3% x 3% AR-AFFF – C335

CHEMGUARD C335 3×3 AR-AFFF (Alcohol Resistant Aqueous Film-Forming Foam) Concentrate combines fluoro- and hydrocarbon-surfactant technologies to provide superior fire and vapor suppression for Class B, polar solvent and hydrocarbon fuel fires.


CHEMGUARD C335 3×3 AR-AFFF (Alcohol Resistant Aqueous Film-Forming Foam) Concentrate combines fluoro- and hydrocarbon-surfactant technologies to provide superior fire and vapor suppression for Class B, polar solvent and hydrocarbon fuel fires. This synthetic foam concentrate is intended for forceful or gentle firefighting applications at 3% solution for hydrocarbon fuels and gentle firefighting applications at 3% solution for polar solvent fuels in fresh, salt, or hard water.

CHEMGUARD C335 foam solution utilizes three suppression mechanisms intended for rapid fire knockdown and superior burnback resistance:

  • The foam blanket blocks oxygen supply to the fuel.
  • Liquid drains from the foam blanket and forms either:
    • An aqueous film on a hydrocarbon fire, or
    • A polymeric membrane on a polar solvent fire which suppresses the vapor and seals the fuel surface.
  • The water content of the foam solution produces a cooling effect for additional fire suppression.


AppearanceViscous pale amber liquid
Density1.02 ± 0.02 g/ml
pH7.0 – 8.5
Refractive Index1.3525 minimum
Viscosity*1600 ± 300 cPs
Sediment **≤ 0.25%
Spreading Coefficient/td>3 dynes/cm minimum at 3% dilution
Pour Point25 °F (-4 °C)
Freeze Point23 °F (-5 °C)
*Brookefield Viscometer Spindle #4, speed 60 rpm
**EN 1568: 2008 protocol


CHEMGUARD C335 Concentrate is a non-Newtonian fluid that is both pseudoplastic and thixotropic; therefore, dynamic viscosity will decrease as shear increases.

The environmentally-mindful CHEMGUARD C335 3×3 AR-AFFF Concentrate formulation contains short-chain, C-6 fluorochemicals manufactured using a telomer-based process. The telomer process produces no PFOS, and these C-6 materials do not breakdown to yield PFOA. The fluoro-chemicals used in the concentrate meet the goals of the U.S. Environmental Protection Agency 2010/15 PFOA Stewardship Program and the current ECHA Directive (EU) 2017/1000.

Approvals, Listings, and Standards

CHEMGUARD C335 3×3 AR-AFFF Concentrate is designed in accordance with National Fire Protection Association (NFPA) Standard 11 for Low-, Medium-, and High-Expansion Foam. The concentrate is approved, listed, qualified under, or meets the requirements of the following specifications and standards:

  • UL Standard 162, Foam Liquid Concentrates
  • ULC S564, Category 2 Foam Liquid Concentrates
  • EN 1568: 2008
    • Parts 1, 3, 4



CHEMGUARD C335 3×3 AR-AFFF Concentrate is intended for use on both types of Class B fires: hydrocarbon fuels with low water solubility, such as crude oils, gasolines, diesel fuels, and aviation fuels; and polar solvent fuels with appreciable water solubility, such as methyl and ethyl alcohol, acetone, and methyl ethyl ketone.

The concentrate also has excellent wetting properties that can effectively combat Class A fires. It may also be used in conjunction with dry chemical agents to provide even greater fire suppression performance.

CHEMGUARD C335 Concentrate can be ideal for semi-fixed, and emergency response firefighting applications such as:

  • Industrial chemical and petroleum processing facilities
  • Truck/rail loading and unloading facilities
  • Flammable liquid containment areas
  • Mobile equipment

CHEMGUARD C335 3×3 AR-AFFF Concentrate may be effectively applied using most conventional foam discharge equipment at the correct dilution with fresh, salt, or hard water. For optimum performance, water hardness should not exceed 500 ppm expressed as calcium and magnesium.

CHEMGUARD C335 Concentrate requires low energy to foam and the foam solution may be applied with aspirating and non-aspirating discharge devices. Non-aspirating devices, such as handline water fog/stream nozzles, or standard sprinkler heads, typically produce expansion ratios from 2:1 to 4:1.Aspirating low-expansion discharge devices typically produce expansion ratios from 3.5:1 to 10:1, depending on the type of device and the flow rate. Medium-expansion discharge devices typically produce expansion ratios from 20:1 to 60:1.


Proportioning Rate3%
Expansion Ratio≥ 8.0
25% Drain Time (min:sec)≥ 9:00
50% Drain Time (min:sec)≥ 13:30
**per EN 1568-3, 2008 protocol



The recommended operational temperature range for CHEMGUARD C335 3×3 AR-AFFF Concentrate is 35 °F to 120 °F (2 °C to 49 °C) per UL-162. This foam concentrate can be correctly proportioned using most conventional, properly calibrated, in-line proportioning equipment such as:

  • Balanced and in-line balanced pressure pump proportioners
  • Balanced pressure bladder tanks and ratio flow controllers
  • Around-the-pump type proportioners
  • Fixed or portable in-line venturi type proportioners
  • Handline nozzles with fixed eductor/pick-up tubes

For immediate use: The concentrate may also be premixed with fresh or sea water to a 3% solution for hydrocarbon fuel fires or a 3% solution for polar solvent fuel fires.

For delayed use: Consult Technical Services for guidance regarding suitability of a stored pre-mix solution (fresh water only).

Materials of Construction Compatibility

To help avoid corrosion, galvanized pipe and fittings should never be used in contact with undiluted CHEMGUARD C335 3×3 AR-AFFF Concentrate. Refer to Johnson Controls Technical Bulletin “Acceptable Materials of Construction” for recommendations and guidance regarding compatibility of foam concentrate with common materials of construction in the firefighting foam industry.

Storage and Handling

CHEMGUARD C335 3×3 AR-AFFF Concentrate should be stored in the original supplied package (HDPE totes, drums, or pails) or in the recommended foam system equipment as outlined in Johnson Controls Technical Bulletin “Storage of Foam Concentrates.” A thin layer up to 1/4 in. (6 mm) thick of appropriate-grade mineral oil may be applied to the surface of the foam concentrate stored in a fixed, atmospheric storage container to help minimize evaporation. Consult Johnson Controls for further guidance regarding the use of mineral oil to help seal the surface of AR-AFFF concentrates.

The concentrate should be maintained within the recommended operational temperature range. Freezing of the product should be avoided. If, however, the product freezes during transport or storage, it must be thawed and inspected for signs of separation. If separation has occurred, or is suspected, the CHEMGUARD C335 Concentrate should be mechanically mixed until homogeneous, and additional testing may be required after mixing to verify product quality.

Factors affecting the foam concentrate’s long-term effectiveness include temperature exposure and cycling, storage container characteristics, air exposure, evaporation, dilution, and contamination. The effective life of CHEMGUARD C335 Concentrate can be maximized through optimal storage conditions and proper handling. CHEMGUARD foam concentrates have demonstrated effective firefighting performance with contents stored in the original package under proper conditions for more than 10 years.

Mixing CHEMGUARD C335 Concentrate with other foam concentrates for long-term storage is not recommended. Use in conjunction with comparable 3×3 AR-AFFF products for immediate incident response is appropriate.


CHEMGUARD C335 3×3 AR-AFFF Concentrate should be inspected periodically in accordance with NFPA 11, EN 13565-2, or other relevant standard. A representative concentrate sample should be sent to Johnson Controls Foam Analytical Services or other qualified laboratory for quality analysis per the applicable standard. An annual inspection and sample analysis is typically sufficient, unless the product has been exposed to unusual conditions.

Ordering Information

CHEMGUARD C335 3×3 AR-AFFF Concentrate is available in pails, drums, totes, or bulk shipment.

Parts No.DescriptionApproximate Shipping Weight
7041645 gal (19 L)45 lb (20.4 kg)
704164E5 gal (19 L)45 lb (20.4 kg)
70416555 gal (208 L)495 lb (224.5 kg)
704165E55 gal (208 L)495 lb (224.5 kg)
704166265 gal (1,003 L)2,463 lb (1,117 kg)
704166E265 gal (1,003 L)2,463 lb (1,117 kg)
704167320 gal (1,211 L)2,963 lb (1,344 kg)
For bulk orders, contact an account representative.
*Totes are not UL/ULC approved packaging.

Note: The converted unit values in this document are provided for dimensional reference only and do not reflect an actual measurement.
CHEMGUARD and the product names listed in this material are marks and/or registered marks. Unauthorized use is strictly prohibited.





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