Tridol C6 ATF 3-6 LT

3x6% Alcohol Resistant Aqueous Film-Forming Foam - Low Temperature (AR-AFFF-LT)

TridolC6 ATF 3-6 LT is a cost-effective Alcohol Resistant Aqueous Film-Forming Foam (AR-AFFF) concentrate for extinguishing and securing flammable hydrocarbon and polar solvent liquid fires.

TridolC6 ATF 3-6 LT is a unique combination of hydrocarbon and fluorocarbon surface active agents. It produces a vapour-sealing aqueous film that spreads rapidly over hydrocarbon surfaces to provide rapid control and extinguishment. On polar solvents an insoluble polymer membrane is formed which protects the foam blanket from the solvent.

  • Highly versatile and so eliminates the need to stock a variety of foam types.
  • Film-forming on hydrocarbons for fast flame knockdown and extinguishment.
  • Provides burnback resistance and post-fire security.
  • Foam blanket re-seals when ruptured by personnel or equipment.
  • Suitable for use with fresh or sea water.

Performance Approvals

  • Independently tested and certified to EN1568: 2008 Parts 3 & 4.


TridolC6 ATF 3-6 LT is used in high risk situations where hydrocarbons (such as crude oil, gasoline, diesel fuel, aviation kerosene) and/or polar solvents (such as alcohols, ketones, esters, and ethers) are stored, processed, or transported.


TridolC6 ATF 3-6 LT is intended for use at 3% (3 parts concentrate to 97 parts of water) on hydrocarbons and 6% (6 parts concentrate to 94 parts of water) on polar solvents. 

TridolC6 ATF 3-6 LT is readily proportioned using conventional foam proportioning equipment such as portable and fixed foam proportioners at temperatures as low as -15°C (5°F).

TridolC6 ATF 3-6 LT can be used with air aspirating discharge devices such as low expansion branchpipes, monitors, top pourer sets, rimseal foam pourers, foam/water sprinklers, and base (sub-surface) injection systems at temperatures as low as -15°C (5°F).

TridolC6 ATF 3-6 LT can be used with non-aspirating discharge devices such as spray/fog branchpipes and nozzles, monitors, and spray/fog sprinklers. Non-aspirated application is not recommended as the primary method of attack for major fires where a stable foam cover is essential.

Physical Properties                


Light yellow liquid

Specific gravity @ 20°C

1.02 - 1.06

pH @ 20°C

7.0 - 8.0


Non-Newtonian (pseudoplastic)

Viscosity @ 20°C (68°F) using No.4 spindle at 60 rpm (cP)

900 - 2100

Max. continuous storage temp. (°C)


Max. intermittent storage temp. (°C)


Freezing point (°C)


Effect of freeze/thaw

No performance loss

UL lowest use temperature (°C)


Expansion ratio (3% induction) *

≥ 7:1 

25% Drainage time (3% induction) *

≥ 8 mins

Expansion ratio (6% induction) *

≥ 8:1

25% Drainage time (6% induction) *

≥ 15 mins

* Foam generated using the U.K. Defence Standard DEF42-40 5 lpm branchpipe at 7 Bar pressure. Foam collected in a 1630 ml N.F.P.A. drainage pan.


TridolC6 ATF 3-6 LT is suitable for use in combination with:

  • Soft or hard, fresh, brackish or sea water.
  • Dry powder extinguishing agents either separately or as twin agent systems.
  • Expanded protein-based or synthetic foams for application to a fire in sequence or simultaneously.


TridolC6 ATF 3-6 LT is exceptionally stable in long-term storage. A shelf-life of at least ten years can be expected if it is stored properly.


TridolC6 ATF 3-6 LT is produced to rigorous quality control standards to ensure consistent fire performance and excellent product reliability.

Angus Fire operates a quality management system which complies with the requirements of BS EN ISO 9001.

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EN1568 34