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Every car has one, and most drivers never think about it until it starts buzzing. A loose metal license plate frame rattles over bumps, and the vibration only gets worse with a subwoofer or a few years of road wear. Worse, metal frames trap moisture against the plate and scratch the paint every time the plate shifts. This Aujen silicone license plate review covers the fix a lot of drivers have switched to: flexible silicone frames for the front and rear plates that promise no rust, no rattle, and no paint damage.
The short answer: the Aujen silicone license plate frames (2-pack, model US518BL) are industrial-grade silicone holders sized for standard 12×6-inch US plates. The soft silicone absorbs vibration so the plate does not rattle, cannot rust, and will not scratch paint the way metal frames do. Installation uses an included plastic tool to stretch the frame over the plate, and the street-legal design leaves all plate details visible. The honest drawback: the soft material makes screws slightly harder to tighten than with a rigid frame, and mounting screws are not included. For drivers fighting plate rattle, it is the simplest fix available.
Table of Contents
Quick Pick: Aujen Silicone License Plate Frames
| Pick | Product | Key Spec / Best For | Check Price |
|---|---|---|---|
| Best Overall | Aujen Silicone License Plate Frames, 2 Pack | Industrial-grade silicone, rust-proof and rattle-proof, front + rear | |
| Best For Rattle | Aujen Silicone License Plate Frames, 2 Pack | Soft silicone absorbs vibration; snug fit stops the buzz metal frames make | |
| Best For Paint Protection | Aujen Silicone License Plate Frames, 2 Pack | Flexible buffer between plate and paint; no metal edges to scratch |
What the Aujen Frames Are
The Aujen set (model US518BL) includes two silicone license plate frames — one for the front plate, one for the rear — plus a small plastic installation tool. Each frame measures 12.6 by 6.3 inches, sized for standard US 12×6-inch plates, and weighs about 5.3 ounces. The material is industrial-grade silicone: flexible, weather-resistant, and soft enough to grip the plate without metal-on-metal contact.
The design details matter here. The frames have drainage holes so water does not pool behind the plate, reinforced corners at the stress points, and ventilation to reduce moisture buildup. The profile is deliberately slim so it does not cover any plate text, numbers, or registration stickers — the street-legal requirement that some decorative frames fail.
Silicone vs Metal vs Plastic: The Honest Comparison
Metal frames look sharp but cause the exact problems these solve: they rattle, they rust where the coating chips, and their hard edges scratch paint when the plate shifts in a car wash or over speed bumps. Plastic frames do not rust, but cheap ones turn brittle in sun and cold, crack at the screw holes, and still rattle because they are rigid.
Silicone sidesteps all three failure modes. It cannot rust because there is no metal. It does not rattle because the soft material damps vibration instead of transmitting it. It does not scratch because it is softer than the paint it touches. The trade-off is rigidity: a silicone frame will never feel as stiff as a metal one, and as noted below, that softness makes screw tightening slightly fussier.
A third-party analysis of Amazon’s best-selling plate frames rates the Aujen set 4.7 out of 5 stars across more than 30,000 reviews, with the no-rattle behavior and rust-proof build called out most often by buyers (source: reads.alibaba.com review analysis).
Installation: What to Expect
Installation is a two-minute job with one quirk. Seat the plate into two corners of the frame first, then use the included plastic spudger tool to work the remaining silicone edges over the plate. The fit is intentionally snug — reviewers note you need the tool precisely because the frame grips the plate tightly, which is also why it does not rattle afterward.
Two things to know before you start. First, mounting screws are not included; reuse the screws from your current frame or buy new ones. Second, several buyers report that tightening screws through the soft silicone takes a little more care than with a rigid frame — snug them down evenly rather than cranking one corner. Once seated, the frame stays put; the snug fit even conforms to plates that are slightly bent from minor fender benders, per a hands-on review (source: thetrackahead.com).
The Three Claims, Checked
Rattle-proof. This is the strongest claim and the best-supported one. Silicone absorbs the vibration that makes metal frames buzz against the plate and bodywork. It will not silence a plate that is hanging by one stripped screw — no frame can — but for the common case of a solidly mounted plate in a loose frame, the rattle goes away.
Rust-proof. Straightforward materials science: silicone contains no iron, so there is nothing to oxidize. It also keeps water off the plate’s back surface better than an open metal frame, which slows rust on the plate itself. In salty winter-road regions, that is a real benefit.
Paint protection. The frame acts as a soft buffer between the plate’s edges and the paint. Metal frames scratch when grit gets trapped and the plate shifts; silicone deforms around grit instead of grinding it in. It is not armor — a rock chip will still chip — but the everyday micro-scratches around the plate area stop accumulating.
Add it to your exterior maintenance checks: a quick look at the plate area during washes catches any trapped debris before it matters.
Who Should (and Shouldn’t) Buy Them
Buy them if: your current frame rattles; you see rust stains bleeding from the plate area; you have noticed scratches around the plate; you want a clean matte-black look without chrome.
Skip them if: you want a rigid show-car frame with a chrome or carbon look (silicone only comes in matte finishes); your state requires a specific dealer or specialty frame; your plate is a non-standard size outside 12×6 inches.
Frequently Asked Questions
Are Aujen silicone license plate frames street legal?
This Aujen silicone license plate review finds the design street-legal for standard use: the slim profile is made to leave all plate text, numbers, and stickers fully visible, which is the legal requirement in every US state. Tinted covers are a different product and are restricted in many states; these are open frames, not covers.
Do silicone license plate frames really stop rattling?
Yes, for the common case. The soft silicone damps the vibration that makes rigid metal frames buzz against the plate and bodywork. A 4.7-star average across 30,000+ reviews backs the rattle claim specifically. It cannot fix a plate mounted with stripped or missing screws.
Will the silicone frame fit my car?
If your car uses standard US 12×6-inch plates, yes. The frames measure 12.6 by 6.3 inches and are listed as universal fit for cars, SUVs, and vans. The snug fit even accommodates slightly bent plates.
Are mounting screws included?
No. The 2-pack includes the two frames and a plastic installation tool; you reuse your existing screws or buy new ones. Several buyers note the soft silicone needs even, careful tightening.
How do you install the Aujen silicone frame?
Seat the plate into two corners of the frame, then use the included spudger tool to stretch the remaining silicone edges over the plate. The tight fit is intentional. Then mount with your screws, tightening evenly.
Silicone vs metal license plate frame — which is better?
Silicone wins on rattle, rust, and paint protection; metal wins on rigidity and decorative finishes like chrome. For a daily driver, silicone is the more practical choice. For a show car where looks matter most, metal still has a place.
The Verdict
The Aujen silicone license plate frames do exactly what they promise: no rust, no rattle, no paint scratches, in a street-legal 2-pack for front and rear. The soft material asks for slightly more care during screw tightening, and you supply your own screws, but those are minor against the daily annoyance of a buzzing plate. It is a small, cheap upgrade that fixes a problem most drivers tolerate for years.
