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ARC 3x3 S

Fomtec ARC 3x3 S is high efficiency multi purpose film forming foam (3x3) that is PFOS free. Fomtec ARC 3x3 S shall be used at 3% induction ratio on both hydrocarbon and polar solvents fires using fresh, brackish or seawater. The film forming characteristics of Fomtec ARC 3x3 S means that it spreads rapidly across a fire. As a result, it is highly effective against hydrocarbon fires and with the addition of special polymers it is also highly effective against polar solvents. The low surface tension of the water foam concentrate solution enables the aqueous film, although heavier than the burning liquid, to float on top of the hydrocarbon liquid surface. When applied on polar solvents a polymeric membrane makes it possible for the foam blanket to extinguish effectively. This works on foam destroying liquids such as pure MTBE or Gasoline mixed with MTBE. Fomtec ARC 3x3 S should be used at 3% proportioned solution.


Fomtec ARC 3x3 S is intended for use on class B hydrocarbon fuel as well as on polar solvent i.e Isopropanol, Methanol etc and other foam destroy-ing product fires such as MTBE. It can be used with both aspirating and non-aspirating discharge devices. It is compatible with all dry chemical powders.

Fire Performance & Foaming

Fomtec ARC 3x3 S has been designed to give the best properties of:

  • Aqueous film forming foam
  • Alcohol resistant foam

The fire performance of this product has been measured and documented according to "International Approvals" stated in this document. The foaming properties are depending on equipment used and other variables such as water and ambient temperatures. Average expansion 7:1, average ¼ drainage time 08:30 minutes using UNI 86 test nozzle.


Fomtec ARC 3x3 S can easily be proportioned at the correct dilution using conventional equipment such as:

  • Inline inductors
  • Balanced pressure, variable flow proportioning systems
  • Bladder tanks
  • Around the pump proportioning systems
  • Water turbine driven foam proportioners
  • Self inducting branch pipes and nozzles

The equipment should be designed to the foam type.

Sprinkler application

Fomtec ARC 3x3 S has been tested according to the Underwriters Laboratories Standard UL 162 using standard sprinkler heads K 80 and K115. Sprinkler applications are especially challenging for any foam due to the very low operating pressure and the very low expansion reached. Applying foam through a sprinkler head is a very forceful application method and requires foam that can handle direct application and partial submersion into the fuel without losing fire performance and burnback resistance.
Foams that shall be regarded as suitable for Sprinkler applications shall also be able to withstand limited time of water deluge directly onto the foam blanket without losing burnback properties. This test is performed on the foam during the Heptane test. Fomtec ARC 3x3 S has passed these tests showing very good extinguishing and burnback properties.

The fire performance of Fomtec ARC 3x3 S has been tested according to UL 162 7th edition using type II and type III discharge outlets. The Fomtec ARC 3x3 S is ideal for all High-risk applications where any type of discharge outlet may be in use such as:

  • Petrochemical and chemical plants
  • Offshore installations
  • Oil and Chemical tankers
  • Tank Farms
  • Warehouses


Contact one of the Fomtec sales team with questions.

Technical data


Clear yellowish liquid

Specific gravity at 20°C

1,030 +/- 0.02 g/ml

Viscosity at 20°C

2400 mPas +/- 300


5,8 – 6,8

Freezing point


Recommended storage temperature

0 - 55°C

UL-listed storage temperature*

1,7 - 49°C

Suspended sediment (v/v)

Less than 0,2%

Surface tension

≤ 19,0 mN/m

*This product is tested according to UL-standard and has passed the specific circumstances in the test. 

Environmental impact

Fomtec ARC 3x3 S is formulated using specially selected raw materials, selected for their fire performance and their environmental profile. Fomtec ARC 3x3 S is biodegradable. The handling of spill of concentrate or foam solutions shall how ever be made according to local regulations. Normally sewage systems will have no problem with a 3% foam solution based on Fomtec ARC 3x3 S, but local sewage operators should be consulted in this respect. This product contains NO PFOS or PFOA.

Full details will be found in the Material Safety Datasheet (MSDS).

Storage / Shelf life

Stored in original unbroken packaging the product will have a long shelf life. Shelf life in excess of 10 years will be found in temperate climates. As with all foams, shelf life will be dependent on storage temperatures and conditions. If the product is frozen during storage or transport, thawing will render the product completely usable.
Synthetic foam concentrates should only be stored in stainless steel or plastic containers. Since electrochemical corrosion can occur at joints between different metals when they are in contact with foam concentrate, only one type of metal should be used for pipelines, fittings, pumps, and tanks employed in the storage of foam concentrates. We recommend following our guidelines for storage and handling ensuring favourable storage conditions.


We supply this product in 25 litre cans and 200 litre drums. We can also ship in 1000 litre containers or in bulk.

Litres per piece


Part no

25 litres



200 litres



1000 litres




Special request


International Approvals

  • Underwriters Laboratories, UL 162 7th edition
  • ULC listed
  • Factory Mutual (FM) 5130

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