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4.9/5 Excellent | Based on 2,000+ Reviews

Kill Nail Fungus at the Root — Not Just the Surface

Fungus lives under the nail and around the nail bed — where creams can’t reach. This pen delivers 25% Undecylenic Acid right where it matters.

🦠 Targets fungus beneath the nail — where creams can’t reach
🚫 Stops yellowing, thickening & crumbling at the source
🖊️ Precision pen application — fast, clean, targeted
🛡️ 90-day money-back guarantee — risk-free to try

*Most customers see improvement in 2–6 weeks ; full healthy nail regrowth can take longer.

Worldwide shipping
Worldwide shipping
90-Day Money-Back Guarantee
90-Day Money-Back
Guarantee

The CL Antifungal Pen by CLINQ LABS is a convenient, easy-to-use applicator designed to target nail and skin fungus directly. Its precision tip delivers active antifungal ingredients exactly where needed. Compact and travel-friendly, ideal for daily use on toenails and fingernails.

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"3 years of fungus gone in 8 weeks. I've tried EVERYTHING. This is the only thing that worked."

Sarah K. Verified Purchase Verified Icon
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"After 6 months of hiding my feet, I can finally wear sandals again. This stuff actually works!"

Nicole R. Verified Purchase Verified Icon
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"The thick, yellow nails are GONE. I can't believe something so simple actually worked."

Cathrine S. Verified Purchase Verified Icon

Experience targeted nail health support with CLINQ Labs™ Antifungal Pen, formulated to address nail fungus, discoloration, thickening, brittleness, and nail bed irritation at the source.

Powered by a concentrated antifungal blend, this precision formula helps reduce fungal buildup beneath the nail and around the cuticle — areas where fungus commonly starts and spreads. By supporting a healthier nail environment, it promotes clearer-looking nails and improved nail texture over time.

The easy-to-use pen format allows for direct, mess-free application exactly where it’s needed, helping the active ingredients penetrate the nail and surrounding skin more effectively than traditional creams.

With consistent daily use, users report visibly clearer nails, less thickening and crumbling, reduced discomfort, and renewed confidence showing their hands and feet.

  • No Harsh Chemicals
  • No Fillers or Artificial Dyes
  • Lightweight, Non-Greasy Formula
  • Safe for Daily Use

Step 1: Clean and dry the affected nail thoroughly. Trim the nail if needed to allow better access to the nail surface.

Step 2: Twist the pen and apply a thin layer of the solution directly onto the nail, nail edges, and cuticle area.

Step 3: Allow the formula to absorb completely. Do not rinse. Let it dry for a few minutes before putting on socks or shoes.

Use twice daily for best results. Many users begin noticing improved nail clarity and texture within weeks, with continued improvement over time.

Results after 30 days of use

Reported visibly clearer nail appearance: +92%

Noticed reduced yellowing and discoloration: +89%

Experienced less nail thickening and crumbling: +87%

Reported improved comfort around the nail and cuticle: +90%

* Based on an independent customer survey. Individual results may vary.

Active Ingredient

Undecylenic Acid (25%)
A clinically studied antifungal ingredient commonly used in OTC treatments. Helps inhibit fungal growth on the skin and nails by creating an environment where fungus cannot thrive. Targets nail fungus at its source to support clearer, healthier-looking nails over time.

Inactive Ingredients (Supportive & Conditioning Blend)

Aloe Vera Extract, Sweet Almond Oil, Jojoba Oil, Tea Tree Oil, Manuka Oil, Clove Bud Oil, Lavender Oil, Oregano Oil, Peppermint Oil, Propolis Extract, Tocopheryl Acetate (Vitamin E)

Formulation Standards

  • 25% Undecylenic Acid (OTC Antifungal)
  • OTC Approved Active Ingredient
  • GMP Certified Manufacturing
  • Clinically Studied Active
  • No Water Fillers
  • Designed for Daily Topical Use

All orders are processed and shipped within 1–2 business days (Monday–Friday).

Your order is sent via our express courier service, which includes door-to-door tracking for full visibility.

Average delivery time: 5–10 business days, depending on location.

We want you to feel completely confident in your purchase. If our product doesn’t meet your expectations for any reason, you’re fully protected by our 90-day risk-free guarantee.

Simply email us at INFO@CLINQ-LABS.COM within 90 days of delivery, and we’ll help you with a full refund — no stress, no hassle.

Your satisfaction always comes first.

View full details

Why Nail Fungus Symptoms Are All Connected

If you’re dealing with more than one of these issues — yellow discoloration, thickened nails, crumbling edges, nail lifting, or irritation around the nail — your body is signaling an underlying fungal imbalance that surface treatments often fail to address.

Illustration showing nail fungus beneath the nail

🦠 Targets Fungus at the Source

Nail fungus lives beneath the nail and around the nail bed — not just on the surface.

Illustration of nail regrowth as fungus is reduced

✨ Supports Healthier Nail Regrowth

As fungal buildup is reduced, new nail can grow in clearer, smoother, and stronger over time.

Healthy toenail appearance after consistent care

🛡️ Helps Prevent Recurrence

By reaching where fungus hides, consistent use helps break the cycle of temporary improvement and relapse.

The Science Behind Why It Works

25% Undecylenic Acid — A Proven Antifungal

Most nail fungus treatments are designed for skin, not nails. They sit on the surface and never reach where fungus actually lives.

CLINQ LABS™ uses 25% Undecylenic Acid, one of the strongest over-the-counter antifungals available, in a targeted pen format designed for nail application — helping deliver antifungal action directly to the affected area.

This is why surface creams and low-strength solutions often fail to stop recurring nail fungus.

Suitable for daily topical use as part of a consistent nail care routine.

View full ingredients
Undecylenic Acid (25%) 

Inactive Ingredients (Supportive & Conditioning Blend): 
Aloe Vera Extract
Sweet Almond Oil
Jojoba Oil
Tea Tree Oil
Manuka Oil
Clove Bud Oil
Lavender Oil
Oregano Oil
Peppermint Oil
Propolis Extract
Tocopheryl Acetate (Vitamin E)
            

The Missing Piece:

Targeted antifungal care — addressing fungal growth beneath the nail that drives discoloration, thickening, brittleness, irritation, and recurrence.

Treating the surface alone isn’t a real solution.

By targeting the under-nail environment where fungus thrives, you support healthier nail regrowth over time — so your nails can recover naturally instead of cycling through temporary fixes.

Try CL™ Antifungal Pen Risk-Free
90-day guarantee
90-Day Money-Back Guarantee

Real Results From Real Customers

4.9/5 (2,000+)

Most mention visible regrowth and ease of use

Nothing else reached under my nail

I had tried creams for years, but the fungus always came back. This was the first thing that actually reached under the nail edge. After a few weeks, I noticed the new growth at the base looked clearer.

Mark T. Verified Buyer

You need consistency — but it works

This isn’t an overnight fix, but that’s not how nails work. I used it every day, and around week 4 I could clearly see healthier nail growing in. That’s when I knew it was different.

Laura M. Verified Buyer

I stopped hiding my feet

My nails were thick and yellow for years. I avoided sandals completely. This pen was easy to use, and over time the nail actually started looking normal again. I feel comfortable showing my feet now.

Anna K. Verified Buyer

Restore Clear, Healthy Nails — Fast

Say goodbye to thick, discolored, brittle toenails.
The CLINQ Labs™ Antifungal Pen uses a dermatologist-trusted formula that targets fungus at the root for visible results in weeks.
No foot soaks, no pills — just fast, convenient healing.

Why People Love Our Antifungal Pen

CLINQ LABS™ Reviews
⭐ Verified Customer Reviews

Real People. Real Results.
No More Hiding Your Feet.

4.9
Based on 2,000+ Reviews
5 ★
88%
4 ★
8%
3 ★
3%
2 ★
1%
1 ★
0%
92% report clearer nails
89% would recommend
All reviews verified
MT
Michael T.
Verified Purchase
· Feb 2026
"Skeptic turned believer — the 25% formula is actually different"
I've been burned by so many "maximum strength" products that were just 1% stuff in different packaging. The 25% undecylenic acid here is genuinely different.…
NR
Nicole R.
Verified Purchase
· Mar 2026
"After 6 months of hiding my feet, I can finally wear sandals again"
Pool parties, beach trips, even flip flops to the grocery store — I avoided all of it. The precision tip gets right under the nail edge which makes all the…
Review photo 1Review photo 2Review photo 3
RP
Robert P.
Verified Purchase
· Jan 2026
"My gym locker room embarrassment is finally over"
Used to change shoes in a bathroom stall to avoid anyone seeing my feet at the gym. Used this twice a day for 8 weeks. The nail stopped crumbling completely by…
CS
Catherine S.
Verified Purchase
· Feb 2026
"The thick, yellow nails are GONE. Can't believe something this simple worked."
My big toenail was so thick I thought it was permanent damage. My podiatrist wanted to remove the nail entirely — tried this first as a last resort.…
BeforeProgressAfter
DW
David W.
Verified Purchase
· Dec 2025
"25 years of nail fungus. This is the only thing that ever worked."
I'm 57 years old and have had fungal nails since my 30s. Tried oral medications that made me sick, expensive laser treatments, every OTC product on the market.…
MJ
Marcus J.
Verified Purchase
· Mar 2026
"Works on athlete's foot too — itching stopped in 3 days"
I'm a runner and deal with athlete's foot constantly from gym showers. Bought this for my one discolored toenail but started using it on the skin around my…
BeforeAfter
TM
Tina M.
Verified Purchase
· Nov 2025
"Finally something that travels well AND works"
As someone who travels constantly for work, the pen format is perfect. Fits in my toiletry bag, no leaking, no mess. I've had liquid treatments make a disaster…
AL
Amanda L.
Verified Purchase
· Feb 2026
"My wedding is next month and my nails finally look normal"
Got fungus on my big toenail right after booking my wedding venue. Was panicking about open-toe heels. Started using this 3 months before. By 6 weeks the…
BeforeAfter
JB
James B.
Verified Purchase
· Oct 2025
"Doctor recommended creams failed. This didn't."
My doctor prescribed a prescription-strength cream twice. Both times it came back within weeks. Wasn't willing to do the oral medication route after reading…
LB
Linda B.
Verified Purchase
· Mar 2026
"Bought for my husband, now we both use it — incredible results"
My husband had severe nail fungus on 3 toes. He was skeptical and used it inconsistently at first. Convinced him to commit for 90 days. By month 2 the…
BeforeAfter
PH
Patricia H.
Verified Purchase
· Sep 2025
"I've been hiding my feet for 10 years. Not anymore."
Ten years of wearing closed-toe shoes in summer. Ten years of avoiding pedicures. Tried everything doctors suggested. Started CLINQ and within 6 weeks noticed…
GF
Gary F.
Verified Purchase
· Jan 2026
"Nail was literally separating from the bed. Fixed it."
My big toenail had started lifting from the nail bed — that's how bad the fungus had gotten. Was genuinely worried I'd lose the nail. Used this pen religiously…
BeforeAfter
KO
Karen O.
Verified Purchase
· Aug 2025
"Used it for athlete's foot between toes — cleared in 2 weeks"
Picked this up mainly for my husband's toenail fungus, but I had a nagging athlete's foot situation between two toes that nothing was clearing. Started…
BN
Brian N.
Verified Purchase
· Feb 2026
"Construction worker here — this survived real conditions"
I'm on my feet 10 hours a day in work boots. Developed toenail fungus years ago and could never get rid of it — boots are a breeding ground. Applied this in…
Result
EM
Elena M.
Verified Purchase
· Jul 2025
"Stopped spreading to other nails within weeks"
The fungus started on one nail and I could see it slowly creeping to the nail next to it. That was terrifying. Started using CLINQ immediately on both nails.…
JR
Jennifer R.
Verified Purchase
· Mar 2026
"My pedicurist couldn't believe the transformation"
My nail salon lady has seen my toes for years and always commented on how bad the fungus was. Went back after 3 months on CLINQ and she actually stopped and…
BeforeAfter
TC
Thomas C.
Verified Purchase
· Jun 2025
"My partner noticed before I did — that's how good the results were"
I'd been using this for about 6 weeks and was still not sure if it was working. Then my partner pointed at my foot and said "your nail looks so much better,…
SW
Sandra W.
Verified Purchase
· Jan 2026
"Takes patience but it does work — just not overnight"
Giving 4 stars because I think expectations matter here. If you expect results in 2 weeks you'll be disappointed. But if you stick with it — really commit…
VK
Victor K.
Verified Purchase
· Feb 2026
"Documented my entire 5-month journey — the proof is in the photos"
I took a photo every 3 weeks to track progress. Sharing all 5 milestones here. The change is gradual but undeniable — you can see the clear nail pushing the…
Month 0Month 1Month 2Month 3Month 5
RD
Rachel D.
Verified Purchase
· Mar 2026
"As a nurse I was skeptical — the active ingredient is legit"
I work in healthcare and I'm suspicious of OTC products making big claims. But 25% undecylenic acid is actually a recognized antifungal at concentrations that…
AV
Anthony V.
Verified Purchase
· May 2025
"Beach vacation was actually enjoyable this year"
Every beach vacation for the past 4 years I spent the whole time self-conscious about my feet. This year I started CLINQ 3 months before our trip to Florida.…
MG
Margaret G.
Verified Purchase
· Feb 2026
"Got my life back after 15 years of hiding"
Fifteen years. That's how long I wore closed shoes in summer, avoided swimming pools, made excuses not to get pedicures. I'd given up. My granddaughter asked…
CH
Chris H.
Verified Purchase
· Mar 2025
"Good product, just need to be consistent with it"
Dropped a star not because the product doesn't work — it definitely does — but because I skipped a week and the fungus started coming back. When I'm consistent…
SP
Steve P.
Verified Purchase
· Jan 2026
"Recommended to my entire men's running club"
Runners and toenail fungus go together unfortunately — the warm, damp environment of running shoes is a perfect breeding ground. Three of my running club…
FW
Fiona W.
Verified Purchase
· Mar 2026
"The 90-day guarantee made me try it. The results made me love it."
I'd been burned by so many products I was only willing to try this because of the money-back guarantee. Ordered it thinking I'd return it. By the 30-day mark I…
OA
Oliver A.
Verified Purchase
· Feb 2026
"Used it on both toenail fungus and athlete's foot — cleared both"
Had two problems at once — toenail fungus on my big toe and persistent athlete's foot on my other foot. Used the pen on both. The athlete's foot cleared first,…
Showing 27 of 2,000+ verified reviews

Frequently Asked Questions

How long until I see improvements in my skin?

When used as directed on the skin around the nails, many customers report reilef from symptoms like itching and irritation within the first few weeks. Individual experiences may vary.

How much product do I get in each pen?

One pen can be used to treat multiple affected areas of the skin, including the skin around multiple toes or fingers, depending on usage frequency.

What’s the standard shipping time?

Orders usually ship within 24-48 hours, and delivery typically takes 5–10 business days.

What benefits can I expect?

  • Relief from itching, burning, and irritation caused by athlete's foot and ringworm
  • Support for skin comfort and hygeine around affected areas
  • Easy, targeted application for consistent use
  • Includes moisturizing botanicals to help maintain soft, smooth skin

Is it suitable for men and women?

Yes. Our antifungal formula is designed for adult use and may be used by both men and women to treat common fungal infections like athlete's foot, ringworm, and jock itch. As with any OTC drug, follow label directions and consult a healthcare provider if you have sensitive skin or underlying conditions.

What if I stop using CLINQ?

For best results, it's important to use the product as directed for the full recommended treatment period - even if symptoms improve earlier. Stopping too soon may reduce the effectiveness of the treatment.

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If you don't see results in 90 days, we'll refund you

Step 1: Document your progress
Take a clear photo of your nails before starting treatment, then repeat every month. You’ll notice gradual improvements — less discoloration, smoother texture, and new healthy growth from the base.
Step 2: Apply daily
Use the pen twice a day, morning and night. Apply directly to the affected nail and surrounding skin. Consistency is crucial — skipping days can let the fungus return beneath the nail surface.
Step 3: Stay consistent for 90 days
Commit to at least 90 days of daily use for best results. Most users see visible improvement within 4–6 weeks, while full nail renewal typically takes 3–6 months, depending on nail growth speed.
*When paired with consistent use.