In fluid thermodynamics, a heat transfer fluid is a gas or liquid that takes part in heat transfer by serving as an intermediary in cooling on one side of a process, transporting and storing thermal energy, and heating on another side of a process.
Trusted by Leading Chandlers
Proven across the marine industry, Safeguard’s non-toxic antifreeze delivers reliable protection for water systems and engines during winter storage.
Formulated to be safe for copper, brass, and all types of plastic, Safeguard winterising fluids feature advanced multi-metal and multi-function inhibitors.
These additives help prevent internal corrosion, scale build-up, and biological fouling—without harming rubber, hoses, or gasket materials.
Summary – Rating: A
Suitable for toilets, wastewater systems and engines storage in all marine craft.
Antifreeze – Rating: A
Provides freeze protection down to -46°C and burst protection down to -73°C.
Biodegradability – Rating: A
Are readily biodegradable (90% over ten days) and will not remain in the environment or bio-accumulate.
Corrosion Control – Rating: A
Safe for aluminium, copper, brass and all types of plastic. The inhibitor formulation will not damage rubber, hose or gasket materials.
Toxicity – Rating: A
Classified as Non-Toxic. Suitable for any systems where low-toxicity is stipulated. LD50 Oral Rat >20,000mg/kg body weight.
When measuring the percentage concentration of Safeguard Marine in solution we recommend the use of a recently calibrated refractometer.
| Freeze Point | Burst Protection PVC | Burst Protection Copper | v/v of Safeguard Marine Trade % | Refractive Index |
|---|---|---|---|---|
| -5 | -15 | -38 | 12.0 | 1.34530 |
| -11 | -23 | -46 | 21.0 | 1.35490 |
| -23 | -35 | -57 | 33.0 | 1.36850 |
| -34 | -48 | -65 | 42.0 | 1.37750 |
| -46 | -62 | -73 | 50.0 | 1.38580 |
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