Respondol ATF 3-3

Alcohol Resistant Fluorine Free (FF) Foam Concentrate

Respondol ATF 3-3 is a superior quality 3% synthetic fluorine free (F3) foam concentrate, designed for extinguishing and securing all types of flammable liquid fires and Class A incidents.

Respondol ATF 3-3 has been designed specifically for emergency responders who are faced with a variety of risks in a range of situations.

Respondol ATF 3-3 is a patented combination of surfactants and other ingredients to produce a vapour sealing blanket of foam that rapidly spreads over the surface of the fuel to provide rapid control and extinguishment.

  • Unique patented formulation only available from Angus Fire.
  • Specifically designed for those emergency responders under environmental pressures.
  • Approved to EN1568 part 3 and 4 on all fuels and all water types.
  • UL listing and Lastfire.
  • Independently GreenScreen Certified to Silver.
  • Low viscosity allows easy induction.
  • Suitable for use with fresh and sea water.
  • 100% biodegradable.

Performance Approvals

  • Respondol ATF 3-3 is independently tested and certified to EN1568:2008 parts 3 and 4. Performance exceeds the requirements of these tests.
  • Audited and approved to Underwriters Laboratories UL162 (7th Edition). 
  • Passed Lastfire with excellent results in fresh and sea water.
  • Meets the requirements and certified to IMO MSC.1/Circ.1312.
  • Fully GreenScreen Certified to Silver.


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

Respondol ATF 3-3 provides a vapour suppressing foam blanket on unignited hydrocarbon spills.

Can also be used as a wetting agent in combating fires in Class A materials such as wood, paper, and tyres.


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

It is readily proportioned using conventional foam proportioning equipment such as portable and fixed (in-line) foam venturi proportioners. 

Respondol ATF 3-3 should be used with air aspirating discharge devices such as low expansion branchpipes and other devices.

Physical Properties                


Light yellow liquid

Specific gravity @ 20°C

1.00 – 1.04

pH @ 20°C

7 - 8

Viscosity (cP)


Max. continuous storage temp. (°C)


Max. intermittent storage temp. (°C) 


Freezing point


Effect of freeze/thaw 

No performance loss

Lowest use temperature (°C)


Expansion ratio*

≥ 7:1 

25% drainage time*

≥ 1 hour



* 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.


Respondol ATF 3-3 is suitable for use in combination with:

  • Soft or hard, fresh, brackish or sea water.
  • Expanded protein-based or synthetic foams for application to a fire in sequence or simultaneously.


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


Respondol ATF 3-3 is 100% biodegradable and is manufactured without any added fluorinated surfactants or fluorinated polymers.

GreenScreen Certified shows a complete assessment of the formulation, including impurities, has been conducted to assess impact on over 20 end-points. Visit www.greenscreenchemicals.org for more information.

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UL 162 EN1568 34 LASTFIRE IMO Fluorine Free greenscreen certified