Svane window soap For washing windows and glass parts. Properties: Gives a nice and glossy surface without streaks. Dosage: approx. 0.5 dl. to 10 liters of water. Content: 15% or more but less than 30%. Anionic surfactants. pH value: Approx. 6.5 pH in concentrated form. Approx. 7.0 pH in 0.5% working solution. Nordic Ecolabel approval: 526 123.