Have you ever wondered what is actually inside the gel you're applying to your own nails or your clients' nails? What gives one gel incredible flexibility while another feels rock hard? Why do some gels soak off easily in acetone, while others need to be filed away? And why can two products look similar in the pot but perform completely differently on the nail? As a nail technician, I've always been fascinated by the science behind nail products. Understanding how different ingredients work together helps us make better product choices and achieve better results for our clients.
Let's take a closer look at what modern UV and LED gels are made of, how these ingredients are produced, and the important role each one plays in the final formula.
Where Do Gel Ingredients Come From?
One fact that surprises many people is that most ingredients used in professional nail gels originate from the petrochemical industry. This doesn't mean they are simply "oil in a pot." Through highly controlled chemical processes, raw materials derived from petroleum are transformed into sophisticated cosmetic-grade ingredients specifically designed for beauty and personal care products.
In fact, many everyday items around us—including contact lenses, medical devices, food packaging, cosmetics, vaseline for your lips and even some medicines—contain materials that originally came from petrochemical sources. The ingredients used in nail gels are carefully purified, tested, and formulated to meet cosmetic safety standards before they ever reach a bottle or jar.
Why Are Some Gels Flexible and Others Hard?
The answer lies in the formulation.
Soft gels contain resins and oligomers that create a more flexible polymer network when cured. This flexibility allows the product to move slightly with the natural nail, which is why soak-off gels can usually be removed with acetone. Hard gels, on the other hand, contain ingredients that create a much stronger and more tightly cross-linked structure during curing. Once cured, the polymer chains become so densely connected that acetone cannot effectively break them down. That's why hard gels typically need to be filed off rather than soaked off. Neither type is better—they are simply designed for different purposes. Soft gels prioritize flexibility and easy removal, while hard gels prioritize strength, durability, and structural support.
More Than Just "Gel"
A nail gel is actually a carefully balanced blend of several ingredient categories:
-Resins and oligomers that provide strength and flexibility
-Adhesion promoters that help the product bond to the natural nail
-Photoinitiators that react to UV or LED light and start the curing process
-Stabilizers that prevent the product from curing and changing its consistency inside the bottle
-Pigments and effect particles that create colour, shimmer, and special effects
-Texture modifiers that control viscosity and application
Every ingredient serves a specific purpose. Remove one component or change its concentration, and the entire performance of the gel can change. Understanding what goes into a formula helps explain why some products self-level beautifully, some stay exactly where you place them, some cure faster than others, and some offer exceptional durability while others focus on flexibility.
So next time you open a pot of gel, remember—you're not just looking at a coloured product. You're looking at a carefully engineered formula created through chemistry, material science, and years of product development.
Nail Jam gels Ingredients Breakdown:
Structural Resins & Strength Builders
Bis-HEA Poly(1,4-Butanediol)-9/IPDI Copolymer
The backbone of the gel formula. This advanced resin provides strength, durability, and flexibility, helping the product resist cracking, lifting, and breakage.
Contribution to the formula: Strength, durability, flexibility, and long-lasting wear.
Hydroxyethyl Acrylate/IPDI/PPG-15 Glyceryl Ether Copolymer
A specialized resin that improves adhesion and flexibility. It helps the gel bond securely to the natural nail while maintaining comfortable wear.
Contribution to the formula: Adhesion, flexibility, and retention.
Isobornyl Methacrylate
A hard-wearing ingredient that enhances scratch resistance and contributes to a glossy, durable finish.
Contribution to the formula: Hardness, scratch resistance, and shine.
PEG-22 Dimethacrylate
A cross-linking ingredient that forms a strong network during curing, increasing the strength and stability of the finished enhancement.
Contribution to the formula: Strength, durability, and structural integrity.
Acrylates Copolymer
Forms a smooth, flexible film on the nail surface that improves wear resistance and overall performance. Manufacturer "unique blend" or "custom signature mixture" of polymers that's different and what's make their gels different to others. Every manufacturer has their own formulation of this "signature ingredient"
Contribution to the formula: Flexibility, durability, and a smooth finish.
Adhesion Promoters
Bis(Methacryloyloxyethyl) Phosphate
A powerful adhesion promoter that helps the gel grip the natural nail more effectively, reducing the risk of lifting.
Contribution to the formula: Superior adhesion and longer wear.
Texture & Application Enhancers
Silica
A mineral powder that controls viscosity and prevents the gel from running. It helps the product stay where it is placed during application.
Contribution to the formula: Improved consistency, control, and ease of application.
Dimethicone
A silicone-based ingredient that creates a silky-smooth feel and helps the gel level evenly for a flawless finish.
Contribution to the formula: Smooth application, shine, and improved texture.
Ethyl Acetate
A fast-evaporating solvent that helps maintain the ideal consistency of the formula and supports smooth application.
Contribution to the formula: Product stability and easy application.
Photoinitiators – The Ingredients That Make the Gel Cure
Photoinitiators are essential in UV/LED gels. They absorb light energy from the lamp and trigger the chemical reaction that transforms liquid gel into a durable solid coating.
Methyl Benzoylformate
Helps initiate the curing process when exposed to UV or LED light.
Contribution to the formula: Reliable curing.
Hydroxycyclohexyl Phenyl Ketone
Works with other photoinitiators to ensure even curing throughout the product.
Contribution to the formula: Thorough and consistent curing.
Ethyl Trimethylbenzoyl Phenylphosphinate
A modern, highly efficient photoinitiator that provides rapid and deep curing under LED lamps.
Contribution to the formula: Fast curing and enhanced performance.
Stability & Shelf Life
p-Hydroxyanisole
A stabilizer that prevents the gel from curing inside the bottle, helping maintain product quality throughout its shelf life.
Contribution to the formula: Stability and product freshness.
Colour & Visual Effects
Polyethylene Terephthalate (PET)
Creates sparkle, shimmer, and reflective effects. Often used in glitter and special-effect shades.
Contribution to the formula: Light reflection and visual effects.
CI 15985 (Sunset Yellow FCF) and other pigments
A cosmetic-grade colour pigment used to create vibrant yellow, orange, coral, and warm-toned shades.
Contribution to the formula: Rich, vibrant colour.
When these ingredients work together, they create a professional-quality gel that offers:
-Strong adhesion
- Excellent durability
- Smooth application
- Fast and reliable curing
- High shine
- Long-lasting wear
- Beautiful colour and special effects
Every ingredient has a purpose, helping transform a liquid formula into a strong, beautiful, salon-quality gel.
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