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Joico Humidity Blocker Finishing Spray is a lightweight hairspray that helps defend your style from frizz.
This fine mist forms an invisible shield around each strand, helping to repel moisture while keeping your hair soft and touchable. It locks in your finished look without stiffness, giving a flexible hold that still moves naturally.
Hair feels smooth, polished, and less likely to puff up when the weather turns damp. The spray goes on dry, with a light, salon-fresh scent that doesn’t overwhelm.
Perfect for wavy, curly, or straight styles that tend to frizz in humidity. Use as the final step in your routine, before stepping outside or whenever you need a last layer of protection.
How To Use Joico Humidity Blocker Finishing Spray
- Shake well before use.
- Hold can 20–30 cm from dry, styled hair.
- Spray evenly over hair, focusing on outer layers.
- For extra protection, lightly mist underneath sections as well.
- Reapply during the day if humidity is high.
Joico Humidity Blocker Finishing Spray Ingredients
Alcohol Denat., Hydrofluorocarbon 152a, Dimethyl Ether, VA/Butyl Maleate/Isobornyl Acrylate Copolymer, Isobutane, Water/Aqua/Eau, Octylacrylamide/Acrylates/Butylaminoethyl Methacrylate Copolymer, Aminomethyl Propanol, Cyclopentasiloxane, Dimethicone, PEG-12 Dimethicone, Hydrolyzed Keratin, Keratin, Cystine Bis-PG-Propyl Silanetriol, Helianthus Annuus (Sunflower) Seed Oil, Pentaerythrityl Tetracaprylate/Tetracaprate, Octyl Methoxycinnamate, Ethylhexyl Methoxycinnamate, Panthenol, Glycerin, PPG-5-Ceteth-20, Butylene Glycol, Aminopropyl Dimethicone, Fragrance/Parfum, Hexyl Cinnamal, Linalool, Citronellol, Alpha-Isomethyl Ionone, Benzyl Benzoate.
Note: Please refer to bottle for full ingredients.
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Alcohol Denat. SolventsSolvent
A fast-evaporating solvent that helps dissolve ingredients and improve product dry time.
May suitPeople who use styling products that benefit from quick drying or a lightweight feel.
Worth knowingIts quick evaporation can help reduce residue and support a clean finish in styling formulas. Some may notice it can feel slightly drying in leave-in products depending on hair type.
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Hydrofluorocarbon 152a SolventsPropellant
Used as a propellant to help dispense aerosol hair products in a fine, even spray.
May suitThose using aerosol styling products like hairsprays or texture mists.
Worth knowingIt is a common propellant that evaporates quickly, leaving the intended formula on the hair without residue. Its role is purely functional and it does not provide styling or conditioning benefits on its own.
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Dimethyl Ether SolventsPropellant / solvent
Dimethyl Ether is commonly used as a propellant and solvent in aerosol hair products.
May suitThose using aerosol styling products such as hairsprays may encounter this ingredient.
Worth knowingIt helps deliver fine, even sprays and evaporates quickly after application. Its use relates to product format rather than hair type or concerns.
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VA/Butyl Maleate/Isobornyl Acrylate Copolymer Thickeners and stabilisersFilm-forming polymer
A film-forming polymer that helps provide hold, structure and style retention in hair products.
May suitPeople looking for enhanced styling performance, hold, or humidity resistance.
Worth knowingIt is commonly used in gels, mousses and styling sprays to create lightweight, flexible films on the hair. These polymers are widely used in professional styling products for predictable performance.
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Isobutane SolventsPropellant
Isobutane is a gas used to propel product out of aerosol haircare packaging.
May suitUseful for those using spray or mousse formats that rely on aerosol delivery.
Worth knowingIt helps create a fine, even spray and evaporates quickly after application. It does not remain on the hair in meaningful amounts.
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Octylacrylamide/Acrylates/Butylaminoethyl Methacrylate Copolymer Thickeners and stabilisersFilm-forming styling polymer
A film-forming polymer that provides hold, shape retention and humidity resistance in styling products.
May suitPeople looking for longer-lasting style hold or frizz control.
Worth knowingThis polymer is commonly used in gels, sprays and creams to help hairstyles stay in place. It forms a light, flexible film that washes out with regular cleansing.
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Aminomethyl Propanol pH adjusterspH adjuster
Helps adjust and stabilise the pH of haircare formulations.
May suitThose interested in how product pH affects hair and scalp feel may find its presence relevant.
Worth knowingIt is commonly used at low levels to help formulas stay effective and consistent. It does not act on the hair directly but supports the overall product performance.
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Cyclopentasiloxane SiliconesSlip and shine agent
A lightweight silicone that spreads product evenly and gives a silky, fast-absorbing feel.
May suitPeople wanting a light, non-greasy smoothing or shine finish.
Worth knowingOften used in serums and oils for a weightless feel. Some prefer silicone-free options depending on routine.
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Dimethicone SiliconesSlip and shine agent
Smooths the hair surface, adds slip and shine and helps reduce frizz.
May suitFrizz-prone, coarse or dry hair wanting a smooth, glossy finish.
Worth knowingSome people prefer silicone-free formulas, especially for certain curl routines. It is widely used and helpful in many smoothing products.
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PEG-12 Dimethicone SiliconesSilicone-based conditioning agent
A water-dispersible silicone that helps soften hair, add slip and reduce frizz.
May suitPeople looking for smoother, easier-to-detangle hair without a heavy silicone feel.
Worth knowingBecause it is water-dispersible, it tends to rinse out more easily than many traditional silicones. It is commonly used in both rinse-off and leave-in formulas for added manageability.
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Hydrolyzed Keratin Proteins and amino acidsProtein
Helps temporarily support and smooth the hair surface for a stronger feel.
May suitDamaged, chemically treated or fragile hair wanting reinforcement.
Worth knowingProtein routines suit some hair well, while very protein-sensitive hair may prefer balance with moisture.
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Keratin Proteins and amino acidsStrengthening protein
Keratin helps reinforce the hair structure and improve the feel of damaged or weakened strands.
May suitThose with chemically treated, heat‑styled, or fragile hair may find it beneficial.
Worth knowingKeratin used in haircare is typically hydrolysed so it can adhere more easily to the hair surface. It offers cosmetic conditioning benefits rather than permanently altering the internal hair structure.
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Cystine Bis-PG-Propyl Silanetriol Conditioning agentsStrengthening conditioning agent
Helps condition and reinforce the hair fibre for a smoother, stronger feel.
May suitThose looking for support with hair strength, manageability or damage care.
Worth knowingThis ingredient combines a cystine derivative with a silane structure to help improve hair feel and resilience. It is commonly used in modern strengthening and smoothing formulas.
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Helianthus Annuus (Sunflower) Seed Oil Oils and buttersEmollient oil
A plant-derived oil that helps soften and condition the hair and scalp.
May suitThose seeking lightweight natural oils for moisture, shine or scalp comfort.
Worth knowingIt is rich in fatty acids that support hair softness without feeling overly heavy. Often used as a carrier oil in both rinse-off and leave-in formulas.
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Ethylhexyl Methoxycinnamate UV filtersUV filter
A UV-absorbing ingredient that helps protect hair and colour from sun-related fading.
May suitThose who spend time outdoors or want to help maintain colour-treated hair.
Worth knowingIt is widely used in suncare and some hair products to support protection against UV exposure. In haircare, it mainly helps reduce colour fade rather than providing full sunscreen performance.
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Panthenol Conditioning agentsConditioning agent
Helps condition, soften and add a smooth, healthy feel to the hair.
May suitMost hair types, especially dry or dull hair.
Worth knowingA versatile, well-tolerated conditioning ingredient.
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Glycerin HumectantsHumectant
Attracts and holds water to help hair feel hydrated and soft.
May suitDry or dehydrated hair, and many curl and moisture routines.
Worth knowingA very common, well-tolerated humectant used across countless products.
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PPG-5-Ceteth-20 Cleansers / surfactantsSolubiliser / surfactant
A non-ionic surfactant that helps blend oil- and water-based ingredients and improve product texture.
May suitThose using products that need lightweight cleansing or stable, uniform formulations.
Worth knowingIt is commonly used to solubilise fragrance oils and support smooth, consistent formulations. Its mild nature makes it suitable for a wide range of haircare products.
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Butylene Glycol HumectantsHumectant and solvent
Butylene Glycol helps attract and hold moisture while improving the spreadability of hair products.
May suitThose looking for hydrated, smoother-feeling hair or lighter-feeling formulations.
Worth knowingIt is commonly used to help ingredients dissolve and to give formulas a soft, glide-on texture. It appears in many leave-in and rinse-off products due to its versatility.
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Aminopropyl Dimethicone SiliconesConditioning silicone
Aminopropyl Dimethicone is a conditioning silicone that helps smooth and soften the hair.
May suitThose looking for improved slip, reduced frizz, and a smoother finish.
Worth knowingIt is known for its ability to bond lightly to the hair, offering lasting conditioning benefits. It is commonly used in both rinse-off and leave-in products for enhanced manageability.
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Hexyl Cinnamal Fragrance ingredientsFragrance component
A fragrance ingredient used to give products a light, floral scent.
May suitThose who enjoy subtly scented haircare products.
Worth knowingIt is one of the fragrance components that must be listed separately when present above certain levels. People with known fragrance sensitivities may choose to monitor for it.
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Linalool Fragrance ingredientsFragrance component
A fragrance component found naturally in many flowers and spices.
Worth knowingA fragrance component that must be listed separately on labels because a minority of people can be sensitive to it. Its presence is normal, required disclosure and is not a quality signal.
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Citronellol Fragrance ingredientsFragrance component
A fragrance component with a soft floral, rose-like character.
Worth knowingA fragrance component that must be listed separately on labels because a minority of people can be sensitive to it. Its presence is normal, required disclosure and is not a quality signal.
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Alpha-Isomethyl Ionone Fragrance ingredientsFragrance component
A fragrance component with a soft, violet-like character.
Worth knowingA fragrance component that must be listed separately on labels because a minority of people can be sensitive to it. Its presence is normal, required disclosure and is not a quality signal.
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Benzyl Benzoate Fragrance ingredientsFragrance component
A fragrance component that is listed separately on labels by labelling convention.
Worth knowingA fragrance component that must be listed separately on labels because a minority of people can be sensitive to it. Its presence is normal, required disclosure and is not a quality signal.