I do not normally heat style my hair, so I am unable to vouch if this was an effective product to use against damage due to heat exposure.

What I do use it for was to smooth and add shine to my hair when needed. In that aspect, it works as expected, and adds a nice distinctive scent that all of the other Biolage products have. It did not have enough hold to keep away the flyaways in the winter, so it worked the best during the warmer weather.

One bottle had lasted me for about 3 years on my long hair - and will continue to last me another two years or so. No signs of obvious deterioration, fortunately.

(I received this as a part of a giveway from the company. It is pricey for what it was, considering that there were plenty of effective silicone based glosses that were a fraction of the price and provided the same results.)

I constantly looking for a product that not only smooths my hair due to my daily heat appliance tools but also protects it as I use them. Luckily Matrix Biolage has listened and created a product just for us ladies that protects our hair from the daily grind of heat products such as blow drying, straightening. Crimping. Waving and curling.
I have tried many products that claim to protect and beautiful hair while using thermal products however they failed to deliver and many times my hair was left frizzy and frayed and far from shiny other than at the roots from my over brushing in attempts to smooth my tresses.
This product is so easy to apply after washing and drying your hair and before straightening and leaves your hair fly away free, shiny and glossy looking as it did when I first got my style at the salon. I am very satisfied with this product!