METHOCEL™ K4M is a cellulosic gum, a medium viscosity K grade hydroxypropyl methylcellulose (hpmc) thickener.
It will yield a viscosity of 4,000 cP at 2% in water.
It hydrates below 29.5 Celsius (which is rather high for methycel), and actually is lower than pastry room temperature.
K4M has lots of potential for gluten free baking.