Proprietary EPDM dense rubber insert trim for RV, marine, and utility vehicle trim moldings. Snaps into 1/2" tracks and moldings to cover screw fasteners, protect trim channels from the elements, and deliver a clean finished appearance. A durable upgrade over original vinyl or plastic insert trim. Hand crafted and made in USA.
The Steele Rubber Products 90-3581-240 is a 1/8" high by 5/8" wide proprietary EPDM dense rubber insert trim designed to snap into the 1/2" tracks and moldings found on RVs, boats, and utility vehicles. Its primary functions are twofold: it covers the screw fasteners and mounting hardware inside the track channel, providing a clean finished appearance along body trim molding runs, and it protects the track from direct exposure to rain, road debris, UV, and physical impact — extending the life of the molding and the fasteners inside it.
The key distinction from original equipment insert trim is the material. Factory-installed insert trim is typically made from vinyl or plastic, which shrinks, hardens, fades, and becomes brittle from UV and ozone exposure over time — eventually cracking and falling out of the track in sections. The 90-3581-240 uses a proprietary EPDM dense rubber compound that resists shrinkage, cracking, and fading, maintains its flexibility and track-locking grip through years of outdoor use, and provides better defense against impacts and scuffs than a rigid plastic or vinyl insert. Installation requires no adhesives or tools — the profile simply snaps into the 1/2" track opening. A tucking tool can ease installation on longer runs. Available by the foot and in 15 ft and 30 ft pre-cut lengths. Also available in White.
Snaps directly into 1/2" track and molding openings — no adhesive, screws, or special tools required; secure mechanical retention once seated in the track
Covers screw fasteners and mounting hardware inside the track channel — a neat, professional finish on body trim molding, door frame molding, and window surround tracks
Dense rubber construction outperforms original vinyl or plastic insert trim — better protection against impacts, scuffs, UV, and the elements without hardening or cracking over time
Full 30 ft strip for complete replacement on long body trim molding runs or multiple shorter track segments. Hand crafted with 100% Satisfaction Guarantee
The 90-3581-240 is known to fit the following RV brands, but compatibility is not guaranteed. Always verify your specific model’s track opening dimensions before purchasing. This is not an exhaustive list — other models may also use this profile. Commonly Found On: • Winnebago • Forest River • Keystone • Cruiser RV • Coachmen Vehicle Types: • Travel Trailers • Fifth Wheels • Toy Haulers • Motorhomes • Marine (boats with 1/2" molding tracks) • Utility Vehicles with 1/2" body trim molding tracks Track Compatibility: This insert trim is designed specifically for 1/2" track openings. Before ordering, confirm that your trim molding or screw track has a 1/2" opening. Using this trim in a track with a significantly different opening width will result in a loose fit that allows the insert to pull out, or an opening too tight to accept the profile. Actual fit may vary based on individual models, production years, and manufacturing variations. Steele Rubber encourages customers to pre-fit parts before final installation.
Unlike adhesive-backed seals, insert trim is retained mechanically by the track opening. Correct fit depends entirely on matching the insert profile to the track opening width: • Measure the track opening: Confirm the track or molding slot measures 1/2" wide before ordering. This is the opening the insert snaps into — not the overall molding width • Remove the old insert first: If the existing insert is still in place, remove it and measure the exposed track opening to verify the 1/2" dimension • Pre-fit before cutting: Snap a short test section into the track before cutting the full strip to length. Steele Rubber encourages customers to pre-fit all parts before final installation • Use a tucking tool on long runs: A rubber tucking tool makes it significantly easier to seat the insert uniformly into the track on longer molding runs — especially on curved sections • Available in White: If your RV trim molding is white or light-colored, a White version of this insert trim is also available — confirm color match before ordering Black
Step-by-Step Installation: 1. Remove the Old Insert: Pull the existing vinyl or rubber insert out of the track channel. Start at one end and work progressively along the full run. On old, brittle inserts, the trim may come out in sections 2. Clean the Track: Remove any debris, old adhesive residue, or broken insert fragments from the track channel. A clean track ensures the new insert seats fully and consistently 3. Measure and Cut: Measure the track run length and cut the new insert trim to length using sharp scissors or a utility knife. Cut each section before attempting installation 4. Pre-Fit Test: Snap a short test section of the new insert into the track to confirm the 1/2" profile fits the track opening correctly before cutting and installing the full run 5. Snap Into Track: Starting at one end of the run, press the insert into the track opening and work along the full length, snapping the profile into the channel as you go. Apply firm, even thumb pressure 6. Use a Tucking Tool on Long Runs: A rubber tucking tool significantly eases installation on longer runs and curved sections, ensuring the insert seats fully and uniformly in the track without distorting the profile 7. Check Full Seating: Run your thumb or a blunt tool along the full length of the installed insert to confirm it is fully seated in the track with no lifted or partially inserted sections 8. Trim End Joints: At corners and end joints, trim the insert cleanly with a sharp knife for a neat finished appearance
In The Package: • One (1) continuous 30 ft strip of 90-3581-240 Proprietary EPDM Dense Rubber Insert Trim in Black Also Available In (Sold Separately): • Same profile, by the foot — for short track runs or pre-fit verification before purchasing a longer strip • Same profile, 15 Ft strip — for shorter molding runs or partial replacement jobs • Same profile in White — for RVs and boats with white or light-colored trim molding Recommended Tools (Not Included): • Sharp scissors or utility knife for cutting to length • Tape measure • Rubber tucking tool (recommended for long runs and curved sections — sold separately)
The 90-3581-240 serves two distinct purposes depending on the track type it is installed in: As Insert Trim (Body Molding Applications): In exterior body molding tracks, the insert trim snaps into the open channel of the molding profile, filling the visible slot and giving the molding a clean, finished appearance from the outside. This is the most common RV application — replacing the vinyl or plastic strip that runs along window surrounds, door frame molding, and exterior body trim rails. As Screw Track Cover (Fastener Concealment): In screw track applications, the same profile snaps over the track channel that houses screw fasteners used to mount trim panels, window frames, and other body components. It covers the screw heads and the track opening, protecting the hardware from corrosion and providing a finished look along the fastener line. In both applications, the dense rubber construction provides the same benefits: snap-in retention, element protection, impact resistance, and a service life that far exceeds the original vinyl or plastic inserts it replaces.
The material difference is the entire reason to replace original vinyl insert trim with the Steele Rubber EPDM version. Vinyl insert trim has a service life measured in years under normal outdoor RV use; EPDM maintains its properties significantly longer under the same conditions. On a new RV, replacing factory vinyl insert trim with the 90-3581-240 before problems develop is a straightforward preventive upgrade that eliminates a future maintenance item.