🎁  NEW YEAR FLASH SALE 🎁
KEEPBULL Hard Serum™
KEEPBULL Hard Serum™
KEEPBULL Hard Serum™
KEEPBULL Hard Serum™
KEEPBULL Hard Serum™

Christian S.

Verified Buyer

From 4 to 25 minutes from the first use. Surprising results. No irritation after the first few days, and the bottle is smaller than in the photos on the website—very convenient to put in your pocket and take anywhere.

Rated 4.8/5

23,000+ Happy Customers

KEEPBULL Hard Serum™

Fast-absorbing gel to improve control and endurance in bed.

Last Longer

No Numbing

Easy to Use

NEW YEAR FLASH SALE

Title

Starter

1 Bottle · Ideal for first-time use

$90.00

€49,99 / pz

   Most Popular   

Best Value

2 Bottles · Covers multiple use cycles

$90.00

€34,99 / pz

Maximum Savings

3 Bottles · Long-term carefree supply

$90.00

€33,32 / pz

Expected delivery

Jan 17 - Jan 19
Title

15-Day Money-Back Guarantee

Try Hard Serum for 15 days. If you’re not satisfied with the level of control, you’ll get your money back — no questions asked.

how long does it take to work?

KEEPBULL generally works after 10-15 minutes. Peak effects are reached between 2 and 6 hours and can last up to 10 hours.

will the other person notice?

No: external application, invisible, without odors or streaks.

how many uses do i get from one bottle?

With a 4ml bottle, you can use 20-25 drops at a standard dose of 3 drops. The number of uses decreases as you increase the dose and therefore the strength, depending on how much you need for your situation.

is it safe? are there side effects?

It is natural and complies with European standards. Temporary side effects (e.g., mild tingling) may rarely occur.

can i use it every day?

Yes. It is 100% natural, safe for daily use and compliant with
European standards.

Designed for Control. 
Made to Feel Natural.

More Control

Helps you stay in control when intensity builds.

Easy to Use

Apply before sex, rinse, and you’re ready.

No Numbing

Designed to preserve natural sensation.

Private & Discreet

Neutral packaging with no product details.

How to use Hard Serum

A simple routine you use when you want more control.
No daily commitment, no complicated steps.

Step 1: Apply 2–3 drops

Gently apply a small amount to the desired area.
The serum absorbs quickly and doesn’t leave residue.

Step 2: Wait 10–15 minutes

Give it a few minutes to settle before intimacy.
No need to do anything else during this time.

Step 3: Rinse & Go

Rinse with water and continue as usual.
Sensation feels natural — you simply have more control.

Expected delivery

Jan 17 - Jan 19
Title

Why Hard Serum Is Different

Most solutions come with trade-offs. Hard Serum doesn’t.

Other Solutions

On-Demand Use

Keeps Sensation Natural

Applied Only Where Needed

No Pills or Supplements

Simple, Discreet Routine

Designed for Real Moments

This Is What Men Actually Want

KeepBull isn’t for men who want to “last a little longer.”

 

It’s for men who want control.

Real control over their body, the moment, and the experience she never forgets.

 

It’s for the man who wants to:

 

Stop feeling that split-second of panic when intensity rises

Stop wondering if she’s satisfied or just being polite

Stop hearing that quiet voice that says “you lost it again”

 

And replace it with certainty.

 

Certainty that you decide when it ends.

Certainty that she feels wanted, taken, and completely absorbed in the moment.

Certainty that when she talks about you later, it isn’t with sympathy — it’s with desire.

 

When you’re in control, you don’t rush.

You don’t hesitate.

You don’t apologize with words or excuses.

 

You lead.

 

And that changes everything.

Why Hard Serum Is Different

45% of men say they struggle to maintain control when it matters most.

 

It’s not about confidence.
It’s not about experience.
It’s physiology.

And yet, almost no one talks about it.

30-Day Money-Back Guarantee

Try Hard Serum for 30 days. If you’re not satisfied with the level of control, you’ll get your money back — no questions asked.
Expected delivery Jan 15 - Jan 17
Title

Testimonials

Your Questions Answered:

How long does it take to start working?

KEEPBULL generally starts working after 10–15 minutes. The peak effect is reached between 2 and 6 hours and can last up to 10 hours.

How long does it last after application?

The benefits typically last between 6 and 10 hours.

Can I use it every day?

Yes. It is 100% natural, safe for daily use, and compliant with European standards.

Will I lose sensitivity during intercourse?

No. KEEPBULL does not numb. It supports natural control without reducing pleasure.

How long does the effect last? Do I need to reapply every time?

The effect can last up to 10 hours. Reapplication is not necessary if the effect is still present.

Is it safe? Are there any side effects?

It is natural and compliant with European standards. In rare cases, temporary effects may occur (e.g. mild tingling).

If I don’t say anything, can the other person notice?

No. It’s an external application, invisible, with no odor or residue.

I have sensitive skin—am I at risk of allergic reactions?

This is rare. Try a small amount first and wait 24 hours. Discontinue use if irritation occurs.

What happens if I accidentally apply too much?

It’s not dangerous, but the effect may last too long. Rinse with lukewarm water and reduce the amount next time.

Can I use it together with lubricant?

Yes. After full absorption, it is compatible with common lubricants.

Do I need a prescription?

No prescription is required. Consult a doctor if you have specific medical conditions.

How many uses can I get from one bottle?

With a 4 ml bottle, you can get 20–25 uses at a normal dose of 3 drops. The number of uses decreases if you increase the dose and potency, depending on your needs.

Where do you ship?

We ship throughout Italy. Typical delivery is 24–72 business hours, with tracking via email or SMS. These times are indicative and may vary due to factors beyond the seller’s control.

Does this product also increase “size/firmness”?

No. KEEPBULL is not designed to increase size or firmness, but to improve endurance and duration, without changing structure or volume.

Expected delivery

Jan 17 - Jan 19
Title

15-Day Money-Back Guarantee

Try Hard Serum for 15 days. If you’re not satisfied with the level of control, you’ll get your money back — no questions asked.