Birkenstock Cork Sealer vs Kelly’s Cork Renew — Applicator, Dry Time & Finish Compared

birkenstock cork sealer vs kelly's cork renew

Cork renew helps keep your Birkenstocks protected from the elements.  Applying cork sealant to exposed cork on your shoes, helps to prevent them from drying out. 

Signs your cork needs resealing (dull, dry edges, tiny cracks)

Cork seal should be used when the cork on your Birks no longer looks shiny or the edges appear dull and dry.

The Products I Tested

I have exclusively used Kelly’s Cork Renew on all my Birkenstocks.  I have been very satisfied with their product.  However, since Birkenstock makes their own cork sealer, I thought I would try it out.  I had a pair of Birkenstocks with dull looking cork, so I decided to do a comparison.  I would seal one shoe with Kelly’s Cork Renew and the other with Birkenstock Cork Sealer.

Brush vs foam: the applicator design is the biggest difference you’ll feel before you even touch the cork.

Bottles of Kelly’s Cork Renew and Birkenstock Cork Sealer side-by-side, showing brush vs foam applicators used to reseal exposed Birkenstock cork.

PRODUCT STATS:

Kelly’s Cork Renew vs Birkenstock Cork Sealer (Side-by-Side)

The built-in brush makes it easy to reach tight spaces between multiple straps and lay down an even coat.

Kelly’s Cork Renew (brush applicator)

Kelly’s Cork Renew comes with a brush.  It goes on evenly and can be used to get in  between smaller areas of cork, when there are multiple straps.  Kelly’s Cork Renew dries in about 10-15 minutes, leaving a high gloss shine.  

Birkenstock Cork Sealer (foam applicator)

Birkenstock Cork Sealer comes with a foam applicator.  The foam applicator is wider than the area that I needed to reseal.  Thus, it was hard to apply the sealer in between multiple straps and it did NOT go on evenly.  I ended up removing the foam applicator and putting the sealer on to an old brush.  The brush was the only way that I could avoid getting sealer on the uppers and the soles.  The foam applicator soaked up the sealer and there was no way to return any of the unused portion into the bottle.  The Birkenstock product took longer to dry compared to Kelly's Cork Renew, about 15-20 minutes.  When the Birkenstock Cork Sealer dried, it resulted in a matte finish. 
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How I Ran the Side-by-Side Test

Here is a video that I made comparing the two products:

Birkenstock Maintenance Tips: Choosing Between Kelly’s and Birkenstock Cork Sealers

Prep, application, and clean-up notes

In my opinion, Kelly’s Cork Renew was the better product.  It was easy to apply, dried quickly, and left a beautiful shine.  I was so disappointed with the matte finish of the Birkenstock sealer that I ended up resealing the test shoe with Kelly’s Cork Renew.  I wanted both shoes to have a matching shine.  

Application Experience: Brush vs Foam

Kelly’s Cork renew has the product down to a science.  Birkenstock’s Cork Sealer is a clumsy product because you end up wasting a lot of sealer and it is messy to apply. I could only see using the Birkenstock sealer if one wanted a more matte finish on their cork.  I prefer the shine offered by Kelly’s Cork Renew.

Verdict: Which Sealer Would I Buy Again?

I usually re-apply cork sealant to my Birkenstocks once or twice a year.  I live in a very mild climate and have several pairs of Birkenstocks in my shoe rotation.  One would likely need to apply Kelly’s Cork Renew more often if one lived in areas exposed to extreme heat or if one wore the same pair on a daily basis.  How often do you reseal your Birkenstocks?  Which product do you prefer?  Send me an email.

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Birkenstock Care, Break-In & Quality Control: Related Blogs You’ll Love

Cork care is one of the most important parts of keeping your Birkenstocks looking fresh and lasting for years.  In Cracked Cork, I explain why small cracks along the footbed are normal signs of wear and how products like Kelly’s Cork Renew or Birkenstock Cork Sealer can keep them from spreading.  That’s why resealing regularly—just like I tested in the blog about about Birkenstock and Kelly's Cork Renew is such an essential step in Birkenstock care.

Of course, cork maintenance is only part of the story.  In Birkenstock Tan Lines: It’s No Laughing Matter, I share why protecting your feet from the sun matters just as much as protecting your cork from drying out.  Meanwhile, Trekking Up Mt Tam in Birkenstocks proves that once broken in and cared for, Birks can even handle a spontaneous hike.

Strap comfort is another big topic.  In The Top of My Feet Hurt from the Arizona Straps, I guide readers through softening stiff uppers and finding the right strap adjustment so soreness fades during the break-in process.  And in Top 10 Birkenstock Mistakes, I call out common missteps like skipping cork resealing, over-tightening straps, or leaving sandals in the sun—all lessons that circle back to why cork care and proper maintenance are so important.

Finally, quality concerns deserve a mention. In Houston, We Have A Problem and Do Better Birkenstock: #dobetterbirkenstocks, I share my frustrations with visible glue, wrinkled leather, and misaligned soles on certain releases.  While I’ll always be loyal to the brand, these posts are a reminder that now more than ever, it’s important to protect the cork and uppers you already own with products like Kelly’s Cork Renew—because Birkenstocks aren’t made the way they used to be, and your vintage pairs are truly valuable treasures.

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Check me out on Instagram for DIY step by step guides to keep your sandals in tip top shape.

These are just a few of the products I use to keep my Birkenstocks looking fresh in my DIY care blogs and videos. Want more tips, tricks, and behind-the-scenes care routines? Follow me on Instagram □ @ilovebirkenstocks

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