Goldwell Kerasilk

there's this particular store along a row of shops that connects lil Tampines Tampines mrt and buses which sells beauty products, including product line square. the most of their stuff is slightly cheaper than salons themselves, and they carry a lot of things, so chances are they could include kerasilk well. if u is through Just look for this particular beauty salon (im sorry i cannot really remember the name), its along the row of shops with a bakery and "this way" Store, it should be enough hard to miss, just walk and see if they have authorized.
Hope that was helpful.