The Ultimate Guide to Choosing Automotive Weatherstrips

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As a rubber manufacturer for the Auto, RV and Marine industries, we have technical terms we use to describe our products. This guide is to help beginners and pros alike to decipher the types of parts we offer and their application. In this post, we will explain:

• What is Weatherstripping
• How is Weatherstripping Applied
• What is the Difference Between Auto, RV and Marine Weatherstripping
• Basic Weatherstripping Terminology

What is Weatherstripping?

Defined, weatherstripping is a strip of rubber or other material used to seal the edges of a door or window against the cold; however, weatherstripping has a variety of applications and protects you from more than a chilly breeze.

Weatherstripping is an essential tool that guards your investment from mold, dust, dirt, grime, draft and pests, and keeps your air conditioning/heat inside.

The weatherstripping and rubber parts we produce here at Steele are manufactured from EPDM rubber. EPDM (Ethylene Propylene Diene Monomer) was developed in the s to meet the increasing demand for innovation in manufacturing. EPDM essentially mirrors the physical properties of natural rubber and adds the important function of UV resistance.

Due to its extreme weather, UV, and Ozone resistance, EPDM is the perfect weatherstripping compound to produce all of our parts out of. We also back all of our parts with a 100% satisfaction guarantee.

How is Weatherstripping Applied?

There are multiple ways to apply weatherstripping from glue-on, push-on and adhesive backed strips. Not every application will work for all projects so it&#;s important to consider your project&#;s unique needs before purchasing a weatherstrip.

What is the difference between Auto, RV and Marine Weatherstripping?

• Automotive seals are determined by the make, model & year of your car
• RV & Marine seals are mostly universal, as they have a variety of applications. However, select parts can have specific fitment based on year and make.

To expand a little more on those:

Automotive weatherstripping is determined by your car&#;s unique make, model and year. This is both convenient and inconvenient at times. How so? Depending on the type of car you have, you might not find what you&#;re looking for. This typically means that no one else has asked for that seal, or that there isn&#;t a high enough demand to produce those parts. If you&#;re looking for a kit, or all the seals for your particular make and model car, you can use a parts finder like the one of the Steele Rubber site. For example, say I&#;m looking for the seals for a Camaro Hardtop.

However, if you don&#;t see the parts you&#;re looking for, we recommend looking at our Universal line. If you&#;re doing a custom project like a hot rod or street rod, check out our Street Rod line! If we can&#;t produce what you need, we reach out to other companies in the industry to help you find what you&#;re looking for.

RV weatherstripping is vastly universal because RV manufacturers would often use what seals they had on hand. Which could result in two of the same year, make, and model RVs having different seals on them. Our RV parts are categorized by the seal&#;s location. For example, doors and compartments, A/C gasket, windows, and slide outs. Just because a seal is located in one category, doesn&#;t mean you can&#;t use it in another application.

In our marine line, you will find parts specific for boats like rub rails. As well as a variety of parts also included in our RV line. The main characteristic that distinguishes marine parts from the RV parts is that these seals are tested to withstand fresh and saltwater conditions.

Basic Weatherstripping Terminology

Gasket &#; A shaped piece or ring of rubber that fills the space between 2 or more surfaces, generally to prevent leaks. A gasket typically fills the space between the glass and metal channel of the RV.

Edge Trim &#; Designed to cover rough edges. Used around doors and other applications that require a cover for an edge.

Insert Trim &#; Insert trim rubber is the perfect replacement to the original vinyl seal. Most vinyl tends to crack and let water in the track which causes mildew. Our insert trim is manufactured from dense, 100% EPDM rubber, making it UV and weather resistant. It is designed to fit & lock in the metal track found on many RV and Toy Haulers.

T-Rubber &#; These seals can be used in just about any application where rubber is held in place with a track or channel. Many RV screen doors and shower doors utilize T-rubber seals.

Push-On &#; Push-on seals refer to how they are installed. These seals are designed to stop leaks, drafts, reduce noise and ensure a secure fit. These types of seals mostly consist of a rubber bulb attached to push-on type insert trim that has an integrated steel core. The result is a long lasting seal that is easy to install and requires no glue or adhesive to install.

Peel-N-Stick &#; Another type based on installation. These seals feature a 3M double-sided adhesive backing which offers quick and easy installation. Our Peel-N-Stick seals are superior to other parts with double-sided tape for a few reasons: We exclusively use 3M tape, we heat-apply the backing to our parts in-house during the manufacturing process, and because the heat-applying process permanently bonds the rubber seal and tape together.

Sponge Rubber &#; There are 2 types of sponge rubber, closed cell and open cell. EPDM rubber seals are typically closed cell sponge rubber. These seals are flexible, weather and UV resistant and can withstand pressure for long periods of time without losing their shape. Sponge rubber can be molded or extruded. Closed cell is ideal because it also does not absorb water like open cell designs. Our sponge rubber is closed cell. This is achieved by a salt-bath curing process.

Dense Rubber &#; Dense rubber can be extruded or molded and is cured using intense heat to achieve a solid structure. These seals feature greater resistance to impacts, abrasion and wear. This type of rubber is commonly found in window applications, and as a replacement for vinyl or plastic seals.

Extrusion &#; The extrusion process, as explained on our facility tours, is just like pushing Play-Doh through a toy mold. Dies (the shape we want the extrusion to be) are placed at the beginning of the extruder. Then, the proprietary EPDM rubber compound is forced through that die and &#;cured&#; to keep its shape. Dense rubber cures with dry heat, while sponge rubber extrusions are sent through a molten salt bath that makes the rubber expand into the squishy rubber we all know and love.

Mold &#; Our rubber molds are carefully crafted out of metal by computer controlled cutting machines to very exact dimensions. Each mold requires a specific amount of rubber to form each part. The rubber is either placed or mechanically injected under heated pressure into the mold and placed in a heat press to cure to take and hold shape.

Steele not only offers top-quality products, but top-quality knowledge to help you complete your projects, too. If you have questions regarding weatherstripping for your classic vehicle, street rod, RV, or boat, don&#;t hesitate to contact us! Call us at 800-447-, send us an , or chat with us on our website.

*For additional help check out our How To series on YouTube!

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By ZYXrubber

Car weather stripping, or those often-overlooked rubber seals around your doors, windows, trunk, and hood, play a vital role in keeping your car's interior comfortable and protected. It prevents water leaks, wind noise, and dust from entering the cabin and helps maintain a comfortable temperature inside the car. Over time, weather stripping can become worn out and damaged, leading to various problems.

Factors affecting the life of auto rubber weather stripping

Quality Variations: The quality of rubber used in weatherstripping makes a significant difference. Higher-quality materials will naturally last longer.

Sun Damage: Ultraviolet (UV) rays from the sun are the enemy of weatherstripping, weakening the rubber and making it more susceptible to tears and cracks.

Improper Car Storage: Leaving your car parked for extended periods in direct sunlight can accelerate sun damage. Consider using a car cover for parked vehicles.

Harsh Climate: Extreme weather conditions, such as freezing winters and scorching summers, can cause the rubber to crack and become brittle faster.

Harsh Car Wash Chemicals: Some car washes use aggressive chemicals that can degrade weatherstripping over time. It's advisable to opt for gentler cleaning products.

Types of Universal Automotive Weatherstripping

Those seemingly insignificant rubber seals around your car doors, windows, hood, and trunk &#; car weather stripping &#; play a vital role in keeping your driving experience comfortable and protected. These Automotive weatherstripping strips fill the gaps between various vehicle components, creating a barrier against the elements.

While the basic function remains the same, car weather stripping comes in various forms to suit different applications and vehicle types, such as Sedans, SUVs (Sport Utility Vehicles), Convertibles, Coupes, Minivans, off-road vehicles, Tractor, station wagon, pickup truck.

Automotive Rubber Door Seals Materials

When it comes to automotive door seals, rubber is the most commonly used weatherstripping type due to its excellent durability, weather resistance, sealing performance, and ozone resistance. However, within the realm of rubber itself, there are different types to consider:

EPDM Rubber (Ethylene Propylene Diene Monomer) : This is the most widely used material for car door seals. It offers exceptional weather resistance, ozone resistance, and flexibility at a reasonable cost.

Chloroprene Rubber (Neoprene):  Neoprene offers good weather resistance and flexibility, similar to EPDM. However, it may be slightly more expensive and have a stronger odor. Neoprene can be a good choice for applications requiring high oil and grease resistance.

Natural Rubber: This is the traditional material for car door seals but is less common nowadays.  While it offers good flexibility, natural rubber is less weather-resistant and can degrade faster than EPDM or neoprene.

Co-extruded rubber extrusions: For instance, the inner core might be EPDM for flexibility, while the outer layer could be a harder plastic for improved abrasion resistance.

Types of Car Weather Stripping and Their Locations:

Car Door Seals: Commonly U-shaped or L-shaped to fit around the door frame,  creating a tight seal between the door and the frame. They prevent wind noise, water leaks, and dust infiltration, and help maintain cabin temperature.

Car Window Seals: This creates a tight seal around the windows, reducing wind noise and preventing water leaks. There are different types for different window locations (vent window seals, beltline window sweeps, window channel seals, etc.). These may have a flange or lip to press against the window glass and channel water away. They prevent wind noise, water leaks, and dust infiltration.

If you are looking for more details, kindly visit I-ECO.

Sunroof seals: These are often complex, designed to flex and compress as the sunroof opens and closes. They prevent water leaks, dust infiltration, and wind noise.

Windshield Seal: This runs along the perimeter of the windshield, essential for sealing against the elements and for proper windshield wiper operation.

Trunk lid seals: Similar to door seals, they create a seal between the trunk lid and the car body, preventing water leaks, dust infiltration, and wind noise. 

Hood seals: These run along the hood perimeter to prevent water leaks, dust infiltration, and wind noise from entering the engine compartment.

Different car body styles (sedan, SUV, coupe, convertible, minivan) may require specific weather stripping designs to ensure proper fit and sealing.

Signs of Faulty Car Weather Stripping

Car weather stripping plays a vital role in keeping your car quiet, comfortable, and weatherproof. However, over time, it can wear out and cause problems. Here are some common signs that your car weather stripping needs attention:

Noise: 

While driving, did you notice excessive road noise or the whirring sound of wind? If so, there's likely an issue with the car's weather stripping.

Excessive road noise: This could indicate worn door seals or fender seals.

Wind noise: might be due to faulty window seals or sunroof seals.

Rattling: This often signifies worn window channel seals.

Whistling: This can be a symptom of defective window trim channel seals.

Water Leaks:

Do you notice wetness around the windows, doors, or the trunk? Leaking water is a clear sign of faulty weather stripping. Unattended water leaks can damage electrical components, promote rust, and create mold growth, posing health risks.

Temperature Issues:

If you feel uncomfortably hot or cold even with the AC on, it could be due to faulty weather stripping. Leaking air affects the climate control system's efficiency, putting additional strain on the AC and potentially impacting fuel economy.

Other Symptoms:

Visible cracks, holes, or a stiff and inflexible feel in the weather stripping all indicate wear and tear and the need for replacement.

how to replace car door weather stripping

Tools and Materials:

Replacement weather stripping specific to your car model (ensure proper fit)

Trim removal tool (optional, for prying out old stripping)

Utility knife or box cutter

Rubbing alcohol or cleaning wipes

Weather-strip adhesive (optional, some replacements come pre-applied)

Gloves (recommended for safety)

Car door rubber seals replacement process:

1, Remove the Defective auto weather stripping:

Carefully pry out the old weather stripping using your fingers, a trim removal tool, or a flathead screwdriver. Be gentle to avoid damaging the door panel or paint. Some stripping might be clipped in place, so look for these areas and detach them carefully.

2, Clean the Installation Area:

Thoroughly clean the area where the new one will be installed using rubbing alcohol or cleaning wipes. This removes dirt, grime, or adhesive residue for a good bond.

3, Sand the Metal Frame (Optional):

In some cases, lightly sanding the metal frame with fine-grit sandpaper can create a smoother, more adhesive-receptive surface for the new weather stripping.

4, Prepare the New Weather Stripping:

Seal adhesive acts as the double-sided tape that ensures a strong and lasting bond between the new weather stripping and the metal frame of your car door. If your replacement stripping doesn't have pre-applied adhesive, follow the manufacturer's instructions for applying weather-strip adhesive.

5, Install the New Weather Stripping:

Starting from one end, carefully press the new weather stripping into place, ensuring a snug fit along the entire door frame. Refer to your car's specific instructions for any particular positioning details. Close the door and check for any gaps or areas where it might not be sealing properly.

6, Let the Adhesive Cure (if applicable):

If you used weather-strip adhesive, consult the product instructions for curing time. Avoid opening and closing the door frequently during this period.

7, Add Protection (Optional):

While a silicone lubricant can offer some protection, consider using a weather-strip conditioner that is designed to preserve the rubber and prevent cracking over time.

To sum up

Car weather stripping is important in keeping your car quiet, comfortable, and protected from the elements.  Worn-out weather stripping can make creased noise, water leaks, and temperature control issues. If your weather stripping shows wear and tear, promptly replace it to ensure a comfortable driving experience. DIY replacement kits are available, or you can consult a professional for assistance.

At ZYXrubber, Weather Stripping Suppliers, we offer a comprehensive selection of car weather stripping to meet the diverse needs of your customers. Our stock includes a wide variety of:

Types: Car door rubber seals, window seal strips, sunroof seals, Hood and trunk seals, etc. To fit a wide range of car models.

Our team of weather-stripping experts is available to consult with retail and wholesale clients finding the perfect fit for any vehicle.  Contact us today to discuss your specific requirements. 

Want more information on Automotive Weatherstrips? Feel free to contact us.