#5 The Mask
#5 The Mask
#5 The Mask
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Step 5: Clarity
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This collection delivers a proprietary a suite of Hydroxy Acids and Peptides to recalibrate the skin’s pH—for a refined, clear complexion.

#5 The Mask

20ml

£78.00
This perfecting mask recalibrates skin pH balance with a Complex of Hydroxy Acids, evening out skin tone and texture while revealing a picture of unbridled radiance.
Benefits
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Evens tone
Restores clarity
Enhances radiance
Targets
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Blemishes and congestion
Fine lines and wrinkles
Hyperpigmentation
Ingredients
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Aqua (Water), Glycerin, Octyldodecanol, Ethoxydiglycol, Pentylene Glycol, Polyacrylate Crosspolymer-6, Niacinamide, Propanediol, Lactic Acid, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Vaccinium Myrtillus Fruit Extract, Mica, Saccharide Isomerate, Salicylic Acid, Lauryl Lactate, 1,2-Hexanediol, Saccharum Officinarum (Sugar Cane) Extract, Melaleuca Alternifolia (Tea Tree) Leaf, Mentha Australis Leaf Extract, Butylene Glycol, Citrus Aurantium Dulcis (Orange) Fruit Extract, Citrus Limon (Lemon) Fruit Extract, Disodium EDTA, Piroctone Olamine, Santalum Spicatum (Sandalwood) Seed Oil, Sodium Hyaluronate, Caprylhydroxamic Acid, Tin Oxide, Polysorbate 60, Sorbitan Isostearate, Acer Saccharum (Sugar Maple) Extract, T-Butyl Alcohol, Citrus Aurantium Dulcis (Orange) Oil, Magnesium Aspartate, Zinc Gluconate, Citrus Aurantium Bergamia (Bergamot) Fruit Oil, Citrus Grandis (Grapefruit) Peel Oil, Citrus Limon (Lemon) Peel Oil, Litsea Cubeba Fruit Oil, Citrus Aurantium Bergamia (Bergamot) Leaf Oil, Juniperus Mexicana Oil, Pelargonium Graveolens Oil, Citrus Aurantium Amara (Bitter Orange) Flower Oil, Eugenia Caryophyllus (Clove) Leaf Oil, Lauryl Alcohol, Citrus Australasica Fruit Extract, Citric Acid, Sodium Citrate, Sodium Benzoate, Copper Gluconate, Potassium Sorbate, Glycine, Serine, Glutamic Acid, Aspartic Acid, Leucine, Alanine, Lysine, Arginine, Tyrosine, Phenylalanine, Proline, Threonine, Valine, Isoleucine, Histidine, Limonene, Citral, CI 77891 (Titanium Dioxide)
Complimentary

Complimentary Shipping on all orders.

Aqua (Water), Glycerin, Octyldodecanol, Ethoxydiglycol, Pentylene Glycol, Polyacrylate Crosspolymer-6, Niacinamide, Propanediol, Lactic Acid, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Vaccinium Myrtillus Fruit Extract, Mica, Saccharide Isomerate, Salicylic Acid, Lauryl Lactate, 1,2-Hexanediol, Saccharum Officinarum (Sugar Cane) Extract, Melaleuca Alternifolia (Tea Tree) Leaf, Mentha Australis Leaf Extract, Butylene Glycol, Citrus Aurantium Dulcis (Orange) Fruit Extract, Citrus Limon (Lemon) Fruit Extract, Disodium EDTA, Piroctone Olamine, Santalum Spicatum (Sandalwood) Seed Oil, Sodium Hyaluronate, Caprylhydroxamic Acid, Tin Oxide, Polysorbate 60, Sorbitan Isostearate, Acer Saccharum (Sugar Maple) Extract, T-Butyl Alcohol, Citrus Aurantium Dulcis (Orange) Oil, Magnesium Aspartate, Zinc Gluconate, Citrus Aurantium Bergamia (Bergamot) Fruit Oil, Citrus Grandis (Grapefruit) Peel Oil, Citrus Limon (Lemon) Peel Oil, Litsea Cubeba Fruit Oil, Citrus Aurantium Bergamia (Bergamot) Leaf Oil, Juniperus Mexicana Oil, Pelargonium Graveolens Oil, Citrus Aurantium Amara (Bitter Orange) Flower Oil, Eugenia Caryophyllus (Clove) Leaf Oil, Lauryl Alcohol, Citrus Australasica Fruit Extract, Citric Acid, Sodium Citrate, Sodium Benzoate, Copper Gluconate, Potassium Sorbate, Glycine, Serine, Glutamic Acid, Aspartic Acid, Leucine, Alanine, Lysine, Arginine, Tyrosine, Phenylalanine, Proline, Threonine, Valine, Isoleucine, Histidine, Limonene, Citral, CI 77891 (Titanium Dioxide)

The Results

95%

experienced heightened skin comfort.

91%

observed a more even tone.

86%

noticed an increase in radiance and brightness.

*Based on a 28-day trial with 21 participants.

The Essential Six System

AM
PM
1
Step 1: Resilience
This Collection delivers a proprietary Complex of B-Group Vitamins which support immunity and barrier function.
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2
Step 2: Vitality
This Collection delivers a proprietary Complex of Antioxidants which defends against oxidative stress.
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3
Step 3: Brilliance
This Collection delivers a proprietary Complex of Zinc Fusion Technology, Iron Oxides, and Melanin to offer superlative protection.
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4
Step 4: Integrity
This Collection delivers a proprietary Complex of Ceramides and Lipids, which restore and nurture the skin’s barrier function.
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Step 5: Clarity
This Collection delivers a proprietary suite of AHAs and Peptides to recalibrate the skin’s pH—for a refined, clear complexion.
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Step 6: Renewal
This Collection delivers Vitamin A and Botanical Retinol Alternatives, plus Actives rich in DNA Repair Enzymes, to support cellular turnover.
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The Ritual

Apply a generous layer to clean, dry skin.

Infuse for 20 minutes.

Rinse thoroughly with tepid water.

Inside the Formulation

Every RATIONALE Formulation is crafted with the highest quality of ingredients, formulated into three key Complexes.

The Primary Complex
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A proprietary Complex of Hydroxy Acids refines skin's clarity.

What is a Primary Complex?

The key ingredients that predominantly influence a Formulation.

The Secondary Complex
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Uniquely identified microbiome-supporting compounds alleviate congestion.

What is the Secondary Complex

Consists of supplementary ingredients that complement the Primary Complex.

Delivery System
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Water + Oil

What is the Delivery System?

Carries active ingredients into the skin

The Research

Clear, radiant skin is intrinsically connected to the health of the skin’s microbiome. This complex ecosystem is influenced by various factors—including its acidic pH, vital enzyme function, moisture reserves, and signalling proteins—which is why maintaining a healthy acidic balance is essential.

To optimise the skin’s immune defence systems, desirable bacterial colonies must be evenly distributed and active. Changes to the epidermal ecosystem caused by changes to skin pH or compromised barrier function, may result in an accumulation of pathogenic Colony Forming Units (CFUs) inside pores. This may lead to clogged pores, breakouts, increased sebaceous output and a rough, dry, sensitive texture. 

RATIONALE Research has identified and combined two potent yet calming actives – Salicylic Acid and Piroctone Olamine that help to restore optimal CFUs, controlling congestion and breakouts. 

In addition, an imbalanced pH impairs the function of enzymes, lipid synthesis and cellular turnover, while depleting our skin of essential structural proteins. These effects are further accelerated following exposure to pollution and solar damage. All of these vital cellular processes are restored when skin pH is recalibrataed back to youthful, acidic levels, restoring a radiant, purified complexion.

Frequently Asked Questions

What is the benefit of masking?
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Masking provides a potent, targeted infusion of active ingredients, enhancing your home care and treatment ritual when used weekly in addition to your Essential Six.

How does #5 The Mask differ from #1 The Mask and #2 The Mask?
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 #5 The Mask recalibrates skin pH with Hydroxy Acids, while #1 The Mask is formulated with B-Group Vitamins to support skin barrier defence and #2 The Mask defends skin from oxidative stress with antioxidants.

Can I use #5 The Mask consecutively with #1 The Mask or the #2 The Mask?
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#5 The Mask can be used simultaneously with #1 The Mask and #2 The Mask when they are zoned. Otherwise, we recommend using one per week for a full-face application.

How many times a week can these masks be applied?
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We recommend a weekly masking application. If you're targeting all three zones, you can utilise each one once a week on the corresponding area. To understand how you can incorporate masking into your RATIONALE Ritual, consult with your RATIONALE Skin Therapist or Medical Agency.

Can #1 The Mask, #2 The Mask and #5 The Mask be used during pregnancy?
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Yes, RATIONALE can continue to be used during pregnancy.

Some RATIONALE Formulations contain a propriety Complex of Vitamin A derivatives. Oral and topical prescription strength vitamin A medication should be avoided during pregnancy. Whilst there is not data to suggest that applying over-the-counter retinol (non-prescription) can be harmful in pregnancy, we recommended speaking to your doctor before beginning or continuing the use of any vitamin a Formulations during this time.

If you have any concerns or further questions about using active ingredients in skincare during pregnancy, we recommend consulting your Medical Practitioner.