SKUM ARC 3X3 EG is a 3%x3% AR-AFFF concentrate, an alcohol resistant aqueous film-forming foam, described in a Johnson Controls data sheet. It is used at 3% on hydrocarbon fuels, forcefully or gently, and at 3% on polar solvent fuels, gently, with fresh, salt or hard water. At 20 C density is 1.05 + 0.02 g/ml, pH is 7.0 to 8.5 and refractive index is at least 1.3680. Viscosity is 2,300 +/- 300 cPs on a Brookfield viscometer with spindle 4 at 60 rpm.
The storage and operating range runs from -13 C to 60 C, the pour point is at most -15 C and the freeze point at most -18 C, while the diluted solution freezes at 0 C. Typical foam characteristics in fresh and salt water per EN 1568-3:2008 are an expansion ratio above 8.0, a 25% drain time above 8:00 minutes and a 50% drain time above 12:00 minutes. The sheet lists EN 1568:2008 parts 1 to 4, ICAO Level B, IMO MSC.1/Circ. 1312 and MED Modules B and D. It is intended for both Class B fire types, namely low water solubility hydrocarbons such as crude oil, gasoline, diesel and aviation fuel, and polar solvents such as alcohols, acetone and methyl ethyl ketone. Named uses include helipad systems, docks and on-board marine systems.
Seawater or fresh water may be used to prepare a 3% pre-mix for immediate use. Galvanized pipe and fittings should not touch the undiluted concentrate. It should be stored in its original package, and a mineral oil layer up to 6 mm thick may be applied in a fixed atmospheric tank to reduce evaporation. An annual inspection with sample analysis per NFPA 11 or EN 13565-2 is typically sufficient. The 20 L pail is part F113193C2 at 22.1 kg shipping weight, and the 25 L pail is F113193C1 at 27.45 kg. The 200 L drum is F113193D1 at 218.5 kg, and the 1,000 L tote is F113193T1 at 1,110 kg.
Sources: Johnson Controls datasheet SKUM ARC 3x3 EG, checked 05.10.2026