen by the City of Lathrop as an alternative to the specified system.

Wastewater Collection & Treatment

South Lathrop Commons Center Sewage Pump Station


In order to protect the concrete structure from microbial induced corrosion and to achieve water tightness, Xypex Bio-San was added to the concrete mix at the Jensen Precast’s plant at the time of batching. The Bio-San contains antimicrobial crystalline technology which both kills the acid-producing microbes which proliferate in sewage structures as well as providing watertight, chemically resistant concrete with crack-healing properties.

Wastewater Collection & Treatment

Chatham Park WWTP


Due to the potentially high levels of H2S in the Bioreactor McKim & Creed, the engineers of record specified the use of a high build acid resistant coating to protect the concrete. Bowen Engineering proposed to the engineers Xypex Bio-San as an alternate to this coating because it contains Xypex’s antimicrobial crystalline technology.

Wastewater Collection & Treatment

Fairchance Sewer Line Extension


Liners or coatings would normally be used to perform this function. As these are expensive and time consuming to install, the engineers decided to specify the inclusion of Xypex Bio-San admixture in the pre-cast concrete.

Wastewater Collection & Treatment

Sonic Sanitary Lift Station & Manholes – Arizona WWTP


The Arizona Lift Station project involved a large cast-in-place wet well and drop/ discharge precast manholes. Xypex Bio-San was incorporated into all cast-in-place concrete and grout in direct or indirect contact with wastewater.

Wastewater Collection & Treatment

American Furniture Manholes


The design team was looking for corrosion protection for the manholes and chose Xypex Bio-San over the alternate antimicrobial admixture. Xypex Bio-San was chosen because it provides the precast sewage elements with protection against microbial induced corrosion and aggressive chemicals, as well as waterproofing and crack healing properties.