Dense proprietary EPDM rubber insert trim and screw track cover for RV, marine, and utility vehicle trim moldings. Snaps into 5/8" tracks and molding channels with no adhesive, no tools, and no glue — just press and snap in place. Made from a proprietary EPDM rubber compound instead of vinyl or plastic for better UV resistance, superior impact and scuff defense, and improved performance against the elements. Commonly found on Coachman, Cruiser RV, Forest River, Keystone, and Winnebago models. Also available in white. Black, 25 ft. Hand crafted, made in USA.
The Steele Rubber Products 90-3729-240 is a 7/8" H x 3/8" W dense rubber press-in insert trim that serves two functions simultaneously: it finishes the exposed face of a trim molding channel and covers the screw heads or fasteners used to secure the molding base to the RV exterior. The insert snaps firmly into standard 5/8" molding tracks with a press-and-snap installation that requires no adhesive, no glue, and no special tools — the rubber profile is dimensioned to grip the channel walls and hold securely once seated.
What distinguishes this trim insert from the vinyl and plastic alternatives commonly available is the material: Steele Rubber uses a proprietary EPDM rubber compound rather than standard vinyl. This matters in outdoor RV use because EPDM rubber significantly outperforms vinyl in UV and ozone resistance over the long term — vinyl trim inserts become brittle, crack, and shrink after prolonged sun exposure, particularly on the south and west faces of an RV exterior. EPDM rubber holds its flexibility and shape through extended UV and temperature cycling. The denser rubber construction also provides better defense against impacts and scuffs from road debris, campsite brush, and everyday handling than a rigid vinyl insert can offer.
The 90-3729-240 is designed for use as a standalone replacement insert in existing 5/8" molding tracks, and is also the correct insert for Steele Rubber's Track Molding Base (70-4668-247) — a peel-n-stick rubber molding base designed to accept this exact 7/8" insert trim profile. The 25-foot pre-cut length covers full-length exterior runs on most RV models in a single strip.
No adhesive, no glue, no special tools — press the insert into the 5/8" track channel and snap firmly into place; the rubber profile grips the channel walls and holds securely without additional fasteners
Made with a proprietary EPDM rubber compound instead of vinyl or plastic — better UV and ozone resistance, better defense against impacts and scuffs, and improved protection against the elements over the long term
Finishes the exposed face of trim molding channels while simultaneously covering fastener heads used to secure the molding base to the RV exterior — clean, finished appearance with no visible hardware
The correct insert trim for Steele Rubber's flexible Track Molding Base (70-4668-247), which uses a peel-n-stick adhesive base designed to accept this exact 7/8" insert profile — available together or separately
Track Size: This insert trim fits 5/8" tracks and molding channels. Verify the internal channel width of your existing molding track before ordering. Installing into a track wider or narrower than 5/8" will result in a loose fit or an insert that will not seat properly. RV Fitment: This insert trim is commonly found on Coachman, Cruiser RV, Forest River, Keystone, and Winnebago models, but compatibility is not guaranteed. This is not an exhaustive list — other RV makes and models may use the same 5/8" molding track. Always measure the channel width on your specific RV before purchasing. The actual fit may vary based on individual models, production years, and manufacturing variations. White Version Available: This item is Black (Part 90-3729-240 / 70-3979-240). A white version is available as Part 70-4689-240 for RVs with white or light-colored exterior trim.
Part Number: 90-3729-240 (also known as 70-3979-240) Available Pre-Cut Lengths (Same Profile): • 10 ft — Part 90-3724-240 • 15 ft — available in this profile family • 25 ft — Part 90-3729-240 (This Item) • 30 ft — Part 90-3495-240 • Also available by the foot for custom lengths White Version: Part 70-4689-240 — same profile, white color Compatible Molding Base: Track Molding Base 70-4668-247 (peel-n-stick rubber base designed to accept this exact 7/8" insert trim — available separately) Note: Always measure the 5/8" channel width of your existing molding track before ordering. Compatibility is not guaranteed — confirm the track dimensions match before purchasing.
Tools Required: None for basic snap-in installation. Scissors or utility knife for cutting to length. Installing Into an Existing Track: 1. Verify Track Width: Confirm the existing molding channel is a 5/8" track — the insert will not seat securely in wider or narrower channels 2. Remove Old Insert: Pull out the worn or damaged existing insert trim from the channel 3. Clean the Channel: Remove any old adhesive residue, dirt, or debris from inside the track channel 4. Cut to Length: Measure the run and cut the insert to the required length with scissors or a utility knife 5. Press and Snap: Starting at one end, press the insert into the channel and snap firmly along the full length — no adhesive needed; the rubber profile grips the channel walls Installing with Track Molding Base 70-4668-247: If using the Steele Rubber Track Molding Base (sold separately), first install the molding base to the surface using its peel-n-stick adhesive backing, then snap this 7/8" insert trim into the base channel per the above steps.
Included: • One (1) 90-3729-240 Press-In Insert Trim / Screw Track Cover • 25-foot pre-cut strip • Dense proprietary EPDM rubber, 7/8" H x 3/8" W profile • Black color NOT Included: • Track Molding Base 70-4668-247 (sold separately — required only for new installation without an existing track) • Scissors or utility knife for cutting to length
All length options share the same 7/8" H x 3/8" W dense proprietary EPDM rubber profile and 5/8" track fit. Select the length that best matches your project run to minimize waste.
All options are also available by the foot for custom lengths. The insert trim is also available in white (Part 70-4689-240) for RVs with white or light-colored exterior trim. This insert is the correct replacement trim for use with Steele Rubber's Track Molding Base (70-4668-247), available separately.