What Is SiO2 in Ceramic Sprays and Why Does It Matter?
If you’ve ever shopped for a ceramic spray, you’ve seen “SiO2” slapped across the label. But what does it actually do—and how much do you really need?
In this post, we’ll break down what SiO2 is, how it works in detailing products, and how to avoid getting ripped off by low-quality sprays that use it as a buzzword.
🔬 What Is SiO2?
SiO2 stands for silicon dioxide—commonly known as silica. It’s a hard, durable compound found in quartz and sand. In detailing, it’s used to create a protective layer on your paint that resists water, UV rays, and minor contaminants.
When sprayed and bonded to your vehicle’s surface, it forms a thin, glass-like layer that enhances gloss, improves water beading, and adds chemical resistance.
📉 Not All SiO2 Is Created Equal
Many budget ceramic sprays will boast “SiO2” on the label—but what they don’t tell you is how much. Some products use less than 2%, which means the protection is barely noticeable and won’t last more than a few washes.
Others may use a poor-quality dispersion that doesn’t actually bond to your paint, making it more of a shine booster than a protective layer.
✅ What You Want in a SiO2 Ceramic Spray
- High SiO2 content (5%+ is solid, 10%+ is excellent)
- Durable water beading and UV resistance
- Actual bonding—not just a temporary film
- Safe for all surfaces: paint, trim, and glass
🧪 Real-World Results Matter More Than % Labels
The best ceramic sprays aren’t just about SiO2 content—they’re about how the formula is blended, how it behaves on the surface, and how long it lasts in real-world use.
That’s why it’s worth choosing a spray that’s been tested by real detailers and customers—not just slapped with a “ceramic” label.
Want a Ceramic Spray with Real SiO2 Protection?
Tough As Shell is a pro-grade ceramic spray with high SiO2 content, long-lasting durability, and killer gloss. It’s what we use on our own vehicles—because it works.
Buy on Jimbo’s Detailing Buy on Amazon🔁 How Often Should You Reapply?
With a quality ceramic spray, reapplication every 1–2 months is plenty for daily drivers. If you’re in harsh weather or wash often, reapply more frequently for best results.
FAQs – SiO2 and Ceramic Sprays
Is more SiO2 always better?
Not always. A well-balanced formula with 10% SiO2 can outperform a poorly made 20% product. Quality matters more than just raw content.
Can I use SiO2 sprays over wax?
You can, but it won’t bond well. It’s better to strip wax and apply to bare paint or a ceramic-friendly surface.
Will SiO2 sprays protect against scratches?
No ceramic spray prevents scratches—they help with water beading, UV, and chemical resistance, not abrasion.
