SONAX XTREME Ceramic Plastic Sealant 750ml

Ceramic Protection for Exterior Plastics — SONAX XTREME Ceramic Plastic Sealer

How do you protect faded plastic parts on a car in the long term? The SONAX XTREME Ceramic Plastic Sealer uses Si-Carbon technology for a satin-matte, hydrophobic protective layer on bumpers, trim strips, and mirror caps — with up to three months of durability per application.

Unmaintained plastic parts on exterior bodywork quickly fade: UV radiation, ozone, and weather effects decompose the surface polymers of the plastic, leaving a rough, dull surface that attracts dirt and no longer repels water. Simple plastic care provides short-term shine but offers little protection against renewed weathering. The SONAX XTREME Ceramic Plastic Sealer solves this problem with a different approach: The Si-Carbon formulation forms a chemically anchored, hydrophobic ceramic layer on the plastic surface — not a pure oil that washes off, but a compound that actively provides UV protection and water repellency for up to three months. Available in a 750 ml format for regular use on all types of vehicles.

• Si-Carbon Ceramic Protection with up to Three Months of Durability. The Si-Carbon technology in the formulation bonds with the plastic surface at a molecular level, forming a more durable protective layer than classic oil or silicone care products. The sealer remains active even after several rainfalls and hand washes and does not need to be reapplied after every wash. This saves time and material costs compared to plastic care products that need weekly refreshing.
• Satin-Matte Appearance without Excessive Shine on Exterior Plastics. Many plastic care products create an oily high gloss that looks unnatural on trim strips and bumpers that are actually designed to be matte. The Ceramic Plastic Sealer is tailored to the satin-matte original tone of modern exterior plastics: The plastic appears fresh and well-maintained, without exaggerated shine. The result corresponds to the new car appearance standard that customers are familiar with when buying a vehicle.
• Hydrophobic Surface for Less Dirt Accumulation. The sealed plastic surface repels water, thereby reducing the adhesion of road dirt, limescale stains, and splash water residues. Mud rain and road dirt can be washed off a sealed plastic surface more easily than from unsealed plastic. This keeps the vehicle cleaner longer between washes and reduces cleaning effort for the next wash.

Practical Tip from Detailing1: For best results with the Ceramic Plastic Sealer, pretreatment is crucial: First, clean plastic parts of grease and silicone residues with a plastic cleaner, then degrease with isopropanol (IPA), and only then apply the sealer. For severely faded plastic, a refreshing step with the SONAX XTREME Plastic Gel "Exterior" is recommended before sealing. This restores the plastic's original dark color before the sealer fixes and protects its condition. Apply the Ceramic Plastic Sealer thinly with an application sponge, let it dry briefly, and then wipe off with a microfiber cloth — do not rub in, just distribute evenly.

Si-Carbon Technology of the Ceramic Plastic Sealer — Functionality and Long-Term Protection

The Si-Carbon technology is the core of the Ceramic Plastic Sealer: Silicon compounds (Si) in combination with carbon molecules form a chemically anchored protective layer on the plastic surface after application. This compound is more stable than a pure oil layer — oils merely form a physical barrier between plastic and environment, which is relatively quickly washed away by rain and washes. The Si-Carbon layer, on the other hand, bonds with the surface molecules of the plastic and resists water rinsing and cleaning agents significantly longer.

UV protection, in addition to hydrophobicity, is the second important function of the sealer. UV radiation is the main cause of plastic fading: high-energy UV photons break the polymer chain molecules on the plastic surface, leading to visible lightening and embrittlement of the plastic. The Ceramic Plastic Sealer contains UV absorbers that intercept some of the incoming UV radiation, thus slowing down the rate of fading. The effect is cumulative: vehicles that are regularly sealed every three months show significantly less fading progress over years than untreated vehicles.

The durability of up to three months applies under normal conditions: regular hand washes or automatic car washes, normal weather influences, no aggressive cleaning agents. In practice, this means three to four applications per year, which makes the 750 ml format sufficient for most vehicles for a complete care season.

A frequently asked question is whether the Si-Carbon sealer is compatible with other ceramic products in the vehicle care system. Since the Ceramic Plastic Sealer is applied exclusively to plastic surfaces and not to paint, there is no interaction with paint sealers or ceramic coatings on the bodywork. Anyone who wants to completely protect their vehicle with ceramic protection — paint with a ceramic coating, plastics with the ceramic sealer, windows with a hydrophobic agent — can combine all products without conflicts. Each area of application has its own product, and the boundaries between plastic and paint surfaces must be clearly respected during application.

Application of the Ceramic Plastic Sealer — Preparation, Application, and Durability

The effectiveness of the Ceramic Plastic Sealer depends directly on surface preparation. On greasy, silicone- or oil-containing surfaces, the Si-Carbon compound cannot form a stable bond with the plastic — the sealer would then only adhere to the oil, not to the plastic itself. Therefore, pre-cleaning with isopropanol (IPA) or a special plastic cleaner is mandatory, not optional.

Application: Apply the sealer to an application sponge or a soft microfiber cloth and apply thinly to the cleaned plastic surface. Do not rub, just distribute evenly. Depending on the ambient temperature, allow to dry for 2–5 minutes, then wipe off with a clean microfiber cloth. On smooth plastics (mirror caps, sills), a thin layer is sufficient; on textured, porous plastics (bumpers with honeycomb structure), a second layer can be applied after 10 minutes of drying time to ensure complete coverage of the indentations.

Temperature and weather affect the result: The Ceramic Plastic Sealer should be applied at temperatures between 5 °C and 30 °C. Below 5 °C, the Si-Carbon compound reacts more slowly and drying takes longer — which can lead to uneven removal. Above 30 °C or in direct sunlight, the product dries too quickly and becomes difficult to remove. If working in summer, move the application to the shade or schedule the work for the cooler morning or evening hours. In winter, application in a heated garage or wash bay is recommended.

For the first application on new or long-unmaintained plastic, a two-layer application is recommended: The first layer penetrates the surface and fills the porous, UV-damaged surface structure. The second layer then forms the actual protective layer on a uniform base. Subsequent applications every three months usually only require one layer, as the basic structure is already sealed.

Areas of Application — Bumpers, Trim Strips, Mirror Caps, and More

The Ceramic Plastic Sealer is suitable for all unpainted exterior plastic parts: bumper inserts and strips in original color, door sills, wheel arch extensions, mirror caps, A-pillar covers, plastic roof spoilers, door handle recesses, and rear diffusers. Vehicles with large plastic surfaces particularly benefit — SUVs, off-road vehicles, and vans with pronounced plastic bumpers have significantly more surface area that quickly appears gray and neglected without regular care.

Especially when used on vehicle bumpers with integrated parking sensors, careful work is required: The product should not be sprayed directly into the sensor openings. An application sponge, guided specifically only on the plastic surfaces between the sensors, prevents product residues in the sensor openings. If necessary, the sensor openings can be covered with a small strip of painter's tape before application.

Not intended for painted surfaces: The Ceramic Plastic Sealer is specially developed for unpainted, pigmented plastics and can leave streaks on clear coat. The sealer can also be used on rubber parts (door seals, window seals) and rubber lips on bumpers — it also protects rubber from UV embrittlement, albeit with a slightly shorter durability than on hard plastic.

Ceramic Plastic Sealer in Comparison — Plastic Care Products in the Range

In the SONAX plastic care range, the Ceramic Plastic Sealer is positioned as a long-term protection product for regular care. Compared to the SONAX XTREME Plastic Detailer "Interior+Exterior", the Ceramic Sealer is designed for pure exterior application and longer durability — the Plastic Detailer is better suited for quick interior and exterior refreshing with immediate shine, while the Ceramic Sealer provides chemically bonded long-term effect.

For professional detailing businesses, the SONAX PROFILINE PlasticCare or the SONAX PROFILINE PlasticProtectant "Exterior" are alternatives with higher concentration and professional container size. The Ceramic Plastic Sealer is aimed at vehicle owners and detailers who want to achieve professional durability with a consumer product — without having to switch to the PROFILINE system.

Buy SONAX XTREME Ceramic Plastic Sealer — for whom and when

The Ceramic Plastic Sealer is the right product for vehicle owners who don't want to re-care for their exterior plastics after every wash, but appreciate three months of peace from plastic care work. Regular application is particularly useful for vehicles that spend a lot of time outdoors and are exposed to intense UV radiation — the slowed fading of the plastic is visible over years.

For vehicle owners who like to completely care for their car themselves, the Ceramic Plastic Sealer is a useful component in their care routine: After washing and drying the vehicle, first refresh the painted surfaces with a quick detailer or a spray sealant, then treat the plastic parts with the Ceramic Sealer. The entire process takes 20–30 minutes for an average vehicle and provides an all-around well-maintained appearance — paint shines, plastic is fresh and satin-matte. This two-product set covers all exterior surfaces without requiring special professional equipment or knowledge.

The 750 ml format is sufficient for one vehicle over several care cycles: 5–15 ml are needed per application on an average passenger car, depending on the size of the plastic surfaces. The format is thus designed as a year's supply for one to two vehicles. In combination with the SONAX XTREME Plastic Gel "Exterior" for the initial refreshing of severely faded parts and the Ceramic Sealer as subsequent protection, a complete two-product system for perfectly maintained plastics throughout the year is obtained.