Prep + Prime 24-Hour Extend Eye Base

MAC Cosmetics

Prep + Prime 24-Hour Extend Eye Base

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About this product

The MAC Cosmetics Prep + Prime 24-Hour Extend Eye Base is a misc. Our analysis of its 30 ingredients (26 low-risk) rates it Excellent (100/100). Based on its ingredients, it looks well-suited to dry and sensitive skin.

Vegan-friendly Reef-safe

Summarised from our ingredient analysis — not brand marketing copy.

At a glance

Type
Misc
Ingredients
30
Low-risk
26
Fragrance
Fragrance-free
Origin
United States

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 9/8
Good for dry skin
Isododecane Isopropyl Titanium Triisostearate Caprylyl Glycol Triethylhexanoin Trioctyldodecyl Citrate Trihydroxystearin Hydrogenated Polyisobutene Dimethicone Lecithin
Caution for dry skin
Sorbitan Sesquioleate Stearic Acid Kaolin Alumina Talc PEG-40 Stearate Silica Lecithin
Oily/Acne-Prone Skin No data
Sensitive Skin 5/3
Good for sensitive skin
Kaolin Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate Dimethicone Talc Tocopheryl Acetate
Caution for sensitive skin
Stearic Acid Isododecane Triethylhexanoin

Ingredients list

30 total
Lower hazard (1) Higher hazard (3)
All30 Skin Conditioning15 Emollient9 Viscosity Controlling8 Emulsifying5 Skin Protecting5 Abrasive5 Bulking Agent5 Opacifying5
EWG CIR Ingredient Name & Cosmetic Functions Notes
3
A
Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning)
Silicone
Silicone
1
B
Isododecane
(Fragrance, Solvent, Emollient, Perfuming)
3
A
Talc
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Skin Protecting, Slip Modifier)
Dimethicone Silylate
(Antifoaming Agent)
1
A
Trihydroxystearin
(Viscosity Increasing Agent, Emollient, Skin Conditioning, Solvent, Viscosity Controlling)
1
A
Disteardimonium Hectorite
(Stabilising, Viscosity Controlling)
1
A
Kaolin
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Skin Protecting, Slip Modifier)
1
A
Hydrogenated Polyisobutene
(Skin Conditioning, Emollient, Viscosity Increasing Agent, Viscosity Controlling)
1
A
Polyethylene
(Abrasive, Adhesive, Binding Agent, Bulking Agent, Emulsion Stabilising, Film Forming, Oral Care Agentagent, Viscosity Increasing Agent, Viscosity Controlling)
1
VP/Eicosene Copolymer
(Binding, Film Forming, Viscosity Controlling)
1
A
Trioctyldodecyl Citrate
(Emollient, Skin Conditioning)
3
Tocopheryl Acetate
(Antioxidant, Skin Conditioning)
Bad for Oily Skin
Bad for Oily Skin
2
3
Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Antistatic Agent, Emollient)
Bisabolol
(Fragrance, Skin Conditioning, Soothing)
1
A
Triethylhexanoin
(Fragrance, Hair Conditioning, Antistatic Agent, Emollient, Masking, Refatting, Skin Conditioning, Solvent)
1
2
A
Silica
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Viscosity Controlling)
2
A
Alumina
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Viscosity Controlling)
1
A
Propylene Carbonate
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling)
2
B
Ethylene/Methacrylate Copolymer
(Film Forming)
1
A
Sorbitan Sesquioleate
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
1
A
Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant)
1
A
Stearic Acid
(Fragrance, Sufactant, Emulsifying, Surfactantsurfactant Cleansing Agent Is Included As A Function For The Soap Form Of Stearic Acid., Emulsion Stabilising, Masking, Refatting)
Bad for Oily Skin
Bad for Oily Skin
Fungal Acne
Fungal Acne Trigger
1
A
Glycyrrhetinic Acid
(Skin Conditioning)
3
A
PEG-40 Stearate
(Emulsifying, Surfactant)
Fungal Acne
Fungal Acne Trigger
1
Isopropyl Titanium Triisostearate
(Surface Modifier, Emollient, Emulsifying)
1
A
Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate
(Antioxidant)
2
Mica
(Cosmetic Colorant, Opacifying)
CI 77891
(Colorant)
2
Iron Oxides
(Colorant, Cosmetic Colorant)
CI 77163
(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

Dimethicone
Skin Protecting, Emollient
Isododecane
Emollient
Talc
Skin Protecting
Trihydroxystearin
Emollient, Skin Conditioning
Kaolin
Skin Protecting
Hydrogenated Polyisobutene
Skin Conditioning, Emollient

Benefits

Good for dry skin
Good for sensitive skin

Concerns

Contains silicone
Not fungal acne (malassezia) safe

Ingredients explained

Isododecane
Fragrance, Solvent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR B FragranceSolventEmollientPerfuming
Talc
Abrasive, Absorbent
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A AbrasiveAbsorbentAnticaking agentBulking agentOpacifyingSkin protectingSlip modifier
Dimethicone Silylate
Antifoaming agent
Limited public safety data.Read moreShow less
EWG N/A Antifoaming agent
Trihydroxystearin
Viscosity increasing agent, Emollient
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Viscosity increasing agentEmollientSkin conditioningSolventViscosity controlling
Disteardimonium Hectorite
Stabilising, Viscosity controlling
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A StabilisingViscosity controlling
Kaolin
Abrasive, Absorbent
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A AbrasiveAbsorbentAnticaking agentBulking agentOpacifyingSkin protectingSlip modifier
Hydrogenated Polyisobutene
Skin conditioning, Emollient
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A Skin conditioningEmollientViscosity increasing agentViscosity controlling
Polyethylene
Abrasive, Adhesive
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A AbrasiveAdhesiveBinding agentBulking agentEmulsion stabilisingFilm formingOral care agentagentViscosity increasing agentViscosity controlling
VP/Eicosene Copolymer
Binding, Film forming
Low-hazard ingredient.Read moreShow less
EWG 1 BindingFilm formingViscosity controlling
Trioctyldodecyl Citrate
Emollient, Skin conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmollientSkin conditioning
Lecithin
Skin conditioning, Emulsifying
Low-to-moderate hazard.Read moreShow less
EWG 2–3 Skin conditioningEmulsifyingSurfactantAntistatic agentEmollient
Bisabolol
Fragrance, Skin conditioning
Limited public safety data.Read moreShow less
EWG N/A FragranceSkin conditioningSoothing
Triethylhexanoin
Fragrance, Hair conditioning
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A FragranceHair conditioningAntistatic agentEmollientMaskingRefattingSkin conditioningSolvent
Silica
Abrasive, Absorbent
Low-hazard ingredient.Read moreShow less
EWG 1–2 CIR A AbrasiveAbsorbentAnticaking agentBulking agentOpacifyingViscosity controlling
Alumina
Abrasive, Absorbent
Low-hazard ingredient.Read moreShow less
EWG 2 CIR A AbrasiveAbsorbentAnticaking agentBulking agentOpacifyingViscosity controlling
+ 10 more — see the full ingredients list above
Dimethicone
Antifoaming agent, Skin protecting
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A Antifoaming agentSkin protectingEmollientSkin conditioning Silicone
Tocopheryl Acetate
Antioxidant, Skin conditioning
Potentially comedogenic - can block poresRead moreShow less
EWG 3 AntioxidantSkin conditioning Bad for Oily Skin
Sorbitan Sesquioleate
Emulsifying, Surfactant
Low-hazard ingredient.Read moreShow less
EWG 1 CIR A EmulsifyingSurfactant Fungal-acne trigger
Stearic Acid
Fragrance, Sufactant
Potentially comedogenic - can block poresRead moreShow less
EWG 1 CIR A FragranceSufactantEmulsifyingSurfactantsurfactant-cleansing agent is included as a function for the soap form of stearic acid.Emulsion stabilisingMaskingRefatting Bad for Oily SkinFungal-acne trigger
PEG-40 Stearate
Emulsifying, Surfactant
Low-to-moderate hazard.Read moreShow less
EWG 3 CIR A EmulsifyingSurfactant Fungal-acne trigger

How to use

How to use

  • 1 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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