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STEP 5: Retention & Speed Booster

20,21 €

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Retention & Speed Booster is one of the  BEST  eyelash products on the market and absolute must-have in every professional lash extension kit! 

Natural lashes can be smooth and silky, which can result in extensions ‘sliding off’. Due to it’s Alkaline qualities, Retention and Speed Booster gently  opens the hair cuticles without damaging the natural lashes, enabling the glue to grab on the cuticles and hold better, improving your retention. 

When the Retention and Speed Booster is applied, natural lashes become “magnetic”. You don't need to hold the extension above the natural lash for a while to make it “grip” - so your treatment time improves significantly. 

If Retention and Speed Booster is applied on the base of the extensions strip, it helps tostop glue running up the fiber and closing the lash fans, making Russian Volume lash application faster and easier.

Retention & Speed Booster:

  • Improves retention 
  • Increases the speed of work 
  • Stops your fans from closing
  • Works with ANY adhesive
  • Cost-effective – 15ml bottle will last you for approx 150 – 200 clients!
  • 3 months of shelf life once opened, 18 months prior to opening
  • Vegan and cruelty free
  • Capacity: 15ml and 2ml (sample size)


How to use

To increase the retention, apply Retention & Speed Booster with a micro brush on natural lashes, after cleanser and primer to slightly open hair cuticles and increase the surface for better grip and adhesion.

To increase the speed of the treatment, apply Retention & Speed Booster with a micro brush on the strip of the extensions in the box or on the lash palette to prevent the lash fan from closing during the "fanning".

IMPORTANT! Do not use on Easy Fanning lashes! Easy Fanning Lashes are made by connecting multiple layers of lashes with a very fine non-cyanoacrylate adhesive. Booster can melt this adhesive, making Easy Fanning lashes difficult to apply.


Product properties

Cruelty-free Retention boosting Vegan
Queens Award 2020
London Lash are proud winners of the Queen's Award 2020

Customer Reviews

Based on 16 reviews
Ushuaia Tholel

het maakt het werken veel makkelijker! en de klanten hebben ook alleen maar positieve feedbacks gegeven.


This product helped me to have an easy work,reduced time,very strong coupling!!!!I’m very impressed of it❤️

Ana Stipić
Love it!

I call it my holy water 😂❤️saved me from closing fans, increased my speed and retention.
I really struggled first half year of my work, Booster changed the game 😎
I always put it on the strip of the extension, every day on every strip and on natural lashes after cleaning 👌🏻


Very glad with this product . My work is better with this . Thank you London Lash !

Faryal Himayat
No more closed fans

I can not do a volume set without booster now! I apply it to the base of the strip of my volume lashes before I start fanning them out. As I apply the glue no longer travels up closing the fans which has made me work so much faster, and my sets look better and better each time! Love love love