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ESI Ultra Cap Seal 1 1/2" Width x 5/8" Height x 23' Length, EPDM Rubber for Caps Over 200 lbs

4.4 4.4 out of 5 stars 131 ratings
$39.95
FREE Returns
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Purchase options and add-ons

  • 23ft for mounting truck caps or camper shells that weigh over 200 lbs and for heavier weighted caps. Fills all bed rail gaps. Fits all bed lengths.
  • Complete kit includes seal, butyl tape, alcohol pads and detailed instructions
  • Excellent compression set resistance for maximum service life and vibration absorption
  • High quality, long-lasting automotive grade EPDM rubber seal. Preferred by professional installers over PVC/foam seals.
  • No need to replace this seal every time your cap is removed. MADE IN USA
› See more product details

Additional Details

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Customer ratings by feature

Value for money
4.6 4.6
Easy to install
4.1 4.1
Adhesion
3.9 3.9
See all reviews

Frequently bought together

ESI Ultra Cap Seal 1 1/2" Width x 5/8" Height x 23' Length, EPDM Rubber for Caps Over 200 lbs
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Get it as soon as Thursday, May 2
In Stock
Sold by Extruded Solutions, Inc. and ships from Amazon Fulfillment.
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ESI Front Rail Seal XL 5 1/2' EPDM Rubber for Truck Caps—Fills a Height Gap from .488" to 1"
$26.95
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ESI Ultimate Tailgate Seal with Taper Seal 10ft for use with Truck Caps and Tonneau Covers
$27.95 ($2.80/Foot)
Get it as soon as Thursday, May 2
In Stock
Sold by Extruded Solutions, Inc. and ships from Amazon Fulfillment.
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Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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ESI Ultra Cap Seal 1 1/2" Width x 5/8" Height x 23' Length, EPDM Rubber for Caps Over 200 lbs

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Customer reviews

4.4 out of 5 stars
4.4 out of 5
131 global ratings

Customers say

Customers like the performance, ease of cutting, and seal of the seal. For example, they mention it works great, it's easy to cut, and it does a great job of keeping water out. Customers are also impressed with the material, saying it'll last as long as the shell is on it. That said, opinions are mixed on the adhesion.

AI-generated from the text of customer reviews

6 customers mention6 positive0 negative

Customers are satisfied with the performance of the toy. They mention that it works great and is easy to install.

"...Based on some reviews I was leary about the adhesive backing. Worked great for me...." Read more

"...Worked and no problems." Read more

"Worked great, be nice if it was a bit sticky-er" Read more

"Worked perfect, Will never use that cheap foam strip again!" Read more

5 customers mention5 positive0 negative

Customers are satisfied with the seal. They mention that it is a great seal, it does not leak at all, and is thick enough to seal everything well.

"...No leakage at all. The material handles, cuts, and adheres easily." Read more

"...seal seems pretty thick, but at least it has been doing a great job of keeping water out and isolating the shell from flexing of my bed...." Read more

"...was enough length with a little left over, and it was thick enough to seal everything well and even raise the whole cap a little..." Read more

"...Bought cap used. Peeled off old stuff. And used this. No leaks." Read more

4 customers mention4 positive0 negative

Customers are satisfied with the material of the seal. They mention it's heavy duty, has a nice quality, and is built to last. Some say the rubber is super thick and easy to cut.

"Made in USA -woohoo! Awesome product, super thick (about 1/4 w/ 300lbs shell w/ gear on the roof)...." Read more

"Good, heavy duty product. Was right length for my for my full size pickup canopy...." Read more

"I love this seal, very nice quality, easy to cut, does not rip." Read more

"Great adhesive, strong material, 8' camper still had 1' left over..." Read more

3 customers mention3 positive0 negative

Customers find the seal easy to cut. They mention that it does not rip and that the 45-degree angles are easy to handle.

"...No leakage at all. The material handles, cuts, and adheres easily." Read more

"...Clean your topper really good and stick it on, the 45 degree angles were very easy to cut." Read more

"I love this seal, very nice quality, easy to cut, does not rip." Read more

6 customers mention3 positive3 negative

Customers are mixed about the adhesion of the seal. Some mention that it has good adhesive, while others say that it's not very strong and as a result, it'll be hard to get the seal to stay on.

"...No leakage at all. The material handles, cuts, and adheres easily." Read more

"...Didn't give 5 stars because adhesive was not uniform along length of product- when peeling off backing strip, some of the adhesive stuck to it..." Read more

"Good adhesion, easy to install." Read more

"the adhesive isn't very strong and as a result, its hard to get the seal to stay on the canopy when attempting to put the canopy on the truck...." Read more

##RED FLAG JUNK##
1 Star
##RED FLAG JUNK##
Maybe I'm missing something but I thought maybe the rubber itself was supposed to be sticky and not the tape after you pull it off as Pictures SHOW... I cleaned thoroughly with isopropyl alcohol Garbage product and WORST 40$ I ever spent... Now my time frame is jacked because of a faulty product... What's up ESI ??DO NOT BUY !!!!!
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Top reviews from the United States

PGD
5.0 out of 5 stars Works great.
Reviewed in the United States on December 6, 2018
Verified Purchase
I used it to make a seal on a very old aluminum cap which sits on my very old '93 Dodge Ram. No leakage at all. The material handles, cuts, and adheres easily.
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Morgan
5.0 out of 5 stars Great adhesive, strong material, 8' camper still had 1' left over
Reviewed in the United States on March 31, 2024
Verified Purchase
Exactly what I needed. The roll of dum dum / butyl tape was a very nice, unexpected touch. Filled the gap where I cut to make the 90's.
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Amazon Customer
5.0 out of 5 stars Mutch better than any auto parts product
Reviewed in the United States on August 14, 2016
Verified Purchase
Exactly as advertised! Based on some reviews I was leary about the adhesive backing. Worked great for me. Just follow the instructions and clean the mounting surface of your cap. I used more alcohol than provided and initial tack was better than expected. I also used some lumber and several clamps to really press the seal against my cap prior to installing on my truck. Maybe that was overkill but like I said, I was leary based on some prior reviews.
One person found this helpful
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rainman
4.0 out of 5 stars This seal's the real deal
Reviewed in the United States on February 14, 2016
Verified Purchase
I had plenty of material for an 8-foot bed (2011 Silverado). I used this for my high-rise camper shell, which is very heavy. This seal seems pretty thick, but at least it has been doing a great job of keeping water out and isolating the shell from flexing of my bed. I would recommend this seal.
One person found this helpful
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Amazon Customer
3.0 out of 5 stars Two person job.
Reviewed in the United States on November 2, 2021
Verified Purchase
Hard to line up and the butal tape provided doesn't hole the gasket in place very well especially if it's a heavy fiberglass canopy and your working alone.
Recommend having someone to help you.
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james g.
5.0 out of 5 stars Great Product
Reviewed in the United States on July 17, 2022
Verified Purchase
Well i guess im the luck one, this worked out great for me and very happy with this product. Clean your topper really good and stick it on, the 45 degree angles were very easy to cut.
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reader1
5.0 out of 5 stars Thick and sticky
Reviewed in the United States on July 9, 2021
Verified Purchase
No more leaks
One person found this helpful
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Christian John Malcolm
5.0 out of 5 stars American Made Innovation
Reviewed in the United States on December 24, 2014
Verified Purchase
Made in USA -woohoo! Awesome product, super thick (about 1/4 w/ 300lbs shell w/ gear on the roof). This rubber is built to last... no doubt, will last as long as my shell is on the truck. I've hammered my truck on a few outback style offroad trips and the cushion between the shell and my truck is amazing. Great job to Extruded Solutions. It is totally worth the premium for this American made product. I bought several of their other sealers... affordable and good stuff.
One person found this helpful
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Top reviews from other countries

Joe
5.0 out of 5 stars Decent first impression
Reviewed in Canada on July 4, 2023
Verified Purchase
We will see how the seal performs. First impression is that is a decent product and purchase.
Customer image
Joe
5.0 out of 5 stars Decent first impression
Reviewed in Canada on July 4, 2023
We will see how the seal performs. First impression is that is a decent product and purchase.
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Amazon Customer
5.0 out of 5 stars Five Stars
Reviewed in Canada on December 20, 2016
Verified Purchase
Worked geat
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Amazon Customer
4.0 out of 5 stars good
Reviewed in Canada on April 15, 2024
Verified Purchase
we wound up using a heating gun to activeate the adhesive, other wise good
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