Gel nails use a light-cured gel product applied in layers and hardened under a UV or LED lamp. Acrylic nails use a liquid monomer and powder polymer that air-dry into a hard coating. Gel tends to be more flexible and natural-looking; acrylic is generally stronger and better suited to nail extensions. Both are popular services that can be learned as part of an online nail technology course.
If you're thinking about becoming a nail technician — or just trying to understand what to offer clients — knowing the practical difference between gel and acrylic nails matters. Here's an honest breakdown of both systems, who each suits, and what it means for your training.
What are gel nails?
Gel nails are made from a gel-based product (either soft gel or hard gel) that is applied to the nail in thin layers and cured under a UV or LED lamp. The lamp triggers a chemical reaction that hardens the gel, creating a durable, glossy finish.
There are several types of gel nail products:
- Gel polish (shellac or soak-off gel) — a flexible, chip-resistant polish that lasts 2–3 weeks. Soaks off with acetone.
- Hard gel — stronger and used for extensions or overlays. Requires filing to remove.
- Builder gel / BIAB (Builder in a Bottle) — a thicker gel that builds structure and strength. Applied directly to the natural nail or over a form for extensions. Highly popular in Australian salons right now.
Gel nails are known for a natural, glossy finish and flexibility that moves with the natural nail, reducing the risk of breakage at the point where nail meets product.
What are acrylic nails?
Acrylic nails are created by combining a liquid monomer with a powder polymer (the "bead" system). When the technician dips a brush into the liquid and picks up a small amount of the powder, a chemical reaction begins immediately. The resulting product is shaped onto the nail and hardens as it air-dries — no lamp required.
Acrylic is known for its strength and durability. It's particularly well-suited to full nail extensions (using nail forms or tips) and clients who need extra reinforcement for naturally weak or bitten nails.
Acrylic nails require filing for removal rather than soaking off, which can take more time in the salon.
What's the difference between gel and acrylic in terms of results?
| Feature | Gel | Acrylic |
|---|---|---|
| Application | Applied in layers, cured under lamp | Mixed liquid + powder, air-dries |
| Finish | Glossy, natural-looking | Can be matte or glossy; can look more "done" |
| Flexibility | More flexible, moves with nail | Harder and more rigid |
| Durability | 2–4 weeks; chips less than regular polish | Very durable; longer wear between fills |
| Removal | Soft gel soaks off; hard gel files off | Files off (or soaks off with some systems) |
| Smell during application | Minimal | Strong monomer odour |
| Extensions | Possible with hard gel or BIAB | Very well-suited; industry standard for extensions |
Which is better for clients?
There's no universal answer — it depends on the client's lifestyle and nail goals.
Gel (including BIAB) tends to suit clients who:
- Want a natural-looking result
- Have flexible or thin nails that benefit from a strengthening overlay
- Prefer a product that moves with their nail rather than sitting rigidly on top
- Want easier removal (for soft gel systems)
Acrylic tends to suit clients who:
- Want significant length or dramatic extensions
- Have very weak, bitten, or damaged nails that need strong reinforcement
- Are comfortable with regular fill appointments
- Want maximum durability for hands that do a lot of physical work
What about BIAB — is it gel or acrylic?
BIAB (Builder in a Bottle) is a type of hard gel — so it sits firmly in the gel category. It's a thick, viscous product applied with a brush and cured under an LED lamp. Despite the name, it doesn't involve a bottle in the traditional sense; the term refers to the all-in-one convenience of having builder gel in a single product rather than mixing components.
BIAB has become extremely popular in Australia over the last few years because it strengthens the natural nail without the bulk of a full extension system. Many clients use it as a natural nail overlay rather than as an extension.
Which should I learn first as a nail technician?
Most nail technology training covers both systems. At Bela Beauty College, the Nail Technology Course covers acrylic, gel, and BIAB — giving you the full toolkit to serve a wide range of clients from day one.
If you already have some nail experience and want to deepen your builder gel skills specifically, the BIAB Nail Masterclass Webinar is a focused option that takes you through the technique in detail.
For students who want to go further, the Nail Bundle combines the core Nail Technology Course with Nail Art, giving you both the technical foundation and the creative skills that today's clients are looking for.
Can I specialise in just one system?
Yes — many working nail technicians focus primarily on gel services (especially BIAB) because of client demand. However, learning both systems gives you more flexibility and makes you more bookable, particularly if you want to serve clients who request extensions or have specific preferences.
Understanding both gel and acrylic also makes you a better technician overall — you'll know when to recommend one system over the other based on what's actually best for the client's nails.
Frequently asked questions
Are gel nails safer than acrylic?
Both systems are safe when applied correctly by a trained technician. Acrylic monomers have a strong smell and some people are sensitive to them; gel products are generally lower-odour. Proper preparation, application, and removal technique matters more than the product system chosen.
Do gel nails damage your nails more than acrylic?
Nail damage from either system usually comes from incorrect removal rather than the product itself. Peeling or picking off any nail coating — gel or acrylic — can damage the nail plate. Proper soak-off or file-off technique is part of what you learn in a nail technology course.
Is BIAB the same as builder gel?
Yes. BIAB is a branded term (originally from The Gel Bottle Inc.) that has become used generically to describe builder-in-a-bottle gel products from any brand. All BIAB products are a type of hard/builder gel, cured under UV or LED.
How long do gel nails last compared to acrylic?
Both systems typically last 2–4 weeks before a fill or rebalance is needed, depending on nail growth rate and lifestyle. Acrylic is sometimes considered more durable for very long extensions or high-wear situations.
Do I need different tools for gel and acrylic?
Yes — gel application requires a UV or LED lamp, while acrylic does not. Both require files, buffers, and prep tools, but the brushes and application systems differ. Your course kit will include what you need for the system(s) you're studying.
Which system is more popular in Australia right now?
BIAB and soft gel polish are currently very popular in Australian salons, particularly for natural nail overlays and shorter styled nails. Acrylic remains the go-to for clients who want significant extensions. Having both skills keeps you bookable across all client preferences.
Ready to learn both systems?
The Bela Beauty College Nail Technology Course covers acrylic, gel, and BIAB so you can confidently serve any client who sits in your chair. It's fully online and self-paced — you study when it suits you and practise on real models at your own pace.
Explore the full range of nail courses and bundles to find the combination that suits your goals.
