Refractory Coating Colloidal Silica 1 Quart Ceramic Fiber Rigidizer With Stand Temperature : 2300° FahrenheitNormal Curing Time : 24 Hours (Post application). Curing can be accelerated at high temperature.Shelf Life : 6 Months from the date of opening the sealed cap, if immediately restored in the air tight container.Simwool Rigidizer for rigidizing ceramic fiber a.k.a. Ceramic Fiber Hardener, Ceramic Fiber Binding Agent, Ceramic Fiber Anti-Choking Agent, Ceramic Fiber Air Setting Agent, Hardening Agent, is used for increasing the surface hardness of any flexible thermal insulation or refractory product like ceramic fiber blanket. It can be easily applied by spraying, rolling, dipping, or brushing.It is a Refractory Coating for Ceramic Fiber used for increasing the surface hardness of any flexible thermal insulation or refractory product like ceramic fiber blanket. It can be easily applied by spraying, rolling, dipping, or brushing.