Relaxers don't need to be refrigerated. They last years. I don't know if there is any actual science behind the practise of putting them in the fridge...on the bodybuilding sites, they call things like this that we do because we heard about it somewhere "bro science" lol.
Dr Ali Sayed is the business when it comes to ethnic hair-care science in particular. I go to his site a lot. He works for Keracare I think, but he talks sense about a lot of ingredients & products. He doesn't pimp Keracare in every post.
The link has a long list of the expiration dates & storage info of all the different types of hair products you can think of. He doesn't mention anything about keeping relaxers in the fridge. He says event the worst type of relaxer can survive 6 months. I think I'll post the whole list in Growth in a minute.
Shelf Life: 1 to 1.5 years (Sodium Hydroxide) aka LYE
2 years (Guanidine Hydroxide) aka No lye/box/those that need to be mixed
Of the most widely used relaxers, those formulated with sodium hydroxide are the most challenging to formulate. An improperly formulated relaxer can have a shelf life of six months or less. Well developed formulas will work effective for up to a year and a half.
Guanidine hydroxide relaxers are a little easier to stabilize from a product development standpoint, and can be effectively used for up to two years. (If the creme portion of the relaxer system seems a bit dry on the upper surface, do not assume that the product is beyond '" shelf life. This is characteristic of relaxers in this category, which contain