--- product_id: 592809903 title: "Front Rail Seal XL 5 1/2' EPDM Rubber for Truck Caps—Fills a Height Gap from .488\" to 1\"" brand: "esi" price: "$84.59" currency: USD in_stock: true url: https://www.desertcart.us/products/592809903-front-rail-seal-xl-5-1-2-epdm-rubber-truck store_origin: US region: United States of America --- # 1" width x 1.125" height precision fit Fills height gaps from .488" to 1" Durable EPDM rubber with 3M acrylic foam tape Front Rail Seal XL 5 1/2' EPDM Rubber for Truck Caps—Fills a Height Gap from .488" to 1" **Brand:** esi **Price:** $84.59 **Availability:** ✅ In Stock ## Summary > 🛻 Seal the deal with precision and durability—your truck cap’s new best friend! ## Quick Answers - **What is this?** Front Rail Seal XL 5 1/2' EPDM Rubber for Truck Caps—Fills a Height Gap from .488" to 1" by esi - **How much does it cost?** $84.59 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/592809903-front-rail-seal-xl-5-1-2-epdm-rubber-truck) ## 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 - • **Reusable Seal:** No need to replace every time you remove your cap—built for repeated use and durability. - • **Perfect Gap Filler:** Seamlessly bridges height gaps from .488" to 1" for a flawless truck cap fit. - • **3M Adhesive Backing:** High-quality 3M 4011 acrylic foam tape ensures a secure, long-lasting bond without hassle. - • **Premium EPDM Rubber:** Weather-resistant, flexible material engineered to last through all seasons. - • **Universal Fit for Truck Caps:** Designed to work with a wide range of truck caps and camper shells, enhancing versatility. ## Overview The ESI Front Rail Seal XL is a high-quality EPDM rubber seal designed to fill height gaps from .488" to 1" between truck sidewalls and front rails, ensuring a secure, weatherproof fit for truck caps and camper shells. Featuring a 1" width by 1.125" height profile and backed by durable 3M 4011 acrylic foam tape, this reusable seal offers universal compatibility and long-lasting protection against dust and water intrusion. Proudly made in the USA, it’s the professional choice for millennial managers who demand both function and style in their gear. ## Description ESI Front Rail Seal XL 5 1/2' EPDM Rubber for Truck Caps—Fills a Height Gap from .488" to 1" ## Features - Measures 1" width x 1.125" height and fills a height gap from .488" to 1" from the sidewalls to the front rail, when mounting a truck cap or camper shell. - If the height of the gap is .251" to .487" install Front Rail Seal (ASIN: B00C0WVV72) - If the height of the gap is .250" or less, just install one Extruded Solutions (ESI) high quality EPDM rubber truck cap seal on all 3 rails (see product description for choices) - Adheres with high quality 3M 4011 acrylic foam tape - No need to replace this seal every time your cap is removed. ## Technical Specifications | Specification | Value | |---------------|-------| | Colour | Black | | Brand | ESI | | Product Dimensions | 29L x 25W Millimeters | | Fit Type | Universal Fit | | Item Thickness | 1.13 Inches | | Surface Recommendation | Truck Bed | | Manufacturer | aftermarket | | UPC | 855433005753 | | Item model number | FRSXL-66R | | Manufacturer Part Number | FRSXL-66R | | Country of Origin | USA | | Item Weight | 227 g | ## Product Details - **Colour:** Black - **Brand:** ESI - **Product Dimensions:** 29L x 25W Millimeters - **Fit Type:** Universal Fit - **Item Thickness:** 1.13 Inches ## Images ![Front Rail Seal XL 5 1/2' EPDM Rubber for Truck Caps—Fills a Height Gap from .488" to 1" - Image 1](https://m.media-amazon.com/images/I/61iM4aASe1L.jpg) ## Questions & Answers **Q: Why is this only 5 1/2 feet long, isn't the truck width about 7 feet wide ?** A: Standard front rail on a pickup is 66” +/-. I used this product on a Ford F-350 crew cab, the front rail seal has done a great job of preventing water permeation on a commercial topper. **Q: Will this work between the truck bed cover and top of tailgate to keep out water?** A: I would get the flap seal that is attached to the bottom of the truck bed cover. **Q: I'm going to have a 1\4" gap on the front rail after installing a new tonneau cover. Will this product compress down to that?** A: It should, that is exactly what I used it for, had a lip on mine too at the front bulkhead that was about 1/4”+|- lowers then the side rails. It filled the gap nicely and keeps wind and the elements from entering the box. **Q: What's the length?** A: 5 1/2 ft long ## Frequently Bought Together - ESI Front Rail Seal XL 5 1/2' EPDM Rubber for Truck Caps—Fills a Height Gap from .488" to 1" - ESI Super Cap Seal XL 20 FT (2 1/8" Width x 1/2" Height x 20' Length) EPDM Rubber for Caps Over 200 lbs - ESI Ultimate Tailgate Seal with Taper Seal 10ft for use with Truck Caps and Tonneau Covers --- ## 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.us/products/592809903-front-rail-seal-xl-5-1-2-epdm-rubber-truck](https://www.desertcart.us/products/592809903-front-rail-seal-xl-5-1-2-epdm-rubber-truck) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-12*