Trainol 6 / Trainol 3

Trainol 6 and Trainol 3 are fluorine-free training foam concentrates (TF class) developed by Angus Fire specifically for the aviation sector. Trainol 6 operates at 6% and is formulated to mimic the induction and proportioning behaviour of Angus TridolC6 S6 AFFF — the long-standing industry benchmark for 6% aviation foam. Trainol 3 operates at 3% and mirrors the characteristics of Angus Tridol S AFFF, the 3% equivalent. Both products replicate the foam output and flow properties of their AFFF counterparts closely enough for use in routine crew training exercises, equipment commissioning, and vehicle foam-system testing without exposing the environment to PFAS-containing AFFF.

The training foam use case is operationally significant because airports are required to conduct regular ARFF crew exercises under CAA and ICAO mandates, and ARFF vehicles must be periodically tested to verify proportioner calibration and nozzle performance. Historically these exercises consumed operational AFFF, depositing PFAS into ground and surface water. Trainol removes that environmental liability while maintaining exercise fidelity: both products have virtually identical induction characteristics to their AFFF analogues, so crews train on the system behaviour they will encounter in a real incident.

Both variants are yellow-coded to prevent confusion with operational concentrates and must not be used on real fires. Shelf life is 2 years from purchase — intentionally short to ensure training stock is replaced before degradation and to prevent stockpiling that could be mistaken for operational foam. Physical properties: specific gravity 1.00–1.02 (Trainol 6) / >1.01 (Trainol 3), viscosity approximately 1–3 mm²/s, pH 7.5–8.5. Both are readily biodegradable, free of fluorosurfactants and glycol ethers, and compliant with Civil Aviation and Environment Agency regulatory requirements.