Rubber band for a disc under the camera: types, installation and secrets of sealing

Installing a car camera is a task faced by almost every car owner who wants to improve their visibility or ensure safety on the road. But even the most expensive high-resolution camera is useless if its housing is not sealed. This is where it comes to the rescue rubber band for the disc under the camera - a small but critical element that protects electronics from moisture, dust and vibration. Without a properly selected seal, the camera will last for several months at most, especially in Russian road and weather conditions.

In this article, we’ll figure out what types of elastic bands for camera discs there are, what materials they are made from, how to choose the right size and shape, and also how to cut them. the secret of professional installers for sealing joints, which extends the service life of the camera by 2-3 times. We will pay special attention to typical installation errors - even experienced car owners make them, not suspecting that they are the cause of equipment failure.

Why do you need an elastic band for the disc under the camera: functions and risks of ignoring

Many car owners perceive the rubber seal as an optional part, saving on its purchase or using the first analogues they come across. However, its role is difficult to overestimate:

• 🌧️ Moisture protection — even microscopic drops of water, falling onto the camera board through a loose joint, cause corrosion of the contacts and short circuits. This is especially true for rear view cameras installed next to the bumper, where splashes from the wheels are inevitable.
• 🌀 Dust protection — dust and dirt, penetrating inside the case, settle on the lens and sensors, deteriorating the image quality. In advanced cases, this leads to overheating of electronic components.
• 🔧 Vibration absorption — the rubber dampens microvibrations that are transmitted from the car body to the camera. Without it, the mounts become loose and the optics lose focus.
• ⚡ Electrical safety — a hermetic seal prevents moisture from entering the power contacts, which is critical for cameras with a voltage of 12V.

Ignoring the sealant or using low-quality analogues leads to serious problems:

⚠️ Attention: Cameras without a rubber seal or with a damaged rubber seal fail in 80% of cases in the first year of operation. Owners of cars with frameless bumpers (for example, Renault Duster, Kia Rio), where vibrations are transmitted to the camera more strongly.

According to service centers, the most common breakdowns associated with lack of sealing are:

Type of failure	Reason	Average repair cost
Contact corrosion	Moisture penetration through a leaky joint	1 200–3 500 ₽
Lens fogging	Condensation inside the case due to temperature changes	800–2,000 ₽ (cleaning or replacing lenses)
Board failure	Short circuit from water	2,500–6,000 ₽ (module replacement)
Blurred image	Dust on the sensor or lens	500–1,500 ₽ (cleaning or replacement)

Types of rubber bands for discs for cameras: how not to make a mistake with the choice

Seals for cameras vary in material, shape and method of fastening. An error in choosing even one of these parameters can ruin all sealing efforts. Let's look at the main types:

1. According to the material of manufacture

• 🟢 Silicone - the most popular due to their elasticity and resistance to temperature changes (from -60°C to +200°C). Ideal for regions with cold climates. Disadvantage: high price (from 300 ₽ per set).
• 🔴 Rubber (EPDM) - a budget option (100–200 ₽), resistant to oils and ozone, but loses elasticity at temperatures below -30°C. Suitable for warm regions.
• 🟡 Polyurethane - durable and wear-resistant, but tough. Used for cameras with increased requirements for mechanical protection (for example, for SUVs).
• ⚪ Foam rubber - cheap (50–100 ₽), but short-lived. Suitable for temporary sealing only.

2. By shape and design

The shape of the seal depends on the type of camera mounting:

• 🌀 Round (O-ring) - for cameras with threaded fastening (for example, Parkmaster, BlackVue). The diameter is selected according to the size of the disk.
• 🟥 Rectangular - for cameras with a flat base (for example, Garmin, Nextbase). They often come complete with an adhesive base.
• 🔺 Profiled — with grooves for a tight fit to uneven surfaces (relevant for bumpers with stiffening ribs).

3. According to the method of fastening

The complexity of installation and the reliability of sealing depend on this:

• 🧲 Self-adhesive - easy to install, but require degreasing of the surface. Over time, the adhesive may peel off (especially if the bumper is washed frequently).
• 🔩 On latches - reliable, but suitable only for cameras with special slots (for example, Vantrue).
• 🔧 On screws - the most reliable option, but requires drilling holes in the bumper.

When choosing a seal, focus on:

1. Bumper material (plastic, metal) - silicone is suitable for plastic, polyurethane is better for metal.
2. Climatic conditions - for the North only silicone, for the southern regions EPDM is possible.
3. Camera type - for 360 degree cameras (for example, Thinkware Q800 Pro) seals with additional joint protection are needed.

How to choose the size of an elastic band: step-by-step instructions

Incorrectly selected seal size is one of the main causes of leaks. Even if the elastic band is of high quality, but smaller or larger than the required diameter, it will not provide a tight seal. Let's figure out how to avoid mistakes.

1. Measure the camera disk

You will need a caliper or ruler. Measure:

• 📏 External diameter disk (D) - if the seal is round.
• 📐 Length and width - if the seal is rectangular.
• 🔍 Thickness disc (H) - the height of the elastic depends on this.

Example: for camera BlackVue DR750S-2CH with a round disk with a diameter of 50 mm and a thickness of 3 mm, a seal with an internal diameter of 48–49 mm and a height of 3–4 mm is suitable.

2. Consider the gaps

The seal should shrink when installed by 10-15% of its original size. For example:

• If the diameter of the disc is 50 mm, the internal diameter of the rubber band should be 45–47 mm.
• If the length of the rectangular seal is 60 mm, the elastic should be 55–58 mm.

- Measured the diameter/length of the camera disk

- Took into account compression of the seal by 10–15%

- Checked the compatibility of the rubber band material with the bumper

- I bought a spare rubber band (in case of an error) -->

3. Check compatibility with the mount

Some cameras have non-standard mounts. For example:

• Garmin Mini 2 - requires a seal with a groove for the retainer.
• Viofo A129 Pro — you need an elastic band with a hole for the cable.

⚠️ Attention: If the camera threaded fastening (like Parkmaster), the seal must have an internal diameter 0.5–1 mm less than the thread diameter. Otherwise, the elastic band will twist when tightened.

Installing an elastic band on a disk under the camera: step-by-step master class

Even a high-quality seal will not save you from leaks if it is installed incorrectly. Let's look at the installation process for the two most common types of fasteners: round (threaded) and rectangular (adhesive).

1. Surface preparation

50% of success depends on this stage:

• 🧼 Clean the camera disk and the mounting location on the bumper from dirt, oil and old glue. Use isopropyl alcohol or white spirit.
• 🧴 Degrease the surface. Suitable for plastic antisilicone, for metal - acetone.
• 🔍 Check the disc for chips and burrs - they can damage the elastic band. If necessary, clean with sandpaper (grit 600–800).

2. Installation of round (O-ring) seals

Algorithm for cameras with threaded mount (for example, Parkmaster, BlackVue):

1. Place the rubber band on the camera disc, making sure it fits into the groove (if there is one).
2. Apply a thin layer to the gum silicone grease (for example, Liqui Moly Silicon-Fett) - this will make tightening easier and prevent twisting.
3. Insert the disc with the rubber band into the hole in the bumper and tighten the nut. Don't overtighten! The maximum tightening torque is 1.5–2 Nm (use a torque wrench).
4. Check the tightness: spray the joint with water from a spray bottle. If the drops do not penetrate inside, the installation is successful.

What happens if you overtighten the thread?

If over-tightened, the elastic becomes deformed, loses elasticity and ceases to perform its function. In addition, you can break the thread on the camera disk or bumper, which will require expensive repairs (up to 5,000 ₽).

3. Installation of rectangular seals

For cameras with a flat base (e.g. Garmin, Nextbase):

1. If the seal is self-adhesive, remove the protective film and glue it to the camera disk, aligning it with the mounting holes.
2. For seals without glue, use silicone based sealant (for example, Abro 11-AB). Apply a thin layer to both sides of the elastic.
3. Install the camera on the bumper and secure it with screws. Tighten in a cross pattern to avoid distortion.
4. Remove excess sealant plastic spatula until it dries (after 10–15 minutes).

For cameras with adhesive fastening (for example, Viofo A119):

• Apply glue (3M VHB or Tesa Powerstrips) on the seal, and not on the bumper - it’s easier to adjust the position.
• Press the camera with the rubber band against the bumper and hold for 30–60 seconds (time depends on the type of glue).
• Do not use the car for 24 hours - the glue will gain maximum strength.

Common installation mistakes and how to avoid them

Even experienced car owners make mistakes that ruin all sealing efforts. Here are the most common ones and ways to prevent them:

1. Wrong choice of material

Error: Using foam seals for bumper-mounted cameras.

Consequences: Foam rubber absorbs moisture and collapses in 2–3 months.

Solution: For outdoor cameras, use only silicone or EPDM.

2. Ignoring temperature gaps

Error: Installing a seal without taking into account the expansion of materials when heated.

Consequences: In summer, the elastic band may be squeezed out of the groove, and in winter, it may crack.

Solution: Leave a gap of 0.5–1 mm between the edge of the rubber band and the bumper.

3. Re-upholstery of fastenings

Error: Tightening nuts or screws to more than 2 Nm.

Consequences: Deformation of the seal and thread failure.

Solution: Use a torque wrench or finger-tighten as hard as you would when opening a tightly sealed can.

4. Neglect of sealant

Error: Installing a seal without additional sealing of the joints.

Consequences: Microcracks between the rubber band and the bumper allow moisture to pass through.

Solution: Apply a thin layer silicone sealant at the joints, even if the seal is self-adhesive.

5. Failure to comply with drying time

Error: Operating the car immediately after installing the camera on the glue.

Consequences: The seal moves, the tightness is broken.

Solution: Wait 24 hours before washing or riding in the rain for the first time.

Seal maintenance and replacement: when and how

The rubber band for the disk under the camera is a consumable item that requires periodic checking and replacement. Service life depends on operating conditions:

Operating conditions	Seal service life	Signs of wear
City (temperate climate)	2–3 years	Microcracks, loss of elasticity
Northern regions (frost below -30°C)	1–2 years	Rigidity, delamination of material
Southern regions (heat above +40°C)	1.5–2 years	Softening, stickiness of surface
SUV (constant vibration)	1–1.5 years	Deformation, displacement from the groove

Signs that the seal requires replacement:

• 💧 Moisture or condensation inside the camera body.
• 🖼️ Blurred or foggy image.
• 🔊 Extraneous noise (creaks) during vibration.
• 🔍 Visible cracks or tears in the elastic band.

Step-by-step seal replacement

1. Turn off the power to the camera (remove the fuse or disconnect the wire).
2. Carefully remove the camera without damaging the mounts. For glue models use glass removal thread or plastic scraper.
3. Remove the old seal and clean the disk of any remaining adhesive or sealant. For silicone use gasket remover (for example, Permatex Gasket Remover).
4. Install a new rubber band following the instructions in the "Installation" section.
5. Check the tightness: direct a stream of water from the hose to the mounting location. If after 10 minutes the inside of the chamber is dry, the installation is successful.

⚠️ Attention: If, when dismantling the camera, traces of corrosion are found on the contacts, do not limit yourself to replacing the rubber band. Be sure to clean the board from oxidation alcohol solution and apply protective varnish (for example, Contact CL-50).

Top 5 seals for cameras: rating 2026

There are hundreds of seal models on the market, but not all provide reliable sealing. We tested 15 options and selected the best in terms of price/quality ratio:

Model	Material	Dimensions (L×W×H), mm	Price, ₽	Features
SiliconSeal O-Ring Pro	Silicone	50×3×3	350	UV resistant, suitable for cameras BlackVue, Thinkware
EPDM Master	EPDM	60×4×2	180	Budget option for warm climates
PolyFlex Camera Seal	Polyurethane	45×5×4	420	For SUVs, withstands vibrations
3M Camera Gasket	Silicone + glue	55×3,5×2,5	500	Self-adhesive, compatible with Garmin, Nextbase
Viofo Original Seal	Silicone	48×3×3	280	Original seal for cameras Viofo

When choosing, focus on:

• 🔍 Compatible with camera brand - original seals (for example, for BlackVue) are more expensive, but guarantee 100% tightness.
• 🌡️ Climatic conditions — for Siberia only silicone, for the Krasnodar region EPDM is suitable.
• 💰 Budget — if the camera is budget (up to 5,000 ₽), there is no point in buying a seal that costs more than 300 ₽.

FAQ: Frequently asked questions about elastic bands for cameras

Can car sealant be used instead of rubber?

No. Sealant (eg Abro or DoneDeal) may temporarily close the cracks, but it does not absorb vibration and will crack over time. Rubber + sealant is the optimal combination.

What adhesive is best for self-adhesive seals?

Suitable for silicone rubber bands 3M VHB 4910 or Tesa Powerstrips. For EPDM - Loctite 406. Avoid superglue (eg. moment) - it destroys the structure of the gum.

What should I do if the seal has moved after installation?

Carefully pry up the rubber band with a plastic card and reinstall it, after first cleaning the surface of the old glue. If the seal is on the thread, add thread locker (for example, Loctite 243).

Is it possible to paint the seal the same color as the bumper?

Yes, but only acrylic paints (for example, Motip). Nitro-based paints destroy silicone. Before painting, degrease the gum and apply primer for plastic.

How to check leaks without water?

Use smoke test: Direct a stream of smoke (such as from an electronic cigarette) at the joint. If smoke gets inside, the seal is leaking. Alternative - compressor with soap solution (bubbles will indicate the location of the leak).