What's the noun for rigidifiers? Here's the word you're looking for.
rigidity
The quality or state of being rigid; want of pliability; the quality of resisting change of form; the amount of resistance with which a body opposes change of form.
In Economics: synonym for stickiness (of prices/wages etc.). Describing the tendency of prices and money wages to adjust to changes in the economy with a certain delay.
“The main advantage is the rigidity of the material, which prevents collapse and flattening of the graft during vertical ridge augmentation.”
“This condition consists in rigidity and inelasticity of the walls of the vessel, with or without dilatation.”
“The rigidity of his attitude is plainly indicated in his dealings with other people whose sole function is to give substance to this idealized image of himself as an all-conquering Don Juan.”
“Granted the resources of rigidification and the thinkability of any actual object, the scope of general thought seems to have no obvious limits.”
“It is a property of networks to rigidity and of the critical reader to become the reluctant agent of rigidification.”
“It therefore involved a confirmation, crystallization, and rigidification of the preexisting implicit boundaries of a white national identity and belonging.”