I use less than a quarter size amount of ANYTHING (leave in, moisturizer, styling product etc.) for my whole head! I think that's too much... and I'm not a huge fan of serums, especially thick serums like the one you mentioned. There are other heat protectants that aren't serums and will let your hair be great.
My HG leave in/heat protectant is Its a 10 leave in. I use about mayyybe 4 sprays for my entire head. Anything more is wayyyyy too much, particularly for my fine strands (plus I love light/flowy/swangy hair). I like the Aphogee green tea spray leave in too; I think that's the one
@grownwomanaz might be speaking of?
I know this board makes people heat paranoid
so we start slapping goo gobs of product on our hair in an effort to ward off the demon heat.
Totally not necessary. Good products, good tools, good technique - you're good.
Your issue may be overuse of products, not the product itself. When I use the Joico balm, I only use enough to penetrate my strands. It's not necessary for my fine hair to have a thick coating of product to the point that my hair is white; my hair cant take alladat.
I also know some folks can't take synthetic hair products. If you aren't comfy experimenting then maybe this tool won't work for you. But if it were me, I wouldn't give up if it gave me the results I wanted...
HTH!