High-quality EPDM sponge rubber press-in window edge weatherstrip. Wedges between the glass and the retaining metal frame to provide a secure seal against extreme weather while eliminating noise and vibration. No adhesive, no tools required — simply press into the gap and the rubber seats itself. Known fitment: Thor Four Winds 5000 Class C motorhomes and 1995 Roadtrek 190 Versatile Class B campers. Also broadly found across Airstream, Forest River, Jayco, Keystone, Thor, Winnebago, and many other brands. Black, 20 ft pre-cut strip. Made in USA.
RV window edge weatherstrip occupies a specific and often overlooked position in the window assembly. It is not an exterior compression seal that closes against a door or hatch — it is a press-in glazing seal that fills the gap between the window glass pane and the aluminum or metal retaining frame that holds the glass in place. As this seal ages, hardens, shrinks, or deteriorates, the glass begins to move slightly within the frame — producing rattles, vibration noise, and wind intrusion at highway speed, and eventually allowing water to work its way into the frame channel and behind the wall surface.
The Steele Rubber Products 90-3719-257 is a 1/2" H x 1/4" W EPDM sponge rubber window edge weatherstrip — purpose-built for this application. The sponge rubber profile compresses slightly when pressed into the glass-to-frame gap and seats firmly, gripping both the glass edge and the metal frame channel to hold the glass securely. When the window is closed and the vehicle is in motion, the seated seal absorbs vibration and eliminates glass-to-frame contact — removing the rattle at its source rather than simply masking it.
Installation requires no adhesive, no tools, and no drilling. Identify the correct profile by measuring your existing seal's height and width, or pulling a section of the old seal free and comparing it to the 1/2" H x 1/4" W dimensions. Then cut the new strip to length and press it into the gap — the rubber does the rest. Steele Rubber notes this weatherstrip is often used in conjunction with a Sliding Window Edge Trim or Outer Window Weatherstrip for complete window seal replacement. Available in black (this item) and white to match your window frame color.
Wedges between glass pane and retaining metal frame — seats firmly without adhesive, holds glass securely, and seals the gap against weather penetration at the window edge
EPDM sponge rubber absorbs glass-to-frame vibration and eliminates window rattle at highway speed — addresses the root cause rather than masking the symptom
Press-in installation — no adhesive, no drilling, no special tools; simply cut to length and press into the glass-to-frame gap; the rubber profile seats and grips on its own
Will not shrink, crack, or fade — UV resistant for long-term outdoor performance; outlasts and outperforms standard vinyl window glazing strip
Window edge weatherstrip comes in multiple height and width profiles. Before ordering, confirm the dimensions of your existing seal match the 1/2" H x 1/4" W profile of this strip. The best way to identify the correct replacement is to: 1. Pull up one corner or end of your existing window edge seal to expose the profile 2. Measure the seal's height (how tall it stands in the channel) and width (how deep it seats into the gap) 3. Compare your measurements to this profile: 1/2" H x 1/4" W Note that some RV windows use more than one seal profile around the same window — check all sides before ordering. When in doubt, Steele Rubber Products offers a Window Edge Trim Sample Pack containing multiple profile sizes to help you identify the correct match before committing to a full-length purchase.
Primary Part Number: 90-3719-257 Known RV Fitment (not exhaustive): • Thor Four Winds 5000 — Class C motorhome, window edge • 1995 Roadtrek 190 Versatile — Class B camper van, window edge Also Broadly Found On: Airstream, Coachmen, Cruiser RV, East to West, Forest River, Grand Design, Heartland, Jayco, Keystone, Monaco, Prime Time, Roadtrek, Thor, Tiffin, Winnebago, and many other RV brands using aluminum frame windows with a 1/2" H x 1/4" W edge seal profile Available Lengths — Black (Same Profile): • 12 ft — same profile • 15 ft — same profile • 20 ft — Part 90-3719-257 (This Item) • 30 ft — same profile • Also available by the foot for custom lengths • Also available in White — same profile, white color Note: Compatibility is not guaranteed. Always measure your existing seal and confirm the 1/2" H x 1/4" W profile matches before ordering. This weatherstrip is often used in conjunction with a Sliding Window Edge Trim or Outer Window Weatherstrip for complete window seal replacement.
What You Need: No tools required. Recommended supplies: tape measure, scissors or utility knife, flat non-marring tool (optional, for pressing into tight channels). Basic Installation Steps: 1. Identify Your Profile: Pull up one end of your old window edge seal and measure its height and width — confirm it matches this profile (1/2" H x 1/4" W) before cutting new material 2. Remove Old Seal: Pull the existing window edge weatherstrip free from the glass-to-frame channel around the full window perimeter 3. Clean the Channel: Remove any old rubber fragments, debris, or residue from the frame channel — a clean channel ensures the new seal seats evenly 4. Measure & Cut: Measure the window perimeter and cut the new strip to length with scissors or a utility knife 5. Press Into Channel: Starting at one corner, press the new weatherstrip into the glass-to-frame gap, working around the perimeter — press firmly so the rubber seats fully in the channel 6. Check Seating: Confirm the strip is fully seated with no lifted sections or gaps — a properly seated strip sits flush and grips the glass and frame without adhesive
Included: • One (1) 90-3719-257 RV Window Edge Weatherstrip • 20-foot pre-cut strip • EPDM sponge rubber, 1/2" H x 1/4" W press-in profile • No adhesive — press-in installation NOT Included: • Tape measure, scissors or utility knife • Sliding Window Edge Trim or Outer Window Weatherstrip (sold separately — may be needed for complete window seal system replacement) Also Available: • Same profile in 12 ft, 15 ft, and 30 ft black pre-cut lengths • Same profile by the foot for custom lengths • Same profile in white
All lengths share the same 1/2" H x 1/4" W EPDM sponge rubber press-in window edge profile. Also available by the foot for exact-length orders, and in white for white-frame windows. Measure your window perimeters before ordering to determine the total length needed — multiple windows can be cut from a single strip.