With low porosity hair you may find that you don't need to use cool water to seal the hair shaft. I never do because then I can't let my gel soak in. When I diffuse my hair I will do a blast of cool air to seal, but that's always after I have my product in.

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MBL just trying to see how long I can get it
Low porosity, very high density and coarse.
Still playing to find the perfect product.