Ingredient review
Bis-Adamantanyl PEG-800 Dicarboxamide
INCI: BIS-ADAMANTANYL PEG-800 DICARBOXAMIDE
A high-tech synthetic polymer that delivers extended hydration and a protective film, but is best suited for those who enjoy advanced, silicone-like textures.
In plain English
This ingredient is a large molecule made by combining a unique diamond-like structure (adamantane) with a long chain of polyethylene glycol (PEG-800). In simple terms, it acts like a smart sponge that holds water on your skin and forms a breathable, invisible shield. It helps keep moisture locked in for hours without feeling heavy or greasy, making it a favorite in modern moisturizers and anti-aging products.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Bis-Adamantanyl PEG-800 Dicarboxamide is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Bis-Adamantanyl PEG-800 Dicarboxamide.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic polymer composed of adamantane (a rigid, diamond-like molecule) attached to a long PEG chain (800 units). It is engineered to create a durable, water-binding film on the skin.
How it works
When applied, the PEG chain attracts and holds water molecules, while the adamantane groups anchor the polymer to the skin's surface. This combination forms a flexible, long-lasting film that reduces water loss (transepidermal water loss, or TEWL) and helps other ingredients stay effective longer.
Pros
Long-lasting hydration
The PEG-800 chain holds a large amount of water, providing moisture that lasts for hours, which is especially helpful for dry skin types.
Smooth, elegant feel
It creates a silky, non-sticky film that makes skin feel soft and smooth, similar to high-end silicone primers.
Cons and cautions
Synthetic origin
It is a lab-made polymer, which may not be preferred by those who want only natural or plant-derived ingredients in their routine.
Potential purity concerns
PEG compounds can sometimes contain trace impurities like ethylene oxide or 1,4-dioxane if not properly purified, though this is rare in well-regulated products.
Best for
- People with dry or dehydrated skin looking for long-lasting moisture
- Anyone who enjoys lightweight, silicone-like textures in their skincare
Use caution if
- Individuals who strictly avoid synthetic or PEG-based ingredients
Usage tips
Safety summary
Bis-Adamantanyl PEG-800 Dicarboxamide is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential. As with all PEG derivatives, quality control in manufacturing is important to avoid impurities. Overall, it is a well-tolerated ingredient for most skin types.
Research notes
Research on this specific ingredient is limited, but studies on similar PEG-based polymers and adamantane derivatives show they are effective humectants and film-formers with good safety profiles. The evidence is moderate, supported by cosmetic chemistry principles and formulation data.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Moisturizers, Anti-aging creams, Serums, Sunscreens
- Environmental note
- As a synthetic polymer, its biodegradability is limited. However, its use in low concentrations and its ability to reduce the need for frequent reapplication may offset some environmental impact.
Good to know
- The 'adamantane' part of the name comes from a molecule that resembles a diamond lattice, giving the ingredient its unique stability.
- This ingredient is often found in 'long-wear' or 'time-release' moisturizers because of its film-forming ability.
Common questions
What is Bis-Adamantanyl PEG-800 Dicarboxamide in beauty products?
This ingredient is a large molecule made by combining a unique diamond-like structure (adamantane) with a long chain of polyethylene glycol (PEG-800). In simple terms, it acts like a smart sponge that holds water on your skin and forms a breathable, invisible shield. It helps keep moisture locked in for hours without feeling heavy or greasy, making it a favorite in modern moisturizers and anti-aging products.
What does Bis-Adamantanyl PEG-800 Dicarboxamide do in a beauty product?
When applied, the PEG chain attracts and holds water molecules, while the adamantane groups anchor the polymer to the skin's surface. This combination forms a flexible, long-lasting film that reduces water loss (transepidermal water loss, or TEWL) and helps other ingredients stay effective longer.
Is Bis-Adamantanyl PEG-800 Dicarboxamide safe for most people?
Bis-Adamantanyl PEG-800 Dicarboxamide is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential. As with all PEG derivatives, quality control in manufacturing is important to avoid impurities. Overall, it is a well-tolerated ingredient for most skin types.
Who should be careful with Bis-Adamantanyl PEG-800 Dicarboxamide?
Individuals who strictly avoid synthetic or PEG-based ingredients
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.