Collagen-Derived Proteins as High-Stability, PFAS-Free Additives in Fire-Fighting Foams

Fire safety is entering a forced transition. Regulators and major end-users are moving away from PFAS-based foams because PFAS persist in the environment (“forever chemicals”), create long-term cleanup liabilities, and are increasingly restricted. The practical need now is clear: PFAS-free foams that still perform on Class B liquid fires (petrol, diesel, solvents, oils) where water alone fails.

Collagen-derived proteins (collagen peptides / hydrolysed proteins) are emerging as a serious, scalable PFAS-free performance additive in foam concentrates. Sourced from natural proteins, they help form a tough, stable foam blanketthat can outperform simple soap-based sprays by staying intact under heat and resisting breakdown.

Why PFAS-Free Foams Need Collagen-Style Stabilizers

A foam does not win by “looking foamy.” It wins by:

• creating a continuous seal over the fuel,
• staying stable under intense radiant heat,
• and maintaining burn-back resistance long enough to prevent re-ignition.

PFAS historically helped with film formation and fuel vapor suppression. In PFAS-free systems, you need other ways to build mechanical strength + seal integrity. This is where collagen-derived proteins are useful: they reinforce the foam structure so it survives heat and maintains coverage.

Key Applications

• Flammable Liquid Suppression (Class B): Forms a persistent “liquid blanket” over fuels, oils, paints, and solvents to stop spread and suppress vapor release.
• Industrial & Storage Safety: Suitable for garages, workshops, chemical stores, and fuel-handling zones where high-heat and re-ignition risk is common—and where PFAS-free compliance is now a procurement requirement.

How Collagen Functions as a Fire-Fighting Additive (Mechanism)

In a foam concentrate, collagen-derived proteins behave like a structural “binder” that upgrades foam stability through four practical effects:

1) Reinforced Bubble Walls

Collagen increases viscosity and film strength, creating reinforced bubbles that resist popping when exposed to heat. This allows a thicker, faster-building foam layer with better coverage.

2) Oxygen Exclusion (The Seal)

The foam forms a dense protein-rich blanket over the burning liquid. This blanket acts as a physical barrier that:

• cuts off oxygen,
• suppresses fuel vapor escape,
• and reduces flame propagation across the liquid surface.

3) Burn-Back Resistance

Collagen-enhanced foam blankets maintain integrity longer under radiant heat, improving burn-back resistance—meaning the fire is less likely to “eat back” through the blanket even when the underlying surface remains very hot.

4) Heat Absorption & Cooling Retention

The protein network helps retain water in the foam matrix against the burning surface. That water acts as a cooling reservoir, lowering surface temperature and reducing the chance of re-ignition after knockdown.