To keep black streaks away for 3-6 months, dip a soft bristled tooth brush in some Fenwicks Black Streak Remover 1 Litre and gently scrub the rubber seals around windows, hatches and gutters, being careful not to scratch the windows, this will create a lot of black run off, don't worry it is only the oxidised rubber that creates black streaks, repeat process until the run off is clear.
How to use Fenwicks Black Streak Remover
- Apply to surfaces from top to bottom.
- Allow 1 to 2 minutes to soak in, but do not allow to dry.
- Agitate witha sponge or soft brush.
- Rinse thoroughly with water from top to bottom. For a showroom finish just add Fenwicks Bobby Dazzler to the rinse water.