The Lash Glue Guide: Which Lash Heaven Adhesive Is Right for You?

Posted by Sylvia Liu on May 23, 2026

Your lashes can be perfect and your technique flawless, but if your adhesive doesn't match your speed, your room or your client, retention will suffer. I want to be honest with you from the start: there is no perfect adhesive. What suits one lash artist beautifully may not suit another at all, and that's fine.

When you're new, a slower glue is the right choice. Working with a 1-second glue while you're still finding your rhythm and your angles would be a recipe for disaster. As you complete more sets you'll naturally wonder whether a faster glue would suit you. Before you switch, ask yourself whether the glue you already have just needs a slightly different approach. Too often we move to a faster adhesive before we're ready, then blame the product.

Three things decide which glue is right for you:

Your speed. The cure time must match how quickly you place each lash. Too fast and it sets before the lash is in place; too slow and the bond is weak.
Your room. Lash glue cures by reacting with moisture in the air. Higher humidity means faster curing, lower humidity means slower, and warmth speeds it up too. Check your humidity with a hygrometer, and check again as the seasons change.
Your client. Some clients are sensitive to adhesive fumes. A low-fume glue is kinder to them.

Our four glues side by side

Glue	Cure time	Best for	Humidity	Temperature	Classic or volume	Retention*	Finish and feel
Fierce Black	0.5–1 sec	Fast, experienced artists and unpredictable studio conditions	45–65% (still cures 30–80%)	20–25°C	Classic and volume	Up to 5 weeks	Black, ultra-thin
Intense Black	1–2 sec	Speed with a long hold; sensitive clients; cooler rooms	40–60%	19–23°C	Classic, hybrid and volume	Up to 6–7 weeks	Deep black, thin
Fierce Clear	1–2 sec	Coloured and brown lashes, where black glue would show	45–65% (still cures 30–80%)	20–25°C	Classic and volume	Up to 6–7 weeks	Clear, ultra-thin
Pearl Black	1–3 sec (about 2 sec in summer, 3 in winter)	Newer artists, first volume sets, warm and humid rooms; the most control	50–70%	20–28°C	Classic, hybrid and volume	Up to 7 weeks	Black, thin

*Retention depends on correct use, prep and aftercare.

All four glues are low-fume and latex-free.

My quick pick: new to lashing or fewer than five clients a week, start with Pearl Black. Lashing daily and want speed with a long hold, Intense Black. Faster than fast, Fierce Black. Working with colour or brown lashes, Fierce Clear.

How to store your glue, and how long it lasts

Unopened, your glue keeps for up to 6 months. Once opened, use it within 2 months. Write the date you open it on the bottle with a marker so you never have to guess.

Before opening

Keep it upright in a cool, dry, dark place, ideally 18–24°C.
An airtight container or a foil pouch with silica gel keeps moisture out.
In a hot climate (over 30°C) you can refrigerate unopened glue. Let it sit at room temperature for an hour before use.

After opening

Reseal tightly every time and store upright.
Keep it away from heat, direct light, air and humidity. An airtight storage container helps.
Never put opened glue in the fridge. Condensation will ruin it.

Every time you use it

Shake with the lid on for 30–60 seconds, by hand or with a glue shaker. Unshaken glue means weak bonds and poor retention.
Put down a fresh drop about every 20–30 minutes, and more often in humid conditions. As soon as the drop turns thicker, gloopy or stringy, add a new one, and never on top of the old drop.
Keep your drop as round as possible. A flat drop dries faster.
When the bottle itself turns stringy, thick or slow, it's time for a new one. If it's still liquid but sticking at the tip, try a spare nozzle first; you may get a few more sets.
Always keep a backup bottle if you lash full-time, so you never run out mid-week.

Troubleshooting

Problem	Likely cause	What to do
Poor retention	Lashes not clean, glue not shaken, glue too fast or slow for your speed, room outside the glue's range	Prime lashes to remove oils and residue. Shake for 30–60 seconds. Check humidity with a hygrometer. Seal the set with Superbonder FIXATION. Teach good aftercare.
Glue curing too fast	High humidity (60%+) or a hot room (over 25°C)	Pick up a little more glue and place faster. Or move to a slower glue such as Pearl Black.
Glue curing too slow	Low humidity (under 35%)	Pick up a little less glue, or move to a faster glue.
Glue thick in a cold room	Room under 18°C	Warm the bottle in your palms, use a humidifier, or switch to a glue that suits cooler rooms such as Intense Black.
Stringy or gloopy glue	The drop has been out too long, or the bottle is past its best	Replace the drop straight away. If the bottle itself is stringy or thick, replace it. Still liquid? Try a new nozzle.
Sensitive clients	Adhesive fumes	All four of our glues are low-fume. Seal with Superbonder FIXATION, which also helps eliminate fumes. Patch test new clients with 5 extensions on one eye, and note down which glue you used.

Before you blame a new glue, give it a fair chance. Check your prep, your client's lash cleanliness and your technique first. In humid weather I use slightly more glue at the base of the lash to give myself working time, and a little less when it's dry.

Questions lash artists ask me

Which glue should a beginner start with?

Pearl Black. Its 1–3 second cure gives you time to place each lash properly, and it's forgiving enough for your first volume sets.

What is the fastest Lash Heaven glue?

Fierce Black, at 0.5–1 second. It's for experienced artists who work at speed, so wait until your placement is confident before switching.

Which glue lasts longest on the client?

Pearl Black, with retention of up to 7 weeks with correct use and aftercare. Intense Black and Fierce Clear give up to 6–7 weeks, and Fierce Black up to 5.

Which glue is best for sensitive clients?

All four of our glues are low-fume, and sealing the set with Superbonder FIXATION helps too. Patch test new clients first: put 5 extensions on one eye and, if you want to compare, 5 with a different glue on the other eye. Note down which eye has which glue.

When should I use clear glue?

Use Fierce Clear for coloured and brown lashes, where black glue would show at the base. For a bold, defined lash line, a black glue is the better choice.

How long does lash glue last once opened?

Use it within 2 months of opening. Unopened, it keeps for up to 6 months; write the opening date on the bottle.

Can I keep my glue in the fridge?

Only unopened glue, and only in a hot climate over 30°C. Never refrigerate an opened bottle, because condensation will ruin it.

Why is my glue drying too fast?

Usually high humidity or a warm room. Pick up a little more glue and place faster, or move to a slower glue such as Pearl Black.

Why is my glue not drying?

Usually low humidity, under about 35%. Pick up a little less glue, or move to a faster glue.

How often should I replace my glue drop?

About every 20–30 minutes, and more often in humid conditions. Change it as soon as it turns thicker, gloopy or stringy, always as a fresh drop rather than on top of the old one, and keep it round, because a flat drop dries faster.