Gel nails are the most popular thing we do — and the most confusing to shop for. Gel polish, Shellac, BIAB, builder gel, hard gel, Bio Gel: the words get used interchangeably, and they do not all mean the same thing. This is our plain-English guide, from our nail salon at 317 King Street West in downtown Toronto.
Below is what each one actually is, how long it lasts, who it suits, and how to look after it — so you can walk in knowing exactly what to ask for.
In this article
Why gel, and why the confusion
All gels share one idea: the product is painted on and then cured (hardened) under a UV or LED lamp, giving a glossy, durable finish that does not smudge on the way home. The confusion comes from the fact that some gels are only colour, some add strength, and some build length — and several popular names are actually brands, not categories.
Gel polish (and Shellac)
Gel polish is a thin, coloured gel cured under a lamp. It gives two to three weeks of high-shine, chip-resistant colour, but it does not add real strength or length — it is colour, not structure. It is removed by soaking in acetone, never by peeling.
Shellac is simply a well-known brand of gel polish (by CND), so when people say Shellac they usually mean a gel-polish manicure. Best for: natural nails that want long-lasting colour and shine.
BIAB and builder gel
BIAB stands for Builder In A Bottle — a soft-to-medium builder gel applied as a protective overlay on your natural nails, or over very short tips. It adds strength and a smooth layer without the bulk of full extensions, and it is popular for protecting natural nails while they grow. It typically lasts three to four weeks and is gentle when removed properly. Best for: anyone growing out their natural nails or wanting durability with a natural look.
Hard gel and nail extensions
Hard gel is a stronger, more rigid gel used to sculpt length and shape — the basis of many nail extensions. It is very durable and is filed off rather than soaked off. Best for: added length, a specific shape, or a dramatic set.
Bio Gel: brand versus generic
Bio Gel is often used as a generic term, but it began as a brand of soak-off gel known for being lightweight, flexible and kind to the natural nail. In practice, a Bio Gel set is a durable, natural-looking gel overlay or extension that wears well and is easy to maintain with refills rather than full removals. Best for: a long-wearing, natural finish you plan to keep up over time.
A Bio Gel full set — durable, glossy and natural-looking.
Which one is right for you
A quick way to decide:
- Want colour and shine on natural nails, low commitment — a gel-polish manicure (Shellac).
- Want strength while growing out your natural nails, natural look — BIAB or a Bio Gel overlay.
- Want added length or a specific shape — hard gel or Bio Gel extensions.
- Want easy upkeep — a Bio Gel set maintained with refills.
The best system is not the strongest or the trendiest — it is the one that matches your nails, your routine, and how often you want to come back.
Not sure which gel is for you?
Tell us how you use your hands and how often you want to visit — we will recommend the right system at your consultation.
Book your appointment →Longevity, removal and aftercare
As a rough guide, gel polish lasts about two to three weeks, while BIAB and Bio Gel overlays often last three to four weeks or more before a refill. Longevity depends on your nails, your routine and your aftercare.
However you finish, the golden rule is the same: never pick or peel gel off, because it takes a layer of your natural nail with it. Have it soaked off or filed down professionally. Between visits, a little cuticle oil daily and gloves for cleaning go a long way, and rebooking a refill every two to three weeks keeps everything looking fresh.
How to book at TO. Nails Touch
If you are not sure which system suits you, that is exactly what the consultation is for — tell us how you use your hands and how often you want to come in, and we will recommend the right option. You can request your preferred technician when you book, and we are happy to talk you through colours and shapes when you arrive.
Key takeaways
- Gel polish (Shellac) is colour and shine for natural nails — about 2 to 3 weeks, no added strength.
- BIAB and builder gel add strength and protection while your natural nails grow — about 3 to 4 weeks.
- Hard gel builds length and shape and is the basis of many extensions.
- Bio Gel is lightweight and natural-looking, and easy to maintain with refills.
- Never peel gel off — have it removed professionally and keep your nails oiled.
Frequently asked questions
Is gel polish the same as Shellac?
Effectively yes. Shellac is a popular brand of gel polish, so a Shellac manicure is a gel-polish manicure.
What does BIAB mean?
Builder In A Bottle, a builder-gel overlay that adds strength to natural nails without the bulk of full extensions.
Is Bio Gel bad for your nails?
Applied and removed properly it is gentle. Most damage people blame on gel actually comes from peeling it off at home, which lifts a layer of natural nail.
How long do gel or Bio Gel nails last?
Around 2 to 3 weeks for gel polish, and often 3 to 4 weeks or more for BIAB and Bio Gel overlays before a refill.
How should gel be removed?
Have it soaked off or gently filed down by a technician. Never peel or pick it off.
Which option lasts the longest?
Hard gel and Bio Gel sets generally outlast gel polish, especially when maintained with regular refills.
