Invisible glue 0.5-1 Second Fast Drying -EXTRA STRONG- LONG RETENTION up to 8 weeks Eyelash Extension Glue/Adhesive CLEAR COLOR

Eyelash glue cures through a chemical reaction triggered by moisture in the air. The higher the humidity, the faster the glue dries. Conversely, in lower humidity environments, the curing process slows down.

To ensure reliable performance even in low humidity conditions,  low-humidity adhesives are formulated with trace catalytic agents that help accelerate curing. This is the key difference between low-humidity adhesives and standard formulas.

Generally, low humidity refers to a range of 25%–45%.  Adhesives are effective in a wider humidity levels, just the higher the humidity, the faster the glue will cure.

The Curing Mechanism of Eyelash Extension Adhesives

Eyelash extension adhesives are typically based on cyanoacrylate monomers, a class of fast-curing acrylate esters known for their strong adhesion and rapid polymerization. The curing process is fundamentally a moisture-triggered chain reaction, which can be described as follows:

1. Chemical Composition and Reactive Nature

The primary component of lash adhesives is cyanoacrylate (CA), most commonly ethyl cyanoacrylate or butyl cyanoacrylate. These monomers are stabilized in the liquid state by trace acidic inhibitors, which suppress premature polymerization during storage.

In the bottle, cyanoacrylate exists in a metastable equilibrium. Once exposed to moisture in the surrounding air or on the substrate (the natural eyelash), this stability is disrupted, and polymerization is initiated.

2. Moisture-Initiated Anionic Polymerization

The polymerization mechanism of cyanoacrylates is typically anionic chain-growth polymerization, initiated by nucleophiles.

• Initiation:
  The trace amounts of water (H₂O) in the environment undergo auto-ionization, generating hydroxide ions (OH⁻). These anions attack the electron-deficient carbon atom of the cyanoacrylate double bond (activated by the electron-withdrawing cyano –CN and ester –COOR groups).

  CH₂=C(CN)COOR + OH⁻ \;\;\longrightarrow\;\; ⁻CH₂–C^•(CN)COOR

• Propagation:
  The reactive anionic site propagates rapidly, attacking additional cyanoacrylate monomers. This results in rapid chain growth, producing a linear polymer:

  $$⁻CH₂–C(CN)COOR \;+\; n\; CH₂=C(CN)COOR \;\;\longrightarrow\;\; (–CH₂–C(CN)COOR–)_{n+1}^−$$

• Termination:
  Termination occurs either through protonation (neutralization by acidic species) or by chain transfer reactions. In practice, the polymerization is extremely fast, often reaching full solidification in seconds.

3. Influence of Humidity on Curing Kinetics

Because moisture provides the initiating hydroxide ions, relative humidity (RH) plays a crucial role in curing rate:

• High Humidity (>65% RH):
  Excess water vapor accelerates initiation, leading to overly rapid curing. Adhesive may partially cure before proper bonding occurs, causing weak adhesion, blooming (whitening due to side reactions), and stronger odor emission.

• Low Humidity (<40% RH):
  Insufficient water slows down initiation, delaying curing and reducing bonding efficiency. In such cases, specialized formulations with catalytic additives (low-humidity adhesives) or environmental humidification are recommended.

• Optimal Ranges:

  • Standard formulations: 40–65% RH

  • Low-humidity formulations: 25–45% RH

4. Role of Surface Chemistry (pH Effects)

Besides environmental humidity, the surface pH of the substrate (eyelash or skin contact area) can significantly influence curing:

• Alkaline surfaces (higher pH): Provide more nucleophilic sites (OH⁻), accelerating polymerization.

• Acidic surfaces (lower pH): Neutralize anionic initiators, slowing the curing reaction.

This is why pre-treatment agents (primers) with mild alkalinity are sometimes applied to natural lashes, ensuring consistent curing kinetics.

👉 Practical Note: The effectiveness of lash primers depends on their pH. By testing the pH of a primer, one can determine whether it enhances curing (slightly alkaline, beneficial) or potentially has the opposite effect (too acidic, inhibitory).

5. Practical Implications in Lash Application

• Fast curing is beneficial for efficient application but may reduce working time for the technician.

• Slow curing increases risk of poor bonding or lash slippage.

• Adhesive formulations are therefore engineered with stabilizers, plasticizers, and accelerators to balance curing speed, flexibility, and durability under varying environmental conditions.

✅ In summary:
The curing of eyelash extension adhesives is governed by anionic chain polymerization of cyanoacrylate monomers, initiated by trace environmental moisture. Both humidity and substrate surface pH critically determine the curing kinetics, and adhesive formulations are carefully adjusted to optimize performance across different working environments.

✨ Tip for Checking Your Glue ✨
Once opened, glue cannot be returned or refunded — but don’t worry, it’s very easy to check its freshness before you open it!

Just give the sealed bottle a little shake:

• If you hear a clear, watery sound, your glue is nice and fresh.

• If the sound is thicker or less fluid, the glue may have started to age.

• Over time, adhesive naturally becomes more viscous, and the sound will turn softer and less fluid.

We recommend doing this quick “shake test” when you receive your order, so you know your glue is in perfect condition before using it. 💧

💡 Extra Advice: To keep your work at its best, we don’t recommend stocking too much glue at once. Just buy enough for about 1-2 months of use, then reorder when you need more — that way, you’ll always enjoy the freshest adhesive.

👉 Don’t forget: every bottle has its EXP date printed on the bottom, so you can easily check and rotate your stock!

💡 About Storage:
We store all adhesives in large batches at a low temperature (5–10°C) to keep them fresh. But once they arrive to you, storage conditions may be different — meaning the glue’s real shelf life can be shorter than the factory EXP date on the bottle.

👉 That’s also why we recommend: don’t stockpile too many bottles. Just buy enough for 1–2 months of use, then reorder — this way, you’ll always be working with fresh, reliable glue.

How to Store Your Lash Adhesive Correctly

1. Unopened Glue – Long-Term Storage

• Store in a cool, low-temperature environment (5–10°C / 41–50°F).

• This slows down the natural aging process of cyanoacrylate and keeps the glue fresh until you are ready to use it.

• This is how we store glue in bulk at our facility.

2. Opened Glue – After First Use

• Once opened, do not return the bottle to cold storage.

• Moving glue between cold and warm environments causes condensation on the bottle walls (like a car windshield fogging up in winter).

• These tiny water droplets can trigger premature curing inside the bottle, making the glue thick or unusable.

• Instead, store opened glue at room temperature, ideally 15–20°C (59–68°F), in an air-conditioned or stable indoor environment.

• Use within 4–6 weeks after opening for best performance.

3. Common Mistakes to Avoid

❌ Storing opened glue in the fridge → condensation and early curing.
❌ Leaving glue in direct sunlight or near heat sources → rapid aging.
❌ Stockpiling too many bottles → risk of expired or thickened glue.

👉 Best Practice: Buy only enough glue for 1–2 months of use, check the EXP date printed on the bottom of each bottle, and restock as needed. This ensures you always work with the freshest adhesive.

Legal Disclaimer & Safety Notice

⚠️ SAFETY WARNING

• This adhesive bonds skin and eyes within seconds. Avoid all direct contact with skin, eyes, or mucous membranes.

• Keep out of the reach of children and pets.

• Do not dispense or shake the glue near the face or hair, and never point the nozzle toward anyone’s face.

• For professional eyelash extension use only — external use only.

• This product must be handled exclusively by trained, certified, and insured eyelash technicians.

• DO NOT USE THIS PRODUCT FOR SELF-APPLICATION. Improper use can cause severe eye irritation, burning, or injury.

Professional Application Rules

• Clients must keep their eyes closed during the entire procedure.

• The adhesive must never contact the client’s skin or eyes. Strict isolation of natural lashes is required to prevent accidental skin contact.

• Self-application is strictly prohibited.

• The seller assumes no responsibility for misuse. For private-label orders, products are delivered unlabeled, and the buyer is responsible for providing proper labeling before resale.

Emergency Measures

• Eye Contact: Immediately wipe the glue and then flush eyes with clean running water for at least 15 minutes.

• If redness, itching, or burning occurs, discontinue use and seek medical attention immediately.

PRODUCT CHARACTERISTICS

Our glue is a fast-drying cyanoacrylate formula, extremely sensitive to airborne moisture.

• Even small amounts of humidity can trigger premature polymerization.

• To protect product stability, each pouch includes a desiccant pack designed to absorb ambient moisture.

Formula Options

We provide two specialized formulas:

1. Standard Humidity Formula — optimized for 40–60% RH.

2. Low-Humidity Formula — more reactive to limited moisture, suitable for 25–50% RH environments.

• In very dry environments (<40% RH), the glue may polymerize too slowly.

• In high humidity (>65% RH), it may cure too quickly, causing blooming (whitening) or reduced bonding strength.

QUALITY CONTROL & CUSTOMER CHECK

You can quickly assess glue freshness upon arrival:

• Shake the sealed bottle gently.

  • If you hear a clear, watery sound, the glue is fresh.

  • If the sound is dull or sluggish, the glue may have aged.

If the glue seems aged upon arrival, do not open the bottle. Record a short video of the shaking test and contact us for a replacement.

⚠️ Please note: Once opened, glue is non-returnable.

USAGE & STORAGE GUIDELINES

During Use

• Dispense glue with the nozzle pointed downward.

• Release pressure before turning the bottle upright, to prevent residue from remaining in the nozzle.

• Clean the nozzle with a dry lint-free tissue only.

• Close the cap tightly after each use.

Preventing Nozzle Blockage

• Never wipe the nozzle with water or wet materials.

• Never transfer the glue to another container — it will polymerize completely within hours.

• Always store in the original pouch with desiccant, or in an airtight container with desiccant.

After Opening

• Best store at 15–20°C (air-conditioned room temperature).

• Do not return opened glue to refrigeration — condensation can form on the inner walls, triggering premature polymerization (similar to fogging on a car windshield).

Shelf Life

• Factory EXP Date: Based on low-temperature storage (5–10°C) and unopened condition.

• Customer Shelf Life: Once stored at high temperature and high humidity , especially after opening, the actual usable time will be shorter than the EXP date.

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✨ To smartly choose the best lash glue, you need to understand how it actually works.

🧪 Advanced Chemistry of Cyanoacrylate Glue: Polymerization (Visual Concept)

1. Monomer Stage (Liquid in the Bottle)

• Molecular structure: CH₂=C(CN)-COOR

• Small, free-flowing molecules in liquid state.

2. Initiation – Moisture Triggers the Reaction

• Water molecules (H₂O / OH⁻) act as initiators.

• They attack the C=C double bond, opening it up.

• This starts the chain connection.

3. Propagation – Chain Reaction

• One molecule links to the next → rapid chain polymerization.

• Molecular weight increases dramatically within seconds.

4. Polymer Stage (Solid)

• Long-chain polymers are formed.

• The glue instantly transforms from liquid to solid.

👉 This is the exact chemical principle behind why eyelash extension glue can cure and harden within just a few seconds.

QUALITY & COMPLIANCE

✅ Europe REACH Certification passed

Our adhesive has successfully passed the latest Europe REACH test results, complying with REACH Regulation (EC) No 1907/2006.
This is currently one of the strictest chemical safety standards worldwide. Our test covered 233 parameters, and all results were within the safe standard range.

🧪 Chemical Composition Transparency

The production process of cyanoacrylate-based adhesives is chemically complex, involving polymerization reactions and potentially generating hundreds of trace impurities or stabilizing additives.

• MSDS (Material Safety Data Sheets) only disclose the primary ingredients and hazards.

• They cannot fully reflect the actual purity or performance of the adhesive, nor do they guarantee long-term stability.

• This is why independent REACH certification is a critical benchmark of true product safety and quality.