Solaris PG20 Physical Properties


1.02 - 1.15 g/cm³ depending on inhibitors


7.5 - 10.5 depending on inhibitors

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.


For a quote or assistance

Tel: (021) 385 0908

Ready-To-Use Non-Toxic Extreme Temperature Rated Heat Transfer Fluid with Antifreeze. Based on Propylene Glycol and Reversibly Evaporable Inhibitors to prevent corrosion, scaling and biological fouling.

Solaris PG20 has been especially formulated for use Solar Thermal Heating Systems. It is able to operate efficiently at 170°C for prolonged periods and withstand temperatures of 200°C for short periods. It contains reversibly evaporable inhibitors that are capable of withstanding stagnation temperatures of 300°C whilst protecting all metals used in Solar Thermal Heating Systems.

Antifreeze AntiFreeze

Solaris PGC20 Protects Solar Thermal Heating Systems down to -20°C.

non toxic Non-Toxic

Solaris PG20 has an LD50 toxicity rating (Oral Rat) of ≥15,000 mg/kg of body weight (bw) = “Relatively Harmless”. As confirmed by the Hodge & Sterner Scale.

Corrosion control Corrosion Control

Solaris PG20 has been tested in accordance with BS5117 procedures and found to meet BS6580 and ASTM D1384 corrosion limits.

Solaris PG20 also contains a high temperature rated polyacrylate, formulated to prevent sludge precipitation and scale formation. Thus promoting long operational life and high thermal efficiency.

Biodegradable Biodegradable

Solaris PG20 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.

Solaris PG20 is a Ready-To-Use Heat Transfer Fluid that will provide freeze protection down to -20°C. In order to maintain system integrity only top-up with Solaris PG20.

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.

back to all Solaris fluids