It can be used on any type of material: raw or treated teak, plastic, fiberglass, sky, textiles, etc.. ‣ Push repeatedly the nozze to get enough foam to cover the area to be cleaned. ‣ Lightly rub the instant teak cleaner with a soft brush to allow the foam to. ‣ Leave for at least 2-3 minutes, then remove with a damp sponge. If necessary repeat the cycle.If the surface to treat, not in teak, is coloured test a small inconspicuous area first before treatment. Any colour change on the teak can be removed by a subsequent treatment with TEAK WONDER® CLEANER and TEAK WONDER® BRIGHTENER. Do not apply on hot surfaces or in direct sunlight. Do not leave foam to dry without removing residue with a damp sponge.