Pyrogel vs Mineral Wool: Which to Choose?
Pyrogel (aerogel) is the thinnest insulation per millimetre; mineral wool is the cheap, proven workhorse. They suit different constraints — here is the trade-off.
Pyrogel is an aerogel blanket — the thinnest, most efficient industrial insulation per millimetre. Mineral wool (rock or glass) is the cheap, proven, high-temperature workhorse. They are not really rivals; they slot into different constraints.
The Core Trade-off
| Factor | Pyrogel (aerogel) | Mineral Wool (rock / glass) |
|---|---|---|
| Thermal conductivity | about 0.014–0.020 W/m·K | 0.035–0.045 W/m·K |
| Thickness for same R | roughly 1/3 to 1/2 | baseline |
| Max service temp | about 650°C (typical grade) | rock ~650°C / glass ~400°C |
| Cost | high (premium) | low |
| Handling | fragile, needs care | robust |
When Pyrogel Wins
- Tight pipe racks where 50 mm of mineral wool simply will not fit
- Retrofit on space-constrained equipment
- Cryogenic-to-moderate service where every millimetre of diameter matters
When Mineral Wool Wins
- Large surface areas (boilers, ducts, vessels) where aerogel cost is hard to justify
- High-temperature zones above aerogel's limit — step up to ceramic fiber blanket instead
- Budgets where lifecycle cost favours the cheap, robust option
Our Take
For most plant insulation, rock wool blanket delivers the best cost per R-value. Reach for aerogel only when space is the binding constraint, and for ceramic fiber when temperature is.
Frequently asked
Is Pyrogel better than mineral wool? +
For thinness and efficiency per mm, yes. For cost and general plant use, mineral wool wins. They suit different constraints, not a straight upgrade.
What temperature can Pyrogel withstand? +
Typical aerogel blanket grades serve up to about 650°C. Above that, use ceramic fiber (1000–1260°C) instead.
Why is aerogel insulation so expensive? +
Aerogel manufacturing is energy-intensive and low-volume; you pay for extreme thinness where space is the constraint.
Can mineral wool replace Pyrogel? +
On open surfaces, usually yes and far cheaper — just thicker. In tight pipe racks where space forbids the thickness, aerogel is the practical choice.