Extang MaxSeal™ Tailgate Seal – Premium Truck Bed Protection
Our MaxSeal tailgate seal creates a weather-tight barrier between your tailgate and truck bed, keeping dust, moisture, and debris out of your cargo area. This premium bulb seal installs in approximately 90 seconds with no drilling or special tools required.
We engineered MaxSeal with a durable EPDM rubber construction that withstands extreme temperatures from -40°F to 248°F. The flexible bulb design compresses to form a complete seal while allowing your tailgate to close normally. Whether you're protecting tools, equipment, or personal cargo, MaxSeal delivers professional-grade bed sealing that works with or without a tonneau cover.
What makes MaxSeal different
Installation & Adhesive System
We designed MaxSeal for straightforward installation that takes approximately 90 seconds from start to finish. The seal comes with premium 3M automotive-grade adhesive pre-applied to the mounting surface, eliminating the need for separate adhesives or mechanical fasteners.
Before installation, clean your tailgate contact surface with isopropyl alcohol to remove any dirt, wax, or debris. Peel the protective backing from the adhesive strip and position the seal along the top edge of your truck bed where the tailgate makes contact. Press firmly along the entire length to activate the adhesive bond. We recommend allowing 24 hours for the adhesive to fully cure before exposing the seal to water or extreme temperatures.
Material Properties & Durability
EPDM Rubber Construction
We manufacture MaxSeal from ethylene propylene diene monomer (EPDM) rubber, the same material used in professional automotive weatherstripping applications. EPDM offers superior resistance to UV radiation, ozone exposure, and temperature extremes compared to standard rubber compounds.
The material maintains its flexibility and sealing properties in temperatures ranging from -40°F to 248°F, making it suitable for year-round use in any climate. Unlike cheaper vinyl or foam alternatives, EPDM won’t crack, shrink, or become brittle after prolonged sun exposure. The bulb seal design provides consistent compression force across the entire sealing surface, adapting to normal tailgate wear and alignment variations over time.
Compatibility & Fit Specifications
MaxSeal features a universal design that fits most full-size pickup trucks including Ford F-150, Chevrolet Silverado 1500, Ram 1500, GMC Sierra, Toyota Tundra, and Nissan Titan models. The seal also fits mid-size trucks like the Toyota Tacoma, Chevrolet Colorado, and Ford Ranger.
We offer MaxSeal in custom-cut lengths to match your specific truck bed width. The 5/8-inch bulb diameter provides optimal compression without interfering with tailgate closure or latch operation. The low-profile design sits flush against your bed rail, maintaining a clean appearance that doesn’t detract from your truck’s styling.
Complete Your Truck Bed Protection System
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MaxSeal Tailgate Seal Questions
Installation takes approximately 90 seconds of active work time once your truck bed surface is cleaned. The process involves cleaning the contact area with isopropyl alcohol, peeling the adhesive backing, positioning the seal along your bed rail, and pressing it into place.
We recommend allowing 24 hours for the 3M adhesive to fully cure before exposing the seal to moisture or extreme temperatures. Total project time including surface prep is typically under 10 minutes.
MaxSeal is compatible with virtually all tonneau cover styles including hard folding, soft folding, roll-up, retractable, and one-piece covers. The seal works with all Extang tonneau covers and most competitor brands.
The low-profile bulb design sits at the tailgate contact point without interfering with cover closure or latch mechanisms. Many customers install MaxSeal specifically to enhance the weatherproofing performance of their existing tonneau cover by eliminating the tailgate gap.
MaxSeal features a universal design that fits most full-size pickup trucks including Ford F-150/F-250/F-350, Chevrolet Silverado 1500/2500/3500, Ram 1500/2500/3500, GMC Sierra, Toyota Tundra, and Nissan Titan. The seal also fits mid-size trucks like Toyota Tacoma, Chevrolet Colorado, GMC Canyon, Ford Ranger, and Nissan Frontier.
We offer custom-cut lengths to match your specific truck bed width. The seal installs on the bed rail contact surface where your tailgate closes, which has a consistent profile across most truck manufacturers.
We manufacture MaxSeal from EPDM rubber that maintains flexibility and sealing performance in temperatures ranging from -40°F to 248°F. The material resists UV degradation, won't crack in freezing conditions, and won't soften or lose shape in extreme heat.
Customers in both extreme cold climates like Canada and hot environments like Arizona report excellent long-term performance. The EPDM formulation is specifically engineered for automotive weatherstripping applications where temperature cycling and UV exposure are constant factors.
The 3M adhesive creates a strong permanent bond designed for long-term installation. While you can remove MaxSeal if necessary, the adhesive backing is single-use and cannot be reactivated.
If you need to remove the seal, use a plastic trim tool to gently lift it from the bed rail. Clean any remaining adhesive residue with isopropyl alcohol or adhesive remover. You would need to purchase a new seal for reinstallation, as the original adhesive backing won't provide adequate bonding strength after removal.
Yes, MaxSeal significantly reduces both road noise and wind whistle by eliminating the air gap between your tailgate and truck bed. This gap creates turbulence and vibration at highway speeds, which produces the characteristic whistling sound many truck owners experience.
Customers consistently report noticeably quieter highway driving after installing MaxSeal, especially when combined with a tonneau cover. The seal prevents the low-pressure zone behind your cab from drawing air through the tailgate gap, which is the primary source of wind noise in pickup trucks.
MaxSeal's 5/8-inch bulb diameter is engineered to compress when your tailgate closes without requiring additional force or affecting latch operation. The flexible EPDM rubber conforms to your tailgate's closing motion and springs back when opened.
The seal does not interfere with tailgate cables, assist mechanisms, or electronic latches. You should not notice any change in how your tailgate opens, closes, or locks. If you experience resistance, verify that the seal is positioned on the bed rail top surface and not overlapping onto areas that contact your tailgate latch mechanism.