Gel, Acrylic and Polygel Nails: How Each System Works

Gel, acrylic and polygel in Gandia are the three nail-building systems most used in beauty salons, but chemically they work in completely different ways. This guide explains how each one behaves from application to removal, and what their real advantages are — not the marketing ones — looking at composition, process, strength and upkeep from a technical angle. Also available: polygel in Ontinyent.

Composition and technology of each nail system

Gel nails: light curing under a UV/LED lamp

Nail gel is a viscous acrylic polymer that hardens through photopolymerisation: a chemical reaction triggered by UV or LED light, which activates the photoinitiators in the formula and starts the material curing. Unlike acrylics, the reaction isn't exothermic under normal conditions, which makes the application noticeably more comfortable for the client.

Gels come in different viscosities depending on the job: the runnier ones are used as a thin overlay on the natural nail; thicker ones let the technician sculpt extensions and build the stress area without the product running. Curing happens layer by layer, which gives the technician full control and allows corrections before the lamp goes on at each stage.

For more on the types of gel and how they differ in practice, read everything about gel nails in 2026.

Acrylic nails: a powder-and-liquid chemical reaction

Acrylics are made by combining two components: a polymer powder (polymethyl methacrylate) and an activating liquid or monomer (ethyl methacrylate, depending on the formula). Mixing them sets off an exothermic polymerisation reaction that gives off heat as the material sets — which is why some clients feel a slight warmth under the nail during application.

It sets without a lamp, simply through contact with air and the reaction between the two components. That limits the working time: the bead of acrylic picked up on the brush stays workable for 20 to 40 seconds before it starts to harden, which calls for more speed and precision than gel or polygel. The end result is the most rigid of the three materials.

For designs and options, see our complete guide to acrylic nails. You'll find them under acrylic nails in Gandia and acrylic nails in Ontinyent.

Polygel: the hybrid that combines the best of both

Polygel combines acrylic powder and UV gel in a semi-solid paste — a bit like soft modelling clay — that doesn't react to air or light until it's deliberately cured under the LED lamp. That gives a practically unlimited working time: the technician can shape, correct and refine the form as many times as needed before curing.

Its formula includes gel photoinitiators and acrylic-system monomers in concentrations that reduce spontaneous reactivity and, with it, the smell during the appointment. The result: a material that's more flexible than pure acrylic, stronger than most builder gels and very light on the natural nail.

For a comparison focused only on these two systems, read the differences between gel and polygel.

Step-by-step application of each technique

How gel nails are applied

1. Prep: cleansing, pushing back the cuticles and a light buff of the surface to remove the shine without harming the nail plate.
2. Primer and bonding base: these improve the gel's adhesion to the keratin of the nail.
3. Building in layers: the gel is brushed on from the cuticle area towards the free edge. For extensions, a form (mould) or tip is used as support.
4. Curing under the lamp: 30-60 seconds per layer under an LED lamp; 2-3 minutes under UV. It can't be rushed without risking incomplete curing underneath.
5. Filing and finish: shaping, top coat and final cure.

A full appointment with extensions takes 70 to 90 minutes, depending on length.

How acrylic nails are built

1. Prep: cleansing, dehydrator and primer to remove any oil and get maximum adhesion.
2. Forming the acrylic bead: the brush is dipped in monomer and picks up powder, forming a moist, workable bead.
3. Applying zone by zone: the nail is worked in three zones — base (zone 1), stress area (zone 2) and free edge (zone 3) — placing and working each bead before it starts to set.
4. Air setting: the material hardens in 2-5 minutes without a lamp.
5. Progressive filing and buffing: medium grit for shape, a buffer to smooth, and a matte or glossy finish.

How polygel is worked

1. Prep: the same as for the other systems.
2. Dispensing and placing: the paste is taken from the tube with a spatula or brush and placed straight onto the nail or into a form.
3. Shaping with slip solution: a brush dampened with slip solution spreads and shapes the paste without it sticking to the brush; this can be repeated with no time pressure.
4. Curing section by section: 60-90 seconds under an LED lamp per area.
5. Filing and finish: as with gel, with fewer post-cure corrections thanks to the long working time.

With no free monomer, the typical acrylic smell is practically gone — something many clients really appreciate during longer appointments.

Comparison table: wear, strength and flexibility

Upkeep and how often each system needs an infill

All three systems need regular infills because the natural nail keeps growing underneath, exposing the cuticle area and creating a growing structural stress point.

Gel: an infill is recommended every 3 weeks. After that, the regrowth area is left uncovered, which looks uneven and weakens adhesion at the base.

Acrylic: you can go 3 to 4 weeks between infills. Because they're more rigid, the regrowth acts as a lever on the nail plate: the longer you go without an infill, the higher the risk of the whole extension breaking or lifting.

Polygel: intervals similar to gel, 2 to 3 weeks for the best result, although slow-growing nails can go up to 4 weeks without obvious problems.

Signs you need an appointment soon, whatever the system:

• Visible lifting at the edges or around the cuticle
• Discolouration under the product (yellow, white, greenish patches)
• A visible crack or break in the extension
• The nail bending abnormally when pressed
• More than 5 weeks since your last appointment

If it's a one-off break, see what to do in our guide to professional repair of a broken nail before trying any home fixes.

Common problems and how to fix them

Lifting and early detachment

Early lifting almost always comes down to surface prep: traces of oil, cuticle or moisture stop the product bonding properly with the keratin. Applying product too close to the cuticle fold also plays a part — there should be a 0.5-1 mm gap — as does long exposure to water in the first 24 hours after the appointment.

At the salon, the fix is to remove the lifted area, prep the surface again and fill it with the same product. At home: wear gloves for long jobs involving water and avoid soaking your hands for the first 24 hours after your appointment.

Breaks, cracks and brittleness

Acrylics, being more rigid, tend to crack at the stress area — where the natural nail meets the extension — when hit hard from the side. Gel and polygel, being more flexible, absorb that energy better and tend to bend before they snap. That said, a break in gel can be harder to repair cleanly if it covers a large area.

If anything cracks, don't try to pull the product off: you could take layers of natural nail with it. The right thing to do is book a professional repair, where the technician files down the break, fills it with the same system and seals the area again.

Damage to the natural nail and how to prevent it

The natural nail isn't damaged by the system itself but by incorrect removal. Ripping or prising off gel, polygel or acrylic strips away the top layers of the nail plate, leaving it thin, with white patches and sensitive to touch. Proper removal — an acetone soak with foil wraps for gel and polygel, progressive filing for acrylics — can take 15 to 30 minutes but leaves no lasting damage if done patiently.

One more risk to bear in mind: the methacrylates in acrylic and polygel can cause allergic reactions in sensitive people. Symptoms include itching, redness or swelling around the nail. If they appear, tell your technician and see a dermatologist before carrying on. Pure UV gel has a lower concentration of free methacrylates and is usually better tolerated by reactive skin. For more on caring for your nails between appointments, see our guide to natural nail care.

If you need any of these systems removed safely, our guide to safe gel and acrylic removal walks you through the process step by step.

Quick guide: which system suits you

The technical differences above translate directly into practical choices. As a quick reference:

• Busy hands or very hands-on work: polygel at short-medium length (flexibility and strength without extreme rigidity)
• First time with extensions: gel overlay or polygel (a more controllable process, with no monomer smell)
• Fragile, thin or bitten nails: gel overlay or a thin layer of polygel (controlled curing, minimal stress on the nail plate)
• Very long extensions or heavy front-on loads: acrylic (greater structural rigidity)
• Elaborate designs and nail art: builder gel or polygel (more decorative versatility in thin layers)

For a fuller analysis by client profile — including how they compare with semigel and price differences — see gel vs polygel vs acrylic: which to choose and our acrylic vs gel vs semigel comparison.

Gel, acrylic and polygel nails in Gandia and Ontinyent

At Adrian Beauty Studio, all three systems are available at both salons, applied by technicians who specialise in each one. If you're interested in polygel in particular, you can see the options on our polygel service page. Prices go by length: gel or polygel from €30 (short), €37 (medium) and €43 (long); acrylics from €36, €43 and €49. A first set or adding length costs €5 extra.

If you're on the La Safor coast, our Gandia salon offers gel nails, acrylics and polygel in Gandia, with a check of your natural nails beforehand. If you're in the Vall d'Albaida area, our Ontinyent salon has the same services: gel nails, acrylics and polygel in Ontinyent with personal attention. You can see all our manicures in Gandia and manicures in Ontinyent.

If you're still not sure which system to go for, you don't need to arrive with your mind made up: at the salon we quickly check the condition of your natural nails before we start and recommend the best option for you.

Frequently asked questions about gel, acrylic and polygel

Which lasts longer, gel or acrylic nails?

With similar activity and care, acrylics last a little longer before needing an infill: 3 to 5 weeks compared with the typical 3-4 weeks for gel and polygel. That said, how long they really last depends on how fast your nails grow, how active you are and the quality of the application. For very busy hands, the practical difference between systems is minimal; other factors such as flexibility, weight or ease of removal can matter more day to day.

Is polygel kinder to natural nails than gel?

Neither polygel nor gel damages the natural nail when applied and removed properly. Damage almost always comes from incorrect removal — forcing the product off — or overly aggressive surface prep. Polygel has the advantage of no loose powder in the air and fully controlled curing: the technician can correct the shape before switching on the lamp, which reduces the need for heavy filing to fix mistakes.

Can gel nails be repaired without going to the salon?

A surface crack can be sealed temporarily with top coat, but it's not a lasting fix. If the break reaches the natural nail, trying to repair it at home with non-professional products can trap moisture or bacteria between the layers, which encourages discolouration or infection. The safest option is a professional repair of a broken nail, so the technician can assess the damage and fill it with the right product.

What's the difference between gel and gel polish?

Builder gel is a high-viscosity material that creates volume and structure and can add length to the nail; gel polish (Shellac, rubber base) is a thin layer of colour applied straight onto the natural nail without building any structure. Gel polish lasts 2 to 4 weeks but doesn't strengthen the nail or change its shape. If all you want is long-lasting colour without extensions, gel polish is enough; if you want length, a different shape or reinforcement for fragile nails, you need gel, polygel or acrylic. You'll find gel polish in Gandia and gel polish in Ontinyent.

How often do gel nails need an infill?

The recommended interval is roughly every 3 weeks. By then, the regrowth near the cuticle is visible, the product may start to lose adhesion at the edges and the contrast between the new growth and the covered nail becomes obvious. Waiting longer than 4 weeks increases the risk of lifting, because the regrowth gradually levers the product up from the base of the nail.

Are acrylic nails stronger than polygel?

Against direct front-on loads, acrylics beat polygel thanks to their greater rigidity. However, polygel copes better with repeated bending and side impacts — common for anyone who types, plays an instrument or does varied manual work — because its more flexible formula absorbs the energy without snapping. For very long extensions under heavy loads, acrylics are the benchmark; for medium lengths and varied activity, polygel is usually more comfortable and longer-lasting in daily use.

Which type of nails is best for hard-working hands?

For physically demanding jobs — hospitality, physiotherapy, sport, intensive manual work — the best option is usually a polygel overlay or a short-medium extension: it combines good strength with enough flexibility not to snap on impact. Acrylics handle front-on loads very well, but their extreme rigidity can make them crack suddenly when knocked from the side. Keeping a moderate length with any system significantly reduces the risk of breaks and discomfort at work.

Can I switch from gel to acrylic without a full removal?

It's not recommended. Applying acrylic over cured gel doesn't guarantee a good bond between the systems — their surfaces are chemically different — and the risk of early lifting rises considerably. Switching system means removing the gel completely with an acetone soak or filing, depending on the type of gel, and starting from scratch. Our guide to safe gel and acrylic removal explains the whole process step by step, without damaging your natural nails.

Still not sure which system to choose? At Adrian Beauty Studio we'll help you decide at your appointment, checking the condition of your natural nails and your lifestyle before we start. You can book at our Gandia salon or our Ontinyent salon whenever suits you.

What gel, acrylic and polygel are

Gel nails harden under a UV/LED lamp, with a glossy, lightweight finish. Acrylics mix powder and liquid that set in the air: maximum strength. Polygel combines both: a putty-like texture that cures under the lamp, with the lightness of gel and the solidity of acrylic.

Technical comparison