If you're thinking about offering nail services — or you're already a technician deciding what to learn next — you've almost certainly come across the BIAB vs gel debate. Both are huge in Irish salons right now. Both are in high demand. But they're very different products that serve very different purposes. Here's a straight breakdown of what sets them apart, who each one is right for, and which you should probably learn first. WHAT ARE GEL NAILS? "Gel nails" is a broad term that covers several different products. The two most common in Irish salons are: Gel polish. A thin, flexible, coloured gel applied in layers over the natural nail and cured under a UV or LED lamp. It looks like regular nail polish but lasts 2–3 weeks without chipping. Applied directly to the natural nail. Removal involves soaking in acetone. Hard gel / gel extensions. A thicker, stronger gel used to build length and structure. Can be sculpted over a form or applied over a tip. Creates dramatic length. Cannot be soaked off — must be filed down. Requires significantly more skill and practice to master. When most people say "gel nails" in everyday conversation, they typically mean gel polish. When a nail tech says it, they might mean either. WHAT IS BIAB? BIAB stands for Builder In A Bottle. It's a medium-to-high viscosity soak-off builder gel that comes in a brush bottle — hence the name. It was popularised by The Gel Bottle Inc. but the technique is now available across many product lines. BIAB sits between gel polish and hard gel in terms of thickness and durability. It's applied over the natural nail to: • Strengthen and reinforce thin or damaged nails • Create a structured apex (the highest point of the nail) for improved longevity • Add a small amount of length if needed • Provide a base for gel polish colour on top The result is a treatment that lasts significantly longer than gel polish, causes less damage to the natural nail than acrylics, and can be maintained with infills rather than full removal every visit. BIAB VS GEL NAILS: THE KEY DIFFERENCES BIAB Gel Polish Thickness: Medium-thick — builds structure Thin — colour only Durability: 4–5 weeks+ 2–3 weeks Maintenance: Infills every 3–4 weeks Full soak-off and reapplication Nail health: Strengthens natural nails Neutral — no structural benefit Removal: Soak-off with acetone Soak-off with acetone Learning curve: Moderate — needs practice Low — beginner friendly Price (Ireland): €50–€80 application €30–€55 application Client return: Very high — infills every 3–4 weeks High — reapplication every 2–3 weeks WHICH IS BETTER FOR NAIL HEALTH? BIAB wins here. Because it creates a protective layer over the natural nail, clients who struggle with thin, peeling, or brittle nails often find BIAB transforms the health of their nails over time. The structure it adds means the natural nail is supported rather than exposed. Gel polish is neutral — it doesn't damage nails if applied and removed correctly, but it doesn't strengthen them either. The damage from gel polish usually comes from poor prep, over-filing, or picking/peeling during removal rather than the product itself. WHICH IS BETTER FOR THE NAIL TECH'S BUSINESS? Both are excellent services to offer, but for different reasons: Gel polish is the lower barrier entry point. It's faster to learn, requires less equipment, and is a great starting service with high treatment volume potential — quick appointments, regular returns. BIAB commands a premium price, builds extremely loyal clients (because the results are so good), and generates regular infill bookings. Once a client switches to BIAB they rarely go back. It's also the treatment driving the most word-of-mouth referrals in Irish salons right now. WHY BIAB IS IRELAND'S MOST IN-DEMAND NAIL TREATMENT RIGHT NOW BIAB has taken off in Ireland faster than almost anywhere else in Europe. Key reasons: • Irish clients want results that last — BIAB delivers that more consistently than gel polish • Social media has driven massive awareness of the "Builder in a Bottle" look across TikTok and Instagram • Nail technicians who offer BIAB are consistently booked weeks in advance • The infill model creates recurring revenue — clients return every 3–4 weeks rather than only when they want a change SHOULD YOU LEARN GEL POLISH OR BIAB FIRST? The honest answer: learn both, and start with gel polish if you're a complete beginner. Gel polish teaches you the fundamentals — prep, application, curing, and removal. These are the foundation everything else builds on. Once you're confident with gel polish, BIAB is a natural next step that immediately lifts your earning potential. If you already have some nail experience, go straight to BIAB. It's where the demand is, and it's where the money is. The Build a Beautiful Nail Bundle covers both BIAB and Gel Polish for €150. It's designed exactly for this progression and is the most popular course combination on this platform: nailandbeautyonlinecourses.ie/bundles/build-beautiful-nail HOW TO LEARN BIAB ONLINE IN IRELAND The BIAB Online Course covers nail anatomy, prep, full BIAB application, apex building, infills, and removal. AIT and ABT accredited — so you can get insured and start taking paying clients on completion. nailandbeautyonlinecourses.ie/courses/biab-nails-online-course 94 video lessons. Lifetime access. Beginner-friendly. Already know BIAB and want to add gel polish too? The Gel Polish Online Course is a great companion: nailandbeautyonlinecourses.ie/courses/gel-polish-online-course