{"product_id":"kerastase-heat-protecting-leave-in-cream-extentioniste-thermique-strengthens-seals-split-ends-450-f-shield","title":"KÉRASTASE Heat-Protecting Leave-In Cream Extentioniste Thermique — Strengthens, Seals Split Ends, 450°F Shield","description":"\u003cp\u003e\u003cstrong\u003eKÉRASTASE Resistance Extentioniste Thermique is a leave-in, heat-protecting cream that reinforces weakened mid-lengths and ends while sealing split ends for smoother, stronger hair.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis lightweight primer is designed to be applied to damp hair before blow-drying or heat styling. It combines a targeted amino-acid derivative with ceramides and taurine to support fiber resilience, improve manageability, and create a thermal shield up to 450°F. Use it as part of the Resistance Extentioniste routine to reduce breakage and help hair reach healthier lengths.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this primer protect hair during heat styling?\u003c\/h3\u003e\n\u003cp\u003eThe formula forms a protective barrier that reduces mechanical and thermal stress when blow-drying or using hot tools. Rather than masking damage, it helps strengthen the fiber while limiting further breakage during styling.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThermo-protection rated to 450°F to defend against heat exposure.\u003c\/li\u003e\n  \u003cli\u003eLightweight cream spreads evenly on mid-lengths and ends without weighing hair down.\u003c\/li\u003e\n  \u003cli\u003eSeals split ends to reduce friction and breakage during combing and styling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat ingredients reinforce hair structure and why do they matter?\u003c\/h3\u003e\n\u003cp\u003eKey actives work together to bolster the hair’s internal structure and surface. Creatine R (an amino-acid based complex) supports fiber integrity, while ceramides restore surface cohesion and taurine contributes to resilience.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCreatine R: supports internal fiber reinforcement for reduced breakage.\u003c\/li\u003e\n  \u003cli\u003eCeramides: improve cuticle cohesion and enhance shine.\u003c\/li\u003e\n  \u003cli\u003eTaurine: helps maintain elasticity and moisture balance along lengths.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use Extentioniste Thermique for best results?\u003c\/h3\u003e\n\u003cp\u003eWork a quarter-sized amount through towel-dried hair, concentrating on mid-lengths and ends where damage is most common. Follow with blow-drying or thermal styling as desired; regular use with the Extentioniste shampoo and conditioner maximizes strengthening benefits.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eApply to damp hair—do not rinse out.\u003c\/li\u003e\n  \u003cli\u003eFocus product from mid-length to ends, avoiding the roots for lightness.\u003c\/li\u003e\n  \u003cli\u003eUse alongside Extentioniste shampoo and conditioner for a complete regimen.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this product help with split ends and everyday breakage?\u003c\/h3\u003e\n\u003cp\u003eExtentioniste Thermique helps to temporarily seal split ends and reduce immediate breakage during styling, making hair appear smoother and less prone to snap. It supports longer-term strength when used consistently with the Resistance collection but does not replace trimming for advanced split ends.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSeals and smooths split ends to reduce visible fraying.\u003c\/li\u003e\n  \u003cli\u003eDecreases breakage from blow-drying by up to 90% in controlled tests when used as directed.*\u003c\/li\u003e\n  \u003cli\u003eImproves manageability and shine between salon cuts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: KÉRASTASE Resistance Extentioniste Thermique is formulated for weakened hair that struggles to retain length—ideal for anyone with mid-length damage, frequent heat styling, or visible split ends who wants a protective, strengthening leave-in primer. It suits most hair types except those needing oil-heavy care at the roots; use sparingly near the scalp to avoid weighing fine hair down.\u003c\/p\u003e\n\u003ch3\u003eIngredients\u003c\/h3\u003e\n\u003cp\u003eWater, Isopropyl Myristate, Dimethicone, Triethanolamine, Amodimethicone, Phenoxyethanol, Carbomer, Polyquaternium-4, Potato Starch Modified, Hydroxypropyl Guar, Behentrimonium Chloride, Trideceth-6, Amyl Cinnamal, Hexyl Cinnamal, Isopropyl Alcohol, Benzyl Alcohol, Linalool, Hydroxycitronellal, Cetrimonium Chloride, Citronellol, Limonene, Benzyl Cinnamate, Creatine, 2-Oleamido-1,3-Octadecanediol, Taurine, Parfum, Fragrance.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use Extentioniste Thermique on colored hair?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It’s safe on color-treated hair and helps protect against heat-related color fading when used before styling.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I apply the leave-in primer?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Apply to damp hair each time you heat-style or blow-dry; use daily for best results in reducing breakage and sealing ends.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"KÉRASTASE","offers":[{"title":"Default Title","offer_id":49619507740810,"sku":"B07Q7S1R8X","price":142.41,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/4825\/6394\/files\/kerastase-extentioniste-thermique-front-bottle.jpg?v=1782831786","url":"https:\/\/auviraskincare.com\/products\/kerastase-heat-protecting-leave-in-cream-extentioniste-thermique-strengthens-seals-split-ends-450-f-shield","provider":"Auvira Beauty","version":"1.0","type":"link"}