018-3163817 · 3/16 × 3/8 in · 50 ft
Black vinyl foam in our product listing. Narrower sealing gaps around an appropriate door, window or trim surface.
View exact product listingAP Products RV Foam Weatherstripping & Cap Tape Size Guide
Replacing flat foam sealing tape on an RV, camper door, window frame or truck cap? Getting the cross-section right matters as much as buying enough length. AP Products lists several similar-looking weatherstrips with different thicknesses, widths and roll lengths. Use this chart to narrow the part number before selecting the matching profile.
Measure the sealing gap before choosing tape
- Remove a short section of the original seal, if possible, to see its uncompressed shape and whether it has a Mylar-backed face, plain foam profile or another feature.
- Measure the sealing surface's usable width and the uncompressed seal thickness. A severely flattened old strip may not show its original dimensions accurately.
- Confirm how the material is held in place: adhesive backing, a channel or another designed retention method. Match the replacement's actual attachment method.
- Measure the total perimeter you need to seal and allow for corners and continuous runs. Choose the correct roll length without unnecessary joins.
AP Products cross-section and roll-length chart
The two measurements in the cross-section column are the manufacturer's listed profile dimensions, followed by the full roll length. They are not a vehicle-fitment claim.
| AP Products MPN | Listed cross-section | Roll length | Sealing material family |
|---|---|---|---|
| 018-3163817 | 3/16 × 3/8 in | 50 ft | Foam weatherstripping |
| 018-5163810 | 5/16 × 3/8 in | 10 ft | Foam weatherstripping |
| 018-5163450 | 5/16 × 3/4 in | 50 ft | Foam weatherstripping |
| 018-516150 | 5/16 × 1 in | 50 ft | Foam weatherstripping |
| 018-141125 | 1/4 × 1-1/2 in | 30 ft | Truck-cap tape |
Similar roll lengths do not indicate equivalent seals. For example, 018-3163817 and 018-5163450 both come in 50-ft lengths, but the manufacturer lists 3/16 × 3/8 in for the first and 5/16 × 3/4 in for the second. Check both dimensions before ordering.
Foam weatherstrip or Mylar-backed truck-cap tape?
Black foam weatherstrippingAP Products describes the 018-3163817, 018-5163810, 018-5163450 and 018-516150 profiles as foam weatherstripping for suitable doors, windows and other sealing gaps. Each has its own cross-section and roll size.
Grey Mylar-backed PVC foam018-141125 is a separate 30-ft cap-tape option measuring 1/4 × 1-1/2 in. AP Products identifies truck caps and other dust- and weather-sealing locations as intended applications.
A seal should compress as designed without preventing a hatch, window, truck cap or door from closing securely. Do not choose an unusually thick strip simply to fill an unknown leak: first check the original gasket, drainage path, mating surfaces and adjustment.
Quick answers
Is 018-5163810 just a short roll of 018-3163817? No. The listed profile sizes differ: 5/16 × 3/8 in versus 3/16 × 3/8 in.
Can I substitute 018-5163450 for 018-516150? Not by roll length alone. Both are 50-ft rolls with a 5/16-in first measurement, but their second measurements are 3/4 in and 1 in respectively.
Is the truck-cap tape the same as black foam weatherstripping? No. The Mylar-backed 018-141125 is a separate profile and material construction; match the part to the existing mounting and sealing surface.
Shop AP Products seals by exact manufacturer number
Each product below links to its own listing at NewRVParts. Confirm current availability and any adhesive-backing details shown on the specific product before installation.
018-5163810 · 5/16 × 3/8 in · 10 ft
Black vinyl-foam weatherstrip in our product listing. A thicker strip than 018-3163817 with the same nominal 3/8-in second dimension.
View exact product listing
018-5163450 · 5/16 × 3/4 in · 50 ft
Black weatherstripping. A wider 5/16-in-thickness option for a suitable door or window sealing surface.
View exact product listing
018-516150 · 5/16 × 1 in · 50 ft
Black foam weatherstripping. A 1-in-wide option when the mating surface requires more coverage.
View exact product listing
018-141125 · 1/4 × 1-1/2 in · 30 ft
Grey Mylar-backed PVC foam. Truck-cap-to-bed-rail and other matching sealing applications where the Mylar-backed profile is required.
View exact product listingÀ propos de NewRVParts
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