Builder Gel Vs BIAB: Which Course Fits Your Clients’ Needs?
When it comes to creating long-lasting nails, two products always spark conversation among nail pros: builder gel and BIAB. Both are salon favourites that deliver strength and style, but they work in slightly different ways.
Thinking about taking a BIAB or builder gel course online? This guide will help you understand their key differences and decide which one will best develop your expertise and support your clients’ goals.
What you’ll learn in a builder gel course

Builder gel is a thick and durable product designed to add structure to the natural nail. Unlike regular gel polish, builder gel can be used to create overlays or even extend the nail using forms or tips.
In an online builder gel course, you’ll learn how to shape, reinforce and customise looks to suit different client needs. Training takes you through preparation to application and safe removal.
What to expect in a BIAB course
BIAB, or Builder in a Bottle, is a self-levelling gel used to protect natural nails. Unlike traditional builder gel that requires more sculpting, BIAB applies easily with a brush, making it a quicker option for nail techs.
In a BIAB gel nail course for beginners, you’ll learn how to apply the product correctly, create smooth overlays and achieve a natural-looking finish. Training also covers essential skills such as maintenance, performing infills and carrying out full removals.
Choosing between BIAB and builder gel

When deciding whether to take a builder gel course or a BIAB course, it helps to think about the clients you’re serving and the results they’re asking for. Each system has its strengths, so matching the product to the right client will help you deliver the best results.
- When a builder gel course is best
An online builder gel course is the right choice if your clients often need extra strength and structure. BIAB is especially valuable for reinforcing weak or brittle nails with a durable overlay or for creating dramatic shapes that stand out. This training also suits nail pros who want to expand their creative options and offer more personalised designs.
- When a BIAB course is a better fit
Take a BIAB accredited course if you want to offer services that keep natural nails intact while adding extra protection. The system is flexible enough to move with the nail, making it ideal for everyday wear and reducing the risk of breakage. It’s also a valuable skill if you work with clients who are transitioning from acrylics or allowing their nails to recover from damage but still want a polished, salon-quality finish.
Enrol in an online gel polish course at NSI Australia
There’s no one-size-fits-all answer when it comes to builder gel vs BIAB; it really depends on your clients’ needs. Both skills are valuable for today’s nail professionals, and whichever path you take can help advance your career and give you a competitive edge.
At NSI Australia, we offer a range of online gel polish courses for both beginners and experienced nail techs looking to refresh their skills. Our training covers everything from nail prep and hygiene to proper application and maintenance. We also offer courses to help you master mani essentials, including BIAB vs acrylic techniques, along with bonus nail art lessons. Each course is self-paced and delivered online, so you can study anytime, anywhere. Once completed, you’ll receive a certificate to showcase your new skills.
When you enrol in one of our courses, you have the option to add a gel kit for hands-on practice. You can also browse our online range of gel products, including hard gels, soft gels and base and top coats.