Tridol C6 ATF C 3-6

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

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

TridolC6 ATF C 3-6 contains a combination of hydrocarbon and fluorocarbon surface active agents. It produces a vapoursealing aqueous film that spreads over hydrocarbon fuels to provide rapid control and extinguishment. On polar solvents an insoluble polymer membrane is formed which protects the foam blanket from the destructive effects of the solvent.

  • Versatile, eliminating the need to stock a variety of foam types.
  • Film-forming on hydrocarbons.
  • Good burnback resistance and postfire security.
  • Foam blanket re-seals when ruptured by personnel or equipment.

Performance Approvals

  • Independently tested and certified to EN1568: 2008 part 3&4.
  • Passed Lastfire in fresh and sea water.
  • Audited and approved to Underwriters Laboratories UL162 (7th Edition).

Environmental Impact 

TridolC6 ATF C 3-6 is formulated only with telomer-based fluorocarbon surfactants.


TridolC6 ATF C 3-6 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.

Typical applications include hydrocarbon storage tanks, process areas,warehouses, road/rail loading racks, power stations, marine terminals, and offshore platforms.


TridolC6 ATF C 3-6 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 C 3-6 is readily proportioned using conventional foam proportioning equipment such as portable and fixed (in-line) foam venturi proportioners, handline nozzles / branchpipes with pick-up tubes, balanced pressure variable flow proportioners, balanced pressure bladder tank proportioners, and around-the-pump proportioners.

TridolC6 ATF C 3-6 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. It 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


Amber liquid

Specific gravity @ 20°C

1.00 - 1.04

pH @ 20°C

6.3 - 7.3


Non-Newtonian (pseudoplastic)

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

1400 - 2600

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 (6% induction) *

≥ 8:1

25% Drainage time (6% induction) *

≥ 15 minutes

* 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.

Additional Information

For additional information on fire fighting foam concentrates including C6 foams, foam testing, compatibility, shelf life and pack sizes, please refer to our FAQs section.

Back to top
UL listed UL 162 EN1568 34 LASTFIRE EPA 2015 compliant