SONAX XTREME Ceramic Plastic Sealant 750ml

Ceramic protection for exterior plastics — SONAX XTREME Ceramic Plastic Sealant

How do you protect faded plastic trim on your car for the long haul? The SONAX XTREME Ceramic Plastic Sealant uses Si-Carbon technology to lay down a satin-matte, hydrophobic layer on bumpers, trim strips and mirror caps — with up to three months of protection per application.

Neglected exterior plastic trim greys out fast: UV, ozone and the weather break down the surface polymers of the plastic and leave a rough, dull finish that grabs dirt and stops water from beading. A basic plastic dressing gives you a quick shine, but barely protects against fresh weathering. The SONAX XTREME Ceramic Plastic Sealant tackles this from a different angle: the Si-Carbon formula builds a chemically anchored, hydrophobic ceramic layer on the plastic surface — not a plain oil that washes off, but a bond that keeps UV protection and water repellency active for up to three months. In a 750 ml bottle for regular use across all kinds of vehicles.

• Si-Carbon ceramic protection for up to three months. The Si-Carbon technology in the formula bonds with the plastic surface on a molecular level and forms a longer-lasting layer than classic oil- or silicone-based dressings. The sealant stays active through several downpours and hand washes, so you don't have to reapply it after every wash. That saves time and money compared with plastic dressings you have to top up every week.
• Satin-matte look with no greasy overshine on exterior plastics. A lot of plastic dressings leave an oily high gloss that looks off on trim and bumpers that are meant to be matte. The Ceramic Plastic Sealant is tuned to the satin-matte factory tone of modern exterior plastics: the plastic looks fresh and cared for, without over-the-top shine. The result matches the factory-fresh look buyers know from the showroom.
• Hydrophobic surface that grabs less dirt. The sealed plastic surface repels water and cuts down on how much road grime, limescale and overspray stick to it. Slushy rain and road muck wipe off a sealed plane far more easily than off bare plastic. That keeps the car cleaner between washes and takes some of the work out of the next one.

Day-to-day from Detailing1: For the best results with the Ceramic Plastic Sealant, prep is everything: first strip the plastic of grease and silicone residue with a plastic cleaner, then degrease with isopropyl alcohol (IPA), and only then lay down the sealant. On badly faded plastic, a refresh step with the SONAX XTREME KunststoffGel "Außen" pays off before you seal — it brings back the original deep colour of the plastic before the sealant locks in and protects that state. Apply the Ceramic Plastic Sealant thinly with an applicator sponge, let it flash off briefly, then buff it off with a microfibre — don't rub it in, just spread it evenly.

Si-Carbon technology of the Ceramic Plastic Sealant — how it works and how it lasts

Si-Carbon technology is the heart of the Ceramic Plastic Sealant: silicon compounds (Si) combined with carbon molecules form a chemically anchored protective layer on the plastic surface once you've applied it. This bond is more stable than a plain oil film — oils only sit between the plastic and the outside world as a physical barrier that rain and washes strip off fairly quickly. The Si-Carbon layer, by contrast, ties into the surface molecules of the plastic and holds up against water rinses and cleaning agents far longer.

Alongside the hydrophobicity, UV protection is the second key job of the sealant. UV is the main driver of plastic greying: high-energy UV photons break apart the polymer chains at the plastic surface, which shows up as visible fading and brittleness. The Ceramic Plastic Sealant contains UV absorbers that catch part of the incoming UV and slow the greying rate. The effect stacks up: vehicles sealed regularly every three months show far less greying over the years than untreated ones.

The up-to-three-months protection applies under normal conditions: regular hand washes or automatic car washes, normal weather, no aggressive cleaners. In practice that means three to four applications a year, which makes the 750 ml bottle enough for most vehicles over a full care season.

A question that comes up a lot is whether the Si-Carbon sealant plays nicely with other ceramic products in a vehicle care system. Since the Ceramic Plastic Sealant only goes on plastic surfaces and never on paint, there's no interaction with paint sealants or ceramic coatings on the body. If you want to set the whole car up with ceramic protection — paint with a ceramic coating, plastics with the Ceramic sealant, glass with a hydrophobic treatment — you can run all of them together without any conflict. Each area has its own product, and you keep the line between plastic and paint clear when you apply.

Applying the Ceramic Plastic Sealant — prep, application and durability

How well the Ceramic Plastic Sealant works comes straight down to how you prep the surface. On greasy, silicone- or oil-loaded surfaces the Si-Carbon compound can't form a stable bond with the plastic — the sealant would only cling to the oil, not to the plastic itself. That's why pre-cleaning with isopropyl alcohol (IPA) or a dedicated plastic cleaner is a must, not an option.

Application: put the sealant on an applicator sponge or a soft microfibre and lay it down thinly on the cleaned plastic. Don't scrub, just spread it evenly. Depending on the ambient temperature, let it flash off for 2–5 minutes, then buff it off with a clean microfibre. On smooth plastics (mirror caps, sill covers) a single thin coat is enough; on textured, porous plastics (bumpers with a honeycomb structure) you can add a second coat after 10 minutes of drying to make sure the recesses are fully covered.

Temperature and weather shape the result: apply the Ceramic Plastic Sealant at temperatures between 5 °C and 30 °C. Below 5 °C the Si-Carbon compound reacts more slowly and takes longer to flash off — which can lead to uneven buffing. Above 30 °C or in direct sun the product dries on too fast and gets hard to remove. If you're working in summer, move into the shade or shift the job to the cooler morning or evening hours. In winter, a heated garage or wash bay is the way to go.

On the first application on new or long-neglected plastic, a two-coat approach pays off: the first coat soaks into the surface and fills the porous, UV-damaged structure. The second coat then forms the actual protective layer on an even base. Follow-up applications every three months usually only need one coat, since the base is already sealed.

Where it goes — bumpers, trim strips, mirror caps and more

The Ceramic Plastic Sealant suits all unpainted exterior plastic parts: bumper inserts and strips in their factory colour, sill covers, wheel-arch flares, mirror caps, A-pillar trims, plastic roof spoilers, door-handle recesses and rear diffusers. Vehicles with large plastic areas benefit most — SUVs, off-roaders and vans with pronounced plastic bumpers have a lot more surface that goes grey and neglected fast without regular care.

On bumpers with built-in parking sensors, work carefully: don't spray the product straight into the sensor openings. An applicator sponge guided only onto the plastic between the sensors keeps residue out of the openings. If you need to, mask the sensor openings with a small strip of painter's tape before you start.

Not meant for painted surfaces: the Ceramic Plastic Sealant is built specifically for unpainted, pigmented plastics and can leave streaks on clear coat. On rubber parts (door seals, window seals) and rubber lips on bumpers you can use the sealant too — it protects rubber against UV embrittlement as well, though it lasts a bit shorter than on hard plastic.

The Ceramic Plastic Sealant compared — plastic care products in the range

Within the SONAX plastic care range, the Ceramic Plastic Sealant sits as the long-term protection product for regular care. Compared with the SONAX XTREME KunststoffDetailer "Innen+Außen", the Ceramic sealant is built for pure exterior use and longer durability — the KunststoffDetailer is better for a quick interior and exterior refresh with instant shine, while the Ceramic sealant delivers the chemically bonded long-term effect.

For professional detailing businesses, the SONAX PROFILINE PlasticCare or the SONAX PROFILINE PlasticProtectant "Exterior" are the alternatives with higher concentration and pro-size packaging. The Ceramic Plastic Sealant is aimed at car owners and detailers who want to hit professional durability with a consumer product — without having to switch over to the PROFILINE system.

Buying the SONAX XTREME Ceramic Plastic Sealant — who it's for and when

The Ceramic Plastic Sealant is the right product for car owners who don't want to re-dress their exterior plastics after every wash, but value three months of quiet from plastic care work. It makes the most sense on vehicles that spend a lot of time outdoors and take heavy UV — the slowed greying of the plastic shows over the years.

For owners who like to look after their car entirely themselves, the Ceramic Plastic Sealant is a solid piece of the care routine: after washing and drying, first refresh the paint with a quick detailer or a spray sealant, then treat the plastic parts with the Ceramic sealant. The whole process takes 20–30 minutes on an average vehicle and gives you an all-round cared-for look — paint gleams, plastic is fresh and satin-matte. This two-product set covers every exterior surface without needing special pro gear or know-how.

The 750 ml bottle lasts one vehicle across several care cycles: each application on an average car uses 5–15 ml, depending on the size of the plastic areas. That makes the bottle a year's supply for one or two vehicles. Paired with the SONAX XTREME KunststoffGel "Außen" for the initial refresh of badly faded parts and the Ceramic sealant as follow-up protection, you get a complete two-product system for perfectly cared-for plastics all year round.