BL Black Diamond Coating Sealant - 7ml

Buy now, pay later with
  • Afterpay
  • Klarna
  • Zip Logo

Protects Extensions & Improves Retention!

Protect your clients lashes and your business with BL Lash's Black Diamond Coating Sealant.

This sweet smelling, lash sealant provides a layer of black tint (similar to mascara) that helps to protect and maintain the bond between the natural lash, glue and extensions. Leaving your clients with fuller lashes for longer.


  • Protects the adhesive bond
  • Extends life of extensions
  • Buy in bulk and retail in your salon

 Vegan Ingredient IconCruelty Free Icon


(Click the 'Bulk Options' menu to see prices)

Black Diamond Coating Sealant is both ideal as a great finishing touch to your extension process and also perfect to retail to your clients as an aftercare product that will help extend the life of their extensions.

  • 5 Units: Save 13% (Your Profit = $75*)
  • 10 Units: Save 26% (Your Profit = $180*)

*Based on selling at below RRP

RRP: $34.95



  • Allow extensions to fully dry (use gentle fan if necessary)
  • Dip a clean, sterilised mascara wand into the sealant
  • Brush gently across the top of the lashes as you would apply a mascara


  • Apply by gently brushing the top of the lashes using the brush provided
  • Repeat application approximately every 2-3 days 

Water, Alcohol, PYP, Nonoxynol-12, Sodium Hyaluronate, Gardenia Florida Fruit Extract, Phenoxyethanol, Methylparaben, Ethylparaben, Butylparaben, Propylparaben, Disodium, EDTA, Dextrin



Orders within Australia are sent express via Australia Post for a flat rate of $8.95 (Free for orders over $100)

Orders placed before 1pm Melbourne time are dispatched same day and most parcels arrive within 2-3 business days


International Orders are sent via International Express (Please check here for estimated times)

Visit our shipping information page for more details


Any items in unused condition can be returned within 60 days of purchase for store credit. (This excludes Adhesives, Sale & Clearance items)

Visit our returns and refunds page for more details

    DISCLAIMER: With the exception of our Aftercare & Retail Range our products are intended for PROFESSIONAL USE ONLY. My Lash Store accepts no responsibility for the misuse of our products.

    Customer Reviews

    Based on 21 reviews
    Gemma Duncan

    BL Black Diamond Coating Sealant - 7ml

    This literally saved my lashes

    I read the reviews and thought that many people couldn’t be lying. I also didn’t think it was possible to make my lashes as long as they have. This sealant has literally changed the game, absolutely amazing

    Michelle McGeary
    Excellent product

    I have trouble keeping lashes on but this product has really helped definitely buy again

    Lashes are lasting FOREVER - less refills now

    So I was dubious about this, most things are a hype and don't live up to what you expect, so I was dubious. I normally am 2 weeks between refills as they fall out to almost nothing by that time. I am now easily 3.5 weeks and when I am turning up there is minimal refills being put in. They are just lasting so well, so much more than I anticipated and I swim too. I am religious in putting it on in the morning, waiting until dry and then lightly brushing through. I am so thrilled with this product I have told my friends who are getting their lashes done also. My lash lady a little less happy as I am coming in less now, but at least they are lasting so well. In the past two weeks I think I have seen 4 lashes fall out, can't see any in the bed or on the pillow. This stuff really does work, you will not be disappointed.

    Tanya Rutherford
    Black Diamond rocks

    Got this to help retain my lashes between appointments and have been impressed with the retention obtained by the extra sealing. Highly recommend this product.

    Results 👌

    The best sealant I've come across. It does protect the bonds of the glue resulting in better retention and healthy lashes

    Rosalinde Roos
    Brilliant & fantastic

    I purchased this sealant after I found my lashes to be falling out faster then normal due to have my makeup removed and applied more then usual (due to studying in a makeup course).. and this has changed my eyelash game... it made a huge difference when it came time for refills and will definitely be purchasing again and again... thank you

    Taniya Fidge
    Oily lids? Patchy lashes? Pillow friends in the morning0?

    I suffered with all these things and was about to give up on lash extensions when I discovered this sealant. Now I've got longer , fuller retention and a glossy more natural look and piece of mind they aren't going anywhere as fast -
    (" Are they real? Are they extensions ? ")
    Such an inexpensive product that delivers. As a bonus the packaging is beautiful. Don't bother doing any more google searches- this is the one you want !