--- product_id: 15950340 title: "ESI Ultra Cap Seal 1 1/2\" Width x 5/8\" Height 20' Length, EPDM Rubber for Caps over 200 lbs" brand: "esi" price: "£43.87" currency: GBP in_stock: true reviews_count: 8 category: "Esi" url: https://www.desertcart.co.uk/products/15950340-esi-ultra-cap-seal-1-1-2-width-x-5 store_origin: GB region: United Kingdom --- # 20ft length for full bed coverage Compression set resistance for lasting fit EPDM rubber for superior durability ESI Ultra Cap Seal 1 1/2" Width x 5/8" Height 20' Length, EPDM Rubber for Caps over 200 lbs **Brand:** esi **Price:** £43.87 **Availability:** ✅ In Stock ## Summary > 🚛 Seal the deal with the ultimate truck cap protection! ## Quick Answers - **What is this?** ESI Ultra Cap Seal 1 1/2" Width x 5/8" Height 20' Length, EPDM Rubber for Caps over 200 lbs by esi - **How much does it cost?** £43.87 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/15950340-esi-ultra-cap-seal-1-1-2-width-x-5) ## Best For - esi enthusiasts ## Why This Product - Trusted esi brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless 20ft Coverage:** Fits all standard 8ft truck beds with precision trimming options - • **Complete Installation Kit:** Includes butyl tape, alcohol pads, and detailed instructions for hassle-free setup - • **Vibration Absorption Mastery:** Reduces noise and wear with excellent compression set resistance - • **Made in USA Quality Assurance:** Crafted domestically with a 90-day warranty for peace of mind - • **Professional-Grade EPDM Rubber:** Preferred over PVC/foam for unmatched longevity and weather resistance ## Overview The ESI Ultra Cap Seal is a 20-foot long, 1.5-inch wide EPDM rubber seal designed specifically for truck caps and camper shells weighing over 200 lbs. Engineered for durability and superior vibration absorption, it fills all bed rail gaps on 8ft beds and comes with a complete installation kit. Made in the USA, this professional-grade seal offers long-lasting performance preferred by installers, eliminating the need for frequent replacements. ## Description For truck caps that require more than 20ft of seal use Ultra Cap Seal 23ft. Easily trims in half to fit trucks with smaller width front bed rails. NOTE: To determine if you need to use a Front Rail Seal 6ft, measure the difference in height from the truck's side bed rails (including, if any, bed rail caps) to the truck's front bed rail. If the height of the gap is less than .488" install Ultra Cap Seal only. If the height of the gap is extra-large, from .488" to .974" install Ultra Cap Seal 20ft or 23ft on the cap's front and side base rails and install Front Rail Seal XL on the truck's front bed rail. Made in USA Review: Great product - This has been a great seal and much better than that cheap crap the auto parts stores stock. Review: Worked perfect for my camper swap. - I needed a new seal to swap my camper from my old Jeep to the new one and this did exactly what I needed it to. ## Features - 20ft seal for mounting truck caps and camper shells that weigh over 200 lbs and heavier weighted caps. Fills all bed rail gaps. For 8ft beds purchase ASIN: B00MPMBIZW - 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. Preferred by professional installers over PVC/foam seals. - No need to replace this seal every time your cap is removed. MADE IN USA ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00NCCDXJ8 | | Best Sellers Rank | #201,205 in Automotive ( See Top 100 in Automotive ) #524 in Automotive Weather Stripping | | Brand | ESI | | Brand Name | ESI | | Color | Black | | Customer Reviews | 4.5 out of 5 stars 196 Reviews | | Item Dimensions L x W | 1.5"W | | Item Thickness | 0.63 Inches | | Item Weight | 1.1 Pounds | | Manufacturer | Extruded Solutions | | Manufacturer Part Number | UCS-20R | | Manufacturer Warranty Description | WARRANTY: Extruded Solutions, Inc. | | Material | Ethylene Propylene Diene Monomer Rubber | | Material Type | Ethylene Propylene Diene Monomer Rubber | | Model Number | UCS-20R | | Number of Items | 1 | | Product Dimensions | 1.5"W | | Recommended Uses For Product | Truck | | UPC | 855433005333 | | Unit Count | 20 Feet | ## Product Details - **Brand:** ESI - **Material:** Ethylene Propylene Diene Monomer Rubber - **Color:** Black - **Product Dimensions:** 1.5"W - **Item Thickness:** 0.63 Inches ## Images ![ESI Ultra Cap Seal 1 1/2" Width x 5/8" Height 20' Length, EPDM Rubber for Caps over 200 lbs - Image 1](https://m.media-amazon.com/images/I/71gXpwDItML.jpg) ![ESI Ultra Cap Seal 1 1/2" Width x 5/8" Height 20' Length, EPDM Rubber for Caps over 200 lbs - Image 2](https://m.media-amazon.com/images/I/41TCORBa5jL.jpg) ![ESI Ultra Cap Seal 1 1/2" Width x 5/8" Height 20' Length, EPDM Rubber for Caps over 200 lbs - Image 3](https://m.media-amazon.com/images/I/31ceJlWallL.jpg) ![ESI Ultra Cap Seal 1 1/2" Width x 5/8" Height 20' Length, EPDM Rubber for Caps over 200 lbs - Image 4](https://m.media-amazon.com/images/I/61EJpEwx3gL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product *by K***H on October 30, 2025* This has been a great seal and much better than that cheap crap the auto parts stores stock. ### ⭐⭐⭐⭐⭐ Worked perfect for my camper swap. *by S***N on November 1, 2025* I needed a new seal to swap my camper from my old Jeep to the new one and this did exactly what I needed it to. ### ⭐⭐⭐⭐⭐ Great product *by R***N on September 24, 2025* Great product, but 5’ shorter that what i got years ago --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/15950340-esi-ultra-cap-seal-1-1-2-width-x-5](https://www.desertcart.co.uk/products/15950340-esi-ultra-cap-seal-1-1-2-width-x-5) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-10*