Blue Mud Mask

Boí Thermal

Where to buy Possibly in stock

About this product

The Boí Thermal Blue Mud Mask is a wash-off mask. Our analysis of its 29 ingredients (25 low-risk) rates it Excellent (100/100). Heads up: it contains fragrance, which can irritate sensitive or reactive skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Wash-Off Mask
Ingredients
29
Low-risk
25
Fragrance
Contains fragrance
Origin
Spain
Data updated
May 2026

The evidence

Quick Product Notes

Paraben-Free Sulfate-Free Alcohol-Free Silicone-Free EU Allergen-Free Fungal Acne (Malassezia) Safe

Notable Effects & Ingredients

No Notable Effects & Ingredients

Ingredients Related to Skin Types

Good   Bad — tap a skin type to see which ingredients · estimated from ingredient functions
Dry Skin 8/9
Good for dry skin
Glyceryl Caprylate Aluminum Hydroxide Caprylic/Capric Triglyceride Sodium Hyaluronate Glycerin Hydrogenated Ethylhexyl Olivate Hydrogenated Olive Oil Unsaponifiables Jojoba Esters
Caution for dry skin
Glyceryl Caprylate Disodium Stearoyl Glutamate Sorbitan Oleate Xanthan Gum Kaolin Caprylyl/Capryl Glucoside Glycerin Polyglyceryl-4 Laurate/Succinate Hectorite
Oily/Acne-Prone Skin No data
Sensitive Skin 4/6
Good for sensitive skin
Aluminum Hydroxide Kaolin Glycerin Jojoba Esters
Caution for sensitive skin
Levulinic Acid Sorbitan Oleate Caprylic/Capric Triglyceride Glycerin Citric Acid Sodium Benzoate

Ingredients list

29 total
Lower hazard (1) Higher hazard (3)
All29 Skin Conditioning19 Fragrance7 Emollient6 Solvent5 Surfactant4 Viscosity Controlling4 Humectant4 Hair Conditioning4
EWG CIR Ingredient Name & Cosmetic Functions Notes
1
Water
(Solvent)
1
A
Kaolin
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Skin Protecting, Slip Modifier)
1
A
Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, Solvent)
2
A
Glycerin
(Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care Agent, Oral Health Care Drug, Skin Protecting, Viscosity Decreasing Agent, Perfuming, Solvent)
Good for Dry Skin
Good for Dry Skin
Fungal Acne
Fungal Acne Trigger
1
Propanediol
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling)
1
Polyglyceryl-4 Laurate/Succinate
(Emulsifying, Surfactant)
1
A
Pentylene Glycol
(Skin Conditioning, Solvent)
2
A
Hectorite
(Absorbent, Bulking Agent, Opacifying, Suspending Agent Nonsurfactant, Viscosityincreasing Agent Aqueous, Viscosity Controlling)
1
A
Sorbitan Oleate
(Fragrance, Emulsifying, Surfactant)
Bad for Oily Skin
Bad for Oily Skin
Fungal Acne
Fungal Acne Trigger
1
B
Hydrogenated Ethylhexyl Olivate
(Emollient, Skin Conditioning)
1
Caprylyl/Capryl Glucoside
(Cleansing, Foaming, Surfactant)
1
Levulinic Acid
(Fragrance, Skin Conditioning, Perfuming)
1
Vaccinium Myrtillus Fruit Extract
(Skin Conditioning)
Salvia Sclarea Extract
(Anti Sebum, Astringent, Skin Conditioning, Soothing)
1
Sodium Sorbate
(Preservative)
1
A
Jojoba Esters
(Emollient, Moisturising, Skin Conditioning, Soothing)
1
A
Sodium Hyaluronate
(Skin Conditioning, Humectant)
Good for Dry Skin
Good for Dry Skin
Polyepsilon-Lysine
(Hair Conditioning, Skin Conditioning)
2
A
Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking)
Bad for Sensitive Skin
Bad for Sensitive Skin
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning)
1
3
Titanium/Titanium Dioxide
(Cosmetic Colorant, Opacifying)
1
A
Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling)
1
A
Hydrogenated Olive Oil Unsaponifiables
(Hair Conditioning, Skin Conditioning, Emollient)
1
A
Glyceryl Caprylate
(Skin Conditioning, Emollient, Emulsifying, Surfactant)
1
B
Disodium Stearoyl Glutamate
(Hair Conditioning, Skin Conditioning, Surfactant Cleansingagent)
1
A
Aluminum Hydroxide
(Emollient, Humectant, Opacifying, Skin Protecting, Viscosity Controlling)
PARFUM
(Fragrance, Perfuming)
3
A
Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking)
3
CI 42051
(Cosmetic Colorant)

My Ingredient Notes

No personal ingredient notes yet. Save ingredients to your profile to get good/bad alerts here.

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Key ingredients

Vitamin E
Protects skin and soothes irritation.
Hyaluronic Acid
Hydrates by attracting and holding water.
Antioxidants
Shields skin from free radical damage.
Exfoliators
Removes dead skin cells to smoothe texture.

Benefits

Barrier RepairStrengthen and restore your skin's natural barrier.
HydratingBoosts hydration and relieves dry, tight skin.
Anti-AgingSoftens lines and helps skin look youthful.
Redness ReducingSoothes visible redness and calms irritation.
Acne FightingFights acne and helps prevent breakouts.
BrighteningRestores radiance to dull, tired skin.
Good For Oily SkinBalances oil and helps reduce shine.
Reduces Large PoresMinimizes the look of enlarged pores.

Concerns

Not fungal acne (malassezia) safe
May not suit dry skin
May not suit sensitive skin

Ingredients explained

Water
Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 Solvent
Kaolin
Abrasive, Absorbent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A AbrasiveAbsorbentAnticaking agentBulking agentOpacifyingSkin protectingSlip modifier
Caprylic/Capric Triglyceride
Emollient, Masking
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientMaskingPerfumingSkin conditioningSolvent
Propanediol
Solvent, Viscosity decreasing agent
Low-hazard ingredient.Read moreShow less
EWG 1 SolventViscosity decreasing agentViscosity controlling
Polyglyceryl-4 Laurate/Succinate
Emulsifying, Surfactant
Low-hazard ingredient.Read moreShow less
EWG 1 EmulsifyingSurfactant
Pentylene Glycol
Skin conditioning, Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningSolvent
Hectorite
Absorbent, Bulking agent
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A AbsorbentBulking agentOpacifyingSuspending agent - nonsurfactantViscosityincreasing agent - aqueousViscosity controlling
Hydrogenated Ethylhexyl Olivate
Emollient, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B EmollientSkin conditioning
Caprylyl/Capryl Glucoside
Cleansing, Foaming
Low-hazard ingredient.Read moreShow less
EWG 1 CleansingFoamingSurfactant
Levulinic Acid
Fragrance, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 FragranceSkin conditioningPerfuming
Vaccinium Myrtillus Fruit Extract
Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 Skin conditioning
Salvia Sclarea Extract
Anti sebum, Astringent
Limited public safety data.Read moreShow less
EWG N/A Anti sebumAstringentSkin conditioningSoothing
Sodium Sorbate
Preservative
Low-hazard ingredient.Read moreShow less
EWG 1 Preservative
Jojoba Esters
Emollient, Moisturising
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientMoisturisingSkin conditioningSoothing
Polyepsilon-Lysine
Hair conditioning, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A Hair conditioningSkin conditioning
+ 10 more — see the full ingredients list above
Glycerin
Denaturant, Fragrance
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A DenaturantFragranceHair conditioningHumectantOral care agentOral health care drugSkin protectingViscosity decreasing agentPerfumingSolvent Good for Dry SkinFungal-acne trigger
Sorbitan Oleate
Fragrance, Emulsifying
Potentially comedogenic - can block poresRead moreShow less
EWG 1 CIR A FragranceEmulsifyingSurfactant Bad for Oily SkinFungal-acne trigger
Sodium Hyaluronate
Skin conditioning, Humectant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningHumectant Good for Dry Skin
Citric Acid
Chelating agent, Fragrance
Skin irritation can occur at high concentrationRead moreShow less
EWG 2 CIR A Chelating agentFragrancePh adjusterBuffering agentMasking Bad for Sensitive Skin

How to use

How to use

  • 1 Where it fits: Use as the first step, on clean hands, before the rest of your routine.
  • 2 Morning & evening: Suitable for both AM and PM use.

General guidance from this product's category and active ingredients — always follow the directions on the package.

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