When looking for the best RV slide out weather stripping, you’re choosing between different profiles, materials, and mounting styles. The main difference lies in how these seals handle gaps and weather conditions. Some focus on easy installation with adhesive backings, while others provide heavy-duty protection with double-bulb designs and clip-on systems.
Best overall: AP Products 018-312-EKD, which features a user-friendly design with a straight edge for alignment and includes UV inhibitors for better durability against sun exposure. Best for large gaps: AP Products 018-316, as it offers an advanced base system with a generous wiper size to ensure a tight seal even when the slide out room creates a significant space. Best double bulb: RecPro Double Bulb Seal, because it uses nitrile rubber and a steel spring interior to maintain a firm, reliable grip while remaining flexible enough for straightforward installation.
This guide is for RV owners who need to replace worn-out seals to keep their living spaces dry and clean.
How We Picked
We compared 16 different Amazon listings to find options that offer clear specifications and reliable mounting methods. A product earned a place here only if it provided specific dimensions, material details, or clear installation instructions. We removed any products that lacked sufficient data regarding their size or intended application, ensuring that the selections focus on technical capability rather than marketing claims. We didn’t handle these items ourselves, relying entirely on the details provided by the manufacturers in their official product listings.
All 10 products side by side — scroll sideways to see every column.
| Top Pick | Best for Large Gaps | Best for Clip-On Grip | Best for Wiper Systems | Best for Doors | Best for Secondary Seals | Best for Windows | Best for EK Series | Best for D Seals | ||
| Preview |  |  |  |  |  |  |  |  |  |  |
|---|---|---|---|---|---|---|---|---|---|---|
| Product | AP Products 018-312-EKD | AP Products 018-316 | RecPro Double Bulb Seal | AP Products 018-350-EKD | AP Products 018-479 | AP Products 018-338-BLK | 018-478 Double Bulb Seal | AP Products 018-184-EKD | AP Products 018-1065-EKD | AP Products 018-2004 |
| Brand | Wankic | AP Products | RecPro | AP Products | AP Products | AP Products | MTZUL | AP Products | AP Products | AP Products |
| Best for | Best Overall | Best for Large Gaps | Best for Clip-On Grip | Best for Wiper Systems | Best for Doors | Best for Secondary Seals | Best for Windows | Best for EK Series | Best for D Seals | — |
| The listing says | Fits new or worn RV seals Contains UV inhibitors | EK Series slide out seal Fits new or worn RV seals | 2 1/8 inch high by 2 inch wide Nitrile rubber construction | EK Series slide out seal Fits new or worn RV seals | Double bulb with 2-1/4 inch wiper Includes slide-on clip | Black color Slide-in secondary seal | 2 inch x 2.25 inch x 28 feet Double bulb seal with wiper | AP Products EK seal with wiper EK Series slide out seal | D seal for EKD base 1 inch x 15/16 inch x 35' | Black color 1 inch width |
| More information | Price on Amazon | Price on Amazon | Price on Amazon | Price on Amazon | Price on Amazon | Price on Amazon | Price on Amazon | Price on Amazon | Price on Amazon | Price on Amazon |
1. RV Slide Out Seal 018-312-EKD Fits RV Camper Slideout System
Best for: General RV slide out maintenance and upgrades.
This seal is a versatile choice for those who need to replace old or worn rubber. It comes with a built-in wiper and uses an adhesive backing designed for easy alignment during installation. The 1-inch by 1-inch profile is a standard size that fits many common setups.
If your current seal is cracking or brittle, the UV inhibitors in this model provide a necessary upgrade for longer life. Use this product when you need a straightforward, single-profile solution that aligns easily with your slideout’s straight edge.
Don’t choose this seal if you’re trying to bridge heavy-duty, multi-bulb gaps or require a specialized heavy-weather barrier. Those gaps often demand a complex seal to prevent moisture intrusion. If you’re unsure, measure your existing gap; if it exceeds the 1-inch width of this product, the seal will fail to provide a complete, airtight barrier.
Pros
- Includes helpful UV inhibitors.
- Simple straight-edge alignment design.
- Suitable for new installations.
Cons
- Basic single-profile design.
- Limited to smaller gap sizes.
2. AP Products 018-316 Black Premium EK Seal Base with 2-7/8″
Best for: Covering larger gaps in slide out systems.
This seal is part of an advanced system that allows you to order components in two parts. Its standout feature is the 2-7/8 inch wiper, which provides extra coverage for wide openings.
The base uses a straight edge for mounting, and you can secure it with adhesive or fasteners. If your installation surface is uneven, use mechanical fasteners to ensure the base remains flush against the wall. If the surface is clean and smooth, the pre-applied adhesive backing is sufficient for a permanent bond.
While the AP Products 018-312-EKD is better for standard needs, this model is built for situations where a larger wiper is required to maintain a positive seal. It isn’t recommended for small, tight spaces where such a large wiper might bunch up. If you notice the wiper folding or catching during room retraction, the gap is likely too narrow for this specific profile.
You must purchase the D Seal separately to complete the system. Once the base is secured, the D Seal slides into the integrated track. This design hides your fasteners from view while creating a secondary barrier against the elements. You can also install this system on interior walls to prevent damage when the slide out room is fully extended.
Pros
- Very large wiper for coverage.
- Supports both adhesive and fasteners.
- Part of an advanced seal system.
Cons
- Requires two-part ordering.
- Large profile may not fit all.
3. RecPro RV Slide Out Seal 2″ Double Bulb Wiper Seal
Best for: Users needing a firm, clip-on grip.
This seal uses a double-bulb design made from nitrile rubber, which is known for being chemically resistant. An internal steel spring helps it stay in place.
It measures 2 1/8 inches high by 2 inches wide, with the wiper portion accounting for 1.6 inches of that height. Because it’s soft and flexible, you can install it easily along various edges or gaps. If your slide-out channel is designed for a flat, adhesive-backed strip, this clip-on model won’t fit. Only use this product if your channel is built to accept a mechanical clip-on attachment.
The double-bulb configuration excels at blocking water, dirt, and insects from entering your seams. It also acts as a cushion for moving parts while providing a clean, black aesthetic for visible gaps.
Pros
- Durable, chemically resistant nitrile rubber.
- Firm grip from internal steel spring.
- Easy to remove and replace.
Cons
- Clip-on style limits compatibility.
- Specific height might not fit all.
4. AP Products 018-350-EKD
Best for: Integrated wiper applications.
This is another option from the advanced EK series. It features a 1-inch width and 15/16-inch height, providing a compact footprint for slide out rooms.
Like other EK models, it uses a straight edge for alignment and is meant to be used with the EK system. It’s less suited for heavy-duty sealing compared to the AP Products 018-479, which provides a larger double-bulb design. If you have a standard setup that needs a reliable, integrated wiper without extra bulk, this is a solid choice.
Pros
- Compact and easy to align.
- Part of a proven series.
- Good for standard room seals.
Cons
- Not for large gap coverage.
- Requires compatible base system.
5. AP Products 018-479 Black Double Bulb Seal with Slide-On Clip
This double-bulb seal features a 2-1/4 inch wiper and an integrated slide-on clip. It’s designed for high-clearance areas, including baggage doors, cargo compartments, entrance doors, and slide-out rooms. You can also install it around windows to stop external elements from entering your living space.
Its primary function is to eliminate the infiltration of noise, dust, moisture, and vibration. Unlike adhesive-backed foam, this unit relies on a mechanical slide-on clip for mounting.
Check your door frame for an existing mounting channel before purchasing. If your frame lacks a track, you can’t use this product; it won’t adhere to flat surfaces. While it offers superior protection compared to thinner strips, its weight makes it unsuitable for lightweight or delicate trim.
Pros
- Versatile for various door types.
- Effective at blocking dust and moisture.
- Includes slide-on clip for secure mounting.
Cons
- Heavier than standard seals.
- Requires a specific mounting channel to install.
6. AP Products 018-338-BLK Slide-In Secondary Seal
This slide-in secondary seal measures 13/16-inch by 11/16-inch. Its compact dimensions make it the correct choice for tight spaces where you need an extra layer of protection.
Use this product if you have a narrow gap that requires a low-profile barrier. If you’re dealing with a wide or uneven opening, look for a double bulb seal instead. Relying on this product as a primary, heavy-duty weather barrier is a mistake that will likely lead to air or water leaks.
The 30-foot length provides enough material for most standard slide-out applications. Because it lacks the complex bulb structure found in other models, it’s best suited for secondary sealing needs rather than main entry points.
Installation is straightforward due to the slide-in design. Simply ensure your track is clean and free of debris before sliding the seal into place. This simple profile is ideal for those who prioritize a streamlined fit over heavy-duty cushioning.
7. 018-478 Double Bulb Seal
Best for: Long-run projects needing extra length.
This seal comes in a 28-foot length and offers a double-bulb design with a wiper. It’s effective at isolating cold air and noise while preventing dust from entering the RV. The 2-inch width and 2.25-inch height make it suitable for baggage doors, cargo doors, entrance doors, slide-out rooms, and windows.
Don’t assume this part is universal. If your current seal is the 018-479 model, this 018-478 unit won’t fit correctly. Always verify your specific model number before ordering to avoid a mismatch.
Installation requires removing the old base and thoroughly clearing away all dust and debris before applying the new strip. Failing to clean the surface prevents the adhesive from bonding, which often leads to premature peeling or moisture leaks. The listing for the 018-478 seal mentions a 2-year product service.
Pros
- Effective double-bulb sealing action.
- Good for noise and cold air.
- Detailed installation steps provided.
Cons
- Not a universal fit.
- Requires surface cleaning first.
8. AP Products 018-184-EKD White 1″ x 15/16″ x 35′ D-Seal
Best for matching white RV exteriors, the AP Products 018-184-EKD serves as the white variant of the premium EK slide-out seal system. It maintains the standard width and 15/16-inch height, ensuring full compatibility if you’re currently maintaining an existing EK series setup.
Choose this seal for new installations or when refreshing worn-out rubber components. The EK base includes an integrated wiper and a straight-edge design, which simplifies alignment during application. Its adhesive backing allows for a secure, professional fit.
While the white finish blends seamlessly with light-colored siding, remember that it shows road grime and debris more readily than the black 018-312-EKD model. If your RV spends significant time in dusty or muddy environments, you’ll need to clean these seals more frequently to maintain their appearance.
This product is strictly for those prioritizing a clean, white aesthetic. If your primary goal is hiding signs of wear or environmental buildup, opt for the darker alternative instead. Always verify your current seal dimensions before ordering to ensure the 35-foot length meets your specific slide-out requirements.
9. AP Products 018-1065-EKD D Seal
This D-seal is engineered precisely for the EKD base system. It measures the standard width by 15/16 inch and arrives in a 35-foot length. The gray finish is the primary advantage for owners looking to maintain a uniform aesthetic across their RV exterior.
If you’re replacing old, weathered trim, confirm your current base is the EKD style before purchasing. This seal slides into the track to provide a compression barrier against the elements. However, it lacks the integrated wiper found on the AP Products 018-312-EKD model.
Avoid this product if your application requires a secondary wiper to clear debris or moisture from a slide-out. If you prioritize a clean, flush appearance over added weather-sweeping capabilities, this is the correct choice. Using a seal without a wiper in a high-exposure area may lead to water intrusion during heavy rain. Always measure your existing channel width to ensure the profile provides the necessary compression for your specific gap.
10. AP Products 018-2004 Slide Out Modified EKD Seal
Best for: Modified slide out configurations.
This black seal features a modified EKD design measuring exactly the standard width by 1 inch high. It arrives in a 50-foot roll, a length specifically chosen for full-perimeter replacements or larger projects where splicing short segments creates potential leak points.
Use this profile when your slide out track demands a compact, uniform interface. It functions best in tight channels where a bulky seal would bind or tear during operation. If your slide out mechanism requires a high-profile double-bulb seal to bridge significant gaps, this basic design won’t provide sufficient compression.
Check your current track width before ordering. If your gap exceeds the width specified in the product description, this seal will fail to maintain a weather-tight barrier, leading to water intrusion. Always measure the existing seal’s height at its most compressed point.
How to Choose the Best RV Slide Out Weather Stripping
Verify Your Dimensions
The most important step is measuring the existing gap and the height of your current seal. If you choose a seal that’s too small, it won’t block out moisture or noise effectively. If it’s too large, it may cause friction or struggle to fit within your mounting channel. Always check the width and height provided in the listing against your RV’s specific needs. Skipping this measurement is the most common mistake, as these seals aren’t universal and vary significantly between brands and series. If you order the wrong size, you face a failed installation that leaves your seams vulnerable to water, insects, and dust.
Consider Mounting Style
Decide if you need an adhesive-backed seal or a clip-on style. Adhesive seals are generally easier for DIYers to align and apply to flat surfaces. Clip-on seals, however, provide a more secure, mechanical hold, which is often preferred for heavy-duty applications or areas with frequent vibration. If your slide out has a pre-existing metal track, you must verify if the seal you choose is designed to slide into that track. Never assume a seal will work with your current hardware if the mounting method doesn’t match. If you have a track, look for systems that allow you to replace the base and the seal separately.
Look for Material Benefits
Think about the environment where you use your RV. If you spend a lot of time in hot, sunny climates, look for seals with UV inhibitors to prevent the rubber from cracking and drying out prematurely. If you deal with heavy rain or dust, a double-bulb seal provides an extra layer of protection compared to a standard single-profile seal. Nitrile rubber is a superior choice if you need extra chemical resistance and temperature stability. While all these seals aim to keep your RV dry, the material properties determine how long the seal will last before it needs to be replaced again. Always confirm if your chosen seal is intended for slide-out rooms, baggage doors, or windows, as the specific application dictates the necessary durability.
Frequently Asked Questions
Can I install these seals by myself?
Most seals are designed for straightforward installation. For adhesive-backed seals, clean the surface thoroughly before application, while clip-on styles slide directly into the existing channel. Ensure the surface is free of residue to guarantee a proper bond or flush fit.
Are these seals universal for all RV brands?
No, these seals are not universal. Different manufacturers use unique track designs and specific height or width requirements. Always compare your RV’s existing seal profile and dimensions against the product specifications to ensure compatibility before purchasing.
How do I know when it’s time to replace my seals?
Inspect your seals for cracking, peeling, or loss of flexibility. If you notice water leaks, increased noise, or drafts, the seal has lost its effectiveness. Rubber naturally degrades from sun exposure, so replace it if the material no longer bounces back when pressed.
What is the difference between a single and double bulb seal?
A double bulb seal offers a secondary point of contact compared to a single bulb. This extra bulb creates a more robust barrier against water, dust, and insects. It is particularly effective for slide-out rooms facing harsh weather or those with uneven gaps.
Closing
For most users, the AP Products 018-312-EKD is the top choice due to its balance of ease of use and UV protection, while the AP Products 018-316 is the best option for those needing to cover larger gaps with a more substantial wiper. Before you finalize your order, double-check your current seal profile and the dimensions of your slide out channel.
Using the wrong mounting style is a common error that leads to poor performance, so confirm if you need an adhesive-backed strip or a clip-on version. If your current system uses a track, you may need a multi-component system where the base and seal are ordered separately. If you’re dealing with baggage doors or windows rather than a slide-out, look for seals designed for those specific gaps to stop vibration and moisture.
Once you have identified the correct type, ensure the length you purchase is sufficient for your entire slide out perimeter to avoid having to patch pieces together. If you’re unsure about the fit, verify the specific model number, as seals like the 018-478 and 018-479 aren’t universal. Always clean the installation position thoroughly to ensure the adhesive backing bonds correctly.
