018-088-BB — Black single-bulb clip-on seal
1 × 3/4-inch cross section, 28-ft length. Slide-on clip, not adhesive D-profile.
View sealAP Products RV Door & Window Bulb Seal Profiles and Parts Guide
Choose RV entry-door, window and cargo-compartment weatherstrip by the exact rubber profile rather than assuming every bulb seal will close the same gap. AP Products distinguishes single-bulb, double-bulb, J-bulb, D-seal and adhesive foam configurations. Compare the five clip-on door and window seals below by profile, dimensions and part number.
Manufacturer product-profile illustrations
AP Products' original hardware catalog illustrates seal cross sections and gives profile dimensions and package lengths in its “Seals for Doors, Windows and more” section. Open the illustrated AP Products catalog (PDF) or the manufacturer door/window seals category. The dimensions below follow the manufacturer's profile table. Compare the original seal cross-section before choosing a replacement.
Compare the seal cross-section and mounting dimensions with the door or window frame. Similar-looking bulb seals can fit different channels.
Compare exact seal profiles and published nominal dimensions
018-088-BB black or 018-742 white, 28-ft rolls. Choose by the original channel and profile, not colour alone.
018-1509 black, 28-ft roll. A narrower profile that may not seal an opening designed for a larger bulb.
018-181-BB black, 28-ft roll. Two bulb sections; not the same physical seal as one-bulb 018-088-BB.
018-1894 black, 28-ft roll. Asymmetric seal edge; compare the original cross section and door compression.
Compare replacement bulb seals
018-742 — White single-bulb clip-on seal
White single-bulb profile, nominal 1 × 3/4-inch, 28-ft length. Verify colour and channel fit.
View seal018-1509 — Black single-bulb narrow seal
3/4 × 7/16-inch single-bulb clip-on seal, 28-ft length. Smaller profile than 018-088-BB.
View seal018-181-BB — Black double-bulb clip-on seal
1-1/2 × 3/4-inch double-bulb slide-on clip, 28-ft length; not a single-bulb substitute.
View seal018-1894 — Black J-bulb clip-on seal
1 × 3/4-inch J-bulb, 28-ft length; asymmetrical profile differs from the ordinary single bulb.
View sealOther seals that should not be substituted automatically
AP 018-224 and 018-204 are nominal 1/2 × 3/8-inch adhesive D profiles; 018-318 is 3/4 × 1/2 inch. A stick-on D seal is different from a clip-on channel bulb.
Original part 250947 was superseded by 2020218613 (black EPDM, nominal 0.63 × 0.497 inch). Compare the original seal’s profile and mounting channel before considering an AP Products alternative; similar dimensions alone do not establish a fit.
AP 018-3014-96 and 018-3203 are identified as slide-out seal products, not confirmed replacements for the door/window parts above. Compare the slide-room installation and manufacturer specifications separately.
Measure the channel, not just the visible bulb
Identify how the original seal attaches: slide-on clip, adhesive backing, or another retainer. Measure the bulb width and height in its uncompressed state and the keeper/channel width. The catalog dimensions are nominal profile sizes, not an assurance that a seal will compress correctly in your door. If the original profile is deformed, compare an undamaged section or the manufacturer door drawing.
Measure the full door perimeter and required overlap before ordering; a quoted 28-ft roll length is not necessarily the quantity shipped in every resale package. Inspect the actual listing's package contents and the cut/roll supply terms.
For the factory entry-door D-seal and hinge components, see entry-door hinges and seal reference. For cargo-door lock mechanisms, see baggage-door latch reference.
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