KEEPBULL

Hard Serum™

Made to Feel:

Natural

NEW YEAR SALE

ONLY €49 + Free Shipping!

*Limited Time Offer
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

$91.00

€49,99 / pz

   Most Popular   

Best Value

2 Bottles · Covers multiple use cycles

$91.00

€34,99 / pz

Maximum Savings

3 Bottles · Long-term carefree supply

$91.00

€33,32 / pz

Expected delivery

Jan 18 - Jan 20
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.

Testimonials

David L.

11/19/2025

"Packaging buono, istruzioni chiare, effetto conforme alle promesse. Lo ricomprerò sperando che mantenga la qualità di adesso e non riducono il principio attivo con il tempo.."

Daria L.

@lenagem

"Regalato al mio ragazzo per riprendere la nostra vita sessuale , soddisfattissima! Fate anche qualche prodotto per far arrivare prima noi donne"