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Product Comparison

Here's our complete breakdown comparing the ingredients, attributes, and more of Rare Beauty Always an Optimist Weightless Eye Primer versus Elizabeth Mott Thank Me Later Eye Primer .

Published on January 16, 2024

Overview

What they are

These products are both cruelty-free and reef safe eye primers. They have a total of 9 ingredients in common

Cool Features

They both contain exfoliants

Free From

They both do not contain any harsh alcohols, common allergens, fragrances, oils or parabens

What's Inside

They both contain silicones

We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.

Eye Primer American Brand United States
Eye Primer American Brand United States

Eye Primer

Eye primers help make eye makeup last longer.

Eye Primer

Eye primers help make eye makeup last longer.

Price

Shop

Buy Always an Optimist Weightless Eye Primer

Starts at $21.00
Shop

Buy Thank Me Later Eye Primer

Starts at $13.99

Ingredient Info

Click any item below to learn more and view relevant ingredients.
alcohol-free
silicon-free
fragrance-free
sulfate-free
paraben-free
oil-free
fungal-acne safe
reef-safe
eu-allergen-free
vegan
cruelty-free
alcohol-free
silicon-free
fragrance-free
sulfate-free
paraben-free
oil-free
fungal-acne safe
reef-safe
eu-allergen-free
vegan
cruelty-free

At a glance

Click on any of the items below to learn more

Notable Ingredients

Exfoliators

Benefits

Hydrating
Brightening

Concerns

Drying
Acne Trigger
Rosacea
Eczema

Notable Ingredients

Exfoliators

Concerns

May Worsen Oily Skin
Acne Trigger
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Ingredients Side-by-side

Ingredients that are highlighted in purple are present in both products.

Learn more about what what Com. / Irr. ratings are

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Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

1
What it does: Emollient, Solvent
Community Rating: Disliked

Isododecane is a fragrance, emollient, and solvent.

As an emollient, it helps your skin stay soft and hydrated. Emollients help trap moisture into your skin.

Isododecane's role as a solvent makes it a great texture enhancer. It spreads smoothly on skin and does not leave a sticky feeling behind. Isododecane also helps prevent color transfer in makeup products.

Isododecane is not absorbed into skin.

Learn more about Isododecane

Rare Beauty Always an Optimist Weightless Eye Primer contains this as ingredient number 2.

Elizabeth Mott Thank Me Later Eye Primer contains this as ingredient number 3.

2
What it does: Abrasive, Absorbent, Skin Protecting
Community Rating: Very Disliked

Talc is a clay mineral. It helps absorb moisture and improve the texture of products. Like other types of clay, Talc can have a slight exfoliating effect on skin. Talc can be added to increase the volume of products.

Some Baby powders are made by combining talc with corn starch. The word "talc" comes from Latin and originates from Arabic. Talc is a mineral commonly found throughout the world.

If you have any concerns about using talc, we recommend checking out the FDA's official page.

Learn more about Talc

Rare Beauty Always an Optimist Weightless Eye Primer contains this as ingredient number 3.

Elizabeth Mott Thank Me Later Eye Primer contains this as ingredient number 2.

3
What it does: Emollient, Skin Conditioning, Skin Protecting
Community Rating: Very Disliked

Dimethicone is a silicone used for making products smooth and silky. It also has the added benefit of sealing in hydration. The amount of dimethicone found in beauty products is considered safe and non-comedogenic, meaning it won't clog pores.

Dimethicone has been found increase absorption in skin, boosting the benefits of other ingredients. While there is concern for the safety of dimethicone, the levels used in skincare are safe for use.

Rare Beauty Always an Optimist Weightless Eye Primer contains this as ingredient number 4.

Elizabeth Mott Thank Me Later Eye Primer contains this as ingredient number 16.

4
What it does: Emollient, Skin Conditioning
Community Rating: Disliked

This silicone is an emollient. Emollients create a thin film on the skin to prevent moisture from escaping.

It is not soluble in water and helps increase water-resistance in products.

According to a manufacturer, it can blend seamlessly with silicone oils, such as Cyclopentasiloxane.

Learn more about Trimethylsiloxysilicate

Rare Beauty Always an Optimist Weightless Eye Primer contains this as ingredient number 7.

Elizabeth Mott Thank Me Later Eye Primer contains this as ingredient number 10.

5
What it does: Stabilising
Community Rating: Disliked

Disteardimonium Hectorite comes from the clay mineral named hectorite. It is used to add thickness to a product.

It can also help stabilize a product by helping to disperse other ingredients.

Hectorite is a rare, white clay mineral.

Learn more about Disteardimonium Hectorite

Rare Beauty Always an Optimist Weightless Eye Primer contains this as ingredient number 14.

Elizabeth Mott Thank Me Later Eye Primer contains this as ingredient number 5.

6
What it does: Solvent

This ingredient is a solvent. It helps dissolve active ingredients and alter the texture of products.

Propylene Carbonate is commonly used in makeup and with clay, such as montmorillonite or bentonite.

Studies show this ingredient to be safe for cosmetics. When it is undiluted, it can cause skin irritation. (It is always diluted in skincare and makeup). This ingredient is water-soluble.

Propylene Carbonate is created from propylene glycol and carbonic acid.

Learn more about Propylene Carbonate

Rare Beauty Always an Optimist Weightless Eye Primer contains this as ingredient number 19.

Elizabeth Mott Thank Me Later Eye Primer contains this as ingredient number 11.

7
What it does: Skin Conditioning
Community Rating: Mixed

Ethylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.

You might see Ethylhexylglycerin often paired with other preservatives such as phenoxyethanol. Ethylhexylglycerin has been found to increase the effectiveness of these other preservatives.

Rare Beauty Always an Optimist Weightless Eye Primer contains this as ingredient number 20.

Elizabeth Mott Thank Me Later Eye Primer contains this as ingredient number 17.

8
What it does: Cosmetic Colorant
Community Rating: Disliked

Ci 77891 is a white pigment from Titanium dioxide. It is naturally found in minerals such as rutile and ilmenite.

It's main function is to add a white color to cosmetics. It can also be mixed with other colors to create different shades.

Ci 77891 is commonly found in sunscreens due to its ability to block UV rays.

Learn more about CI 77891

Rare Beauty Always an Optimist Weightless Eye Primer contains this as ingredient number 21.

Elizabeth Mott Thank Me Later Eye Primer contains this as ingredient number 21.

9
What it does: Cosmetic Colorant
Community Rating: Mixed

Ci 77491 is also hydrated iron III oxide. It's sole purpose is to give a red/pink hue to products.

Iron III oxides are classified as inorganic chemicals for coloring.

Synthetically created Ci 77491 is considered safer than those naturally found. This is because the synthetically created version may contain less impurities. Iron oxides are generally non-toxic and non-allergenic.

Learn more about CI 77491

Rare Beauty Always an Optimist Weightless Eye Primer contains this as ingredient number 22.

Elizabeth Mott Thank Me Later Eye Primer contains this as ingredient number 22.

Here's what our community thinks of the ingredients in these two products.

18% are loved or liked
9% have mixed ratings
59% are disliked or very disliked
14% have no rating yet
5% are loved or liked
14% have mixed ratings
59% are disliked or very disliked
23% have no rating yet

Usage

Here's some more info on how this product is used by our community.

Alternatives

Our Dupe Finder has found 10 potential alternatives that have similar ingredients to Rare Beauty Always an Optimist Weightless Eye Primer.

See 10 alternatives

Our Dupe Finder has found 18 potential alternatives that have similar ingredients to Elizabeth Mott Thank Me Later Eye Primer.

See 18 alternatives
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