BioTherm BE2 Physical Properties


1.07 g/cm³



Boiling Point:



a clear, slightly viscous liquid. It is mildly sweet to the taste and has a non-pungent but characteristic aroma.

Available in:

5, 10, 15, 20, 25, 205 & 1000 litre containers and bulk tankers.


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Tel: +44 (0) 1792 586800

Industrial Heat Transfer Fluid with Antifreeze. Based on Ethylene Glycol and BS6580 & ASTM D1384 High Temperature Rated Inhibitors for Biomass Heating Systems.

BioTherm BE2 has been especially formulated for use as an industrial grade heat transfer fluid for use in Biomass Heating Systems.

Antifreeze AntiFreeze

BioTherm BE2 is miscible with water in all proportions and can protect Biomass Water Heating Systems down to -50°C depending on concentration.

Optimum Flow Optimum Flow

BioTherm BE2 has improved heat transfer characteristics. Including lower Dynamic Viscosity and higher Thermal Conductivity. Performance curves are available upon request.

Corrosion control Corrosion Control

BioTherm BE2 contains synergistic corrosion inhibitors to protect metals commonly found in such systems. It has been tested in accordance with BS5117 and found to meet BS6580 and ASTM D1384 corrosion standards.

BioTherm BE2 also contains scale and biological inhibitors to help prevent fouling – thus promoting long operational life and high thermal efficiency.

Biodegradable Biodegradable

BioTherm BE2 mixtures are readily biodegradable (90% over ten days) and will not remain in the environment or bio-accumulate.

Quality Assured Quality Assured

All Hydratech products are manufactured in accordance with certified ISO9001-2008 procedures


As per BSRIA guide BG 29/2012 all pipe-work systems should be clean and free from biological contamination and debris prior to commissioning.

To minimise corrosion air ingress should be minimized. A pressurised system is best.

Determine the total system volume and add BioTherm BE2 to the system according to the minimum operating temperature required (see table). The minimum dose of BioTherm BE2 should not be less than 20% of the system volume and the maximum does not normally exceed 60%. We recommend the use of deionised, distilled or UltraPure™ water for this dilution. Avoid water containing high levels of calcium salts or Chlorides [Cl-].

Health & Safety: Please refer to the associated Safety Data Sheet - Available via Login or upon request.

Shelf Life: 3 years when stored in sealed containers out of direct sunlight.

Available in: 5, 10, 15, 20, 25, 205 & 1000 litre containers and bulk tankers.

BioTherm BE2 can also be supplied as a Ready-To-Use solution.

Mixing Guide

Frost Protection °C v/v of BioTherm BE2 Refractive Index
-10 20% 1.349
-15 27% 1.355
-20 32% 1.359
-25 37% 1.363
-30 41% 1.366
-35 45% 1.369

When measuring the percentage of BioTherm BE2 in the system use a refractometer

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