LRT-like smart glass, except this is a film that can be installed onto any existing glass :)Google for "smart film"http://www.livingalife.sg/products/privacy_panel.phpBut that needs electricity to toggle. Good for indoor open toilet concept. But for windows and balconies? There's the following alternatives:http://www.windowcool.com/product_l-solar.htmlhttp://www.windowcool.com/product_m-foil.htmlhttp://www.huperoptik.com/en/architectural/residential.aspxhttp://shieldshade.com/products.htmlhttp://www.miracool.com.sg/index.htmlhttp://www.sun-x.com.sg/products.htmlhttp://www.greenbank.com.sg/index.htmhttp://www.sunscreen.com.sg/main.html#/Productshttp://www.coolnlite.com/Features.htm3M Solar Films:it seems the 3M prestige 40 is good.http://solutions.3m.com.sg/wps/portal/3M/en_SG/SG_RE/Home/Products/Residential/WindowFilm/Prestige/http://jestac.com.sg/3m_prestige_window_films.phpor...
