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For chemically treated, colored or heat damaged hair.
There’s one very important cause of hair loss that is always overlooked: hair breakage. Weak strands with damaged cuticles break easily and hair just can’t grow long or thick. Theorem Density Mask repairs the hair cuticle to promote hair retention. The advanced, silicon-infused formula plumps up hair strands like an injectable filler. Works synergistically with heat to strengthen and thicken hair strands, giving you the length and shine you deserve.
5.5 fl oz | 163 ml
Ingredients: Water (Aqua), Cetyl Alcohol, Dimethiconol Meadowfoamate, Glycerin, Isopropyl Myristate, Behentrimonium Chloride, Cocos Nucifera (Coconut) Oil, Melaleuca Alternifolia (Tea Tree) Leaf Water, Biotin, Bambusa Vulgaris Leaf/Stem Extract, Chondrus Crispus Extract, Equisetum Arvense Extract, Chenopodium Quinoa Seed Extract, Rosa Damascena Flower Water, Hydroxyethylcellulose, Fragrance, Silicone Quaternium-3, Trideceth-12, Tetrasodium Glutamate Diacetate, Phenoxyethanol, Caprylyl Glycol, Ethylhexylglycerin, Hexylene Glycol, Sodium Hydroxide, Benzyl Salicylate, Citral, Hexyl Cinnamal, Hydroxycitronellal, Limonene, Linalool, Alpha-Isomethyl Ionone
Directions: For Oily/Normal Hair: Apply to damp hair in place of conditioner. Allow 5-10 minutes and rinse. Style as usual. Damaged/Breaking Hair: Start with damp hair. Apply instead of a leave-in conditioner. Air dry or activate with heat by blow-drying or using a heated styling tool.
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Dermatologist Tested
Vegan
Gluten-Free
No Animal Testing
The unique silicon molecules (atomic number 14) within this hair mask are proven to penetrate the "plates" of the hair shaft. Similar to the way hyaluronic acid is injected into lips for a plumping effect, this material is "micro-injected" into your hair shaft for a plumping effect. This effect is actually improved by heat, so if you do choose to heat style your hair, these molecules will actually activate and expand, making each individual hair strand thicker, stronger, and smoother. Normally heat breaks down your hair but this mask allows you to harness the power of heat to strengthen your hair, helping it to grow stronger, thicker and longer.
Raquel S.
"Wow’d by the softness of my hair after using it once! "
Tiffany M.
"Smells amazing."
Jess V.
"Smells really good- love how her hair feels after one use."
Hannah L.
"I loved the way it feels on my hair. Super easy to brush through after the shower."
Alissa
"AMAZING PRODUCT! "
Valerie V.
"Loved it - using it since 03/2020"
Rebecca B.
Alex
"The smell was amazing! Hair was noticeably soothed."
Allison M.
"Loved the way the hair effortlessly blow dried out and have great shine."
Brooke D.
"My long hair is such a pain to brush and after one use I noticd it was smooth and much easier to comb through."
60-Days Guarantee
We have so much faith in our products that we offer a 60-day, no quibble, money-back guarantee. If you don’t love our products, just send it back to us for a full refund.
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Our simple 3-part strengthening system may be used in conjunctionwith your favorite shampoo and conditioner.
Anti-Aging Skincare Trio
AHA/BHA Facial-Cleanser
Hyaluronic Acid Serum
Lightweight Anti-Aging Gel-Cream
Nourishing Scalp Oil
For dry hair and scalp
Soft Curls Leave-In Conditioner
For wavy, curly, coily, textured and porous hair types
Conditioning Curl Cleanser
For naturally wavy or curly hair
Curl Cream
Enhance & define curls
Blowout Styling Balm
Eliminate frizz and protect from heat
Volumizing Root Serum.
For Fine, Thinning Hair.
Deep Conditioning Repair Mask.
Damage Recovery Oil.
For dry, frizzy hair and split ends.
Hydration Shampoo
For dry, damaged or frizzy hair.
Hydration Conditioner
Hydration Shampoo & Conditioner
Texturizing Shampoo
For fine, thin or flat hair.
Texturizing Conditioner
Texturizing Shampoo & Conditioner
Blonde Boosting Shampoo
Blonde Boosting Conditioner
Blonde Boosting Duo
The Theorem Method is a 3-part haircare system that offers a simple solution to healthier hair. Our simple 3-part system offers lightweight, nourishing solutions that support healthy hair growth while mending damaged, brittle hair. Resulting in thicker, longer, stronger, and healthier hair.
AHA/BHA Facial Cleanser
Skin and Hair Essentials
Touch-Up Smoothing Milk
For all hair types
For dry, damaged or frizzy hair
For fine, thin or flat hair
For blonde, highlighted or gray hair
"Smells really good- love how my hair feels after one use."
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