AEROSIL 90 / 130 / 150: Meeting the Demands of Modern Formulation

At the heart of our production line, AEROSIL 90, 130, and 150 stand as prime examples of untreated fumed silica, designed to solve some of the most common problems manufacturers face on their shop floor. Our team has built these grades for jobs that need performance and consistency. Every year, we see demand climb from industries that need stable rheology, efficient anti-caking, and formulary freedom. Over decades in the business, the real advantage these products bring comes out in high-throughput plants and specialty workshops alike, whether in paints, coatings, adhesives, or rubber compounding. Each grade represents a balance of particle size, surface area, and handling characteristics, crucial for the specific needs of daily manufacturing.

Understanding the Core of AEROSIL Fumed Silica

AEROSIL 90, 130, and 150 are synthetic amorphous silicas produced through flame hydrolysis of silicon tetrachloride. This process ensures purity and consistent quality batch to batch, a crucial factor for any facility where slight deviations can throw off an entire production run. Over years of managing full-scale manufacturing, the main challenges are flow control, sag resistance, and viscosity adjustment, especially in formulations that need stability under changing humidity and temperature. No other additive brings the balance of surface area and particle morphology these grades do, which means quality control teams spend less time troubleshooting and more time producing.

Comparing AEROSIL 90, 130, and 150: Not All Fumed Silicas Are Alike

Each model—90, 130, 150—offers a unique set of technical advantages. We developed AEROSIL 90 with a BET surface area near 90 m²/g, which suits bulk handling, storage, and general use in systems where moderate thickening or free-flowing powder is needed. Many powder coatings plants run this grade for its easy incorporation and predictable outcome. AEROSIL 130 takes the surface area up to approximately 130 m²/g. It starts to bring out more powerful thixotropy and reinforces gels and pastes in adhesives, liquid coatings, and silicone rubber. In our production runs, this translates into better control during mixing and longer shelf stability. For tasks that require sharper control, AEROSIL 150 provides the highest surface area in this lineup, around 150 m²/g. This makes it the mainstay for demanding systems that call for strong viscosity boosting at lower loadings.

All three grades share the core advantages of untreated silica: high purity, easily wetted in a wide range of solvents, and minimal impact on optical clarity in translucent and transparent formulations. Yet, the difference in surface area and particle structure changes not just performance but also how a batch reacts under scale-up. In our own lines and client feedback, we see fewer batch-to-batch surprises when matching the correct grade to intended performance—something no one enjoys troubleshooting after hours.

Practical Impact in Real Manufacturing Environments

Fumed silica grades often look interchangeable on paper, but handling tells another story. Our experience running large mixers and high-speed dispersers continually proves that AEROSIL 90 disperses fast and cleans up well, leaving little dust and minimal sticking on machine parts. Operators can move from powder to slurry to paste with few surprises. It works best where a slight boost in viscosity or anti-caking is the main hurdle, such as in detergents or free-flowing fillers. Powdered coatings shops often count on AEROSIL 90 for its consistent bulk density and ease of handling.

AEROSIL 130 shows its strengths inside epoxies, unsaturated polyester resins, and automotive primers. In the mixing tank, this grade pulls double duty. It increases sag resistance so blended formulations stick where intended but also lets processing stay smooth, reducing downtime at the mill or mixer. Tins, drums, or bags of raw materials face all sorts of conditions in storage racks, and we’ve seen AEROSIL 130 preventing clumping even after months in fluctuating warehouse climates, much to the relief of production schedulers.

AEROSIL 150 carves out its specialty in the most technical fields—silicone sealants, gels, and adhesives where low loading levels must still punch above their weight. We’ve supplied this grade to electronics potting operations that can’t afford runny mixes or slumping beads. Even small differences in rheology can lead to defects in high-value assemblies or medical devices, places where recalls are costly and reputation matters. Time and again, the higher surface area of AEROSIL 150 locks down movement, keeps ingredients evenly suspended, and gives the freedom to tune texture, from buttery soft to rigid, across very fine increments.

Supporting Coatings, Inks, and Composites: Value Beyond the Lab

Many believe that performance enhancements stop at the numbers on a spec sheet, but working with actual production teams proves otherwise. In industrial coatings, for example, AEROSIL 90 provides both flow control and anti-sag inside left-open cans left to settle for weeks. Customers report less need for aftermarket stabilizers or extensive remixing. Ink manufacturers use AEROSIL 130 to fine-tune printability, where dot sharpness and transfer rate rely on predictable viscosity. Our consistency helps print shops hit color targets without extra downtime adjusting formulations.

AEROSIL 150 steps in for advanced composites where resin flow and fiber wet-out both require balancing. Large wind blade manufacturers often need to hold resins in place during layup and cure, and this high surface area grade keeps fibers saturated without flowing out of the mold. If a resin-rich area forms due to slumping, finished products can lose life expectancy and mechanical strength—a risk reduced by using the right fumed silica. Customers point out savings on scrap and less rework when formulations are dialed in.

Challenges in Large-Scale Production and Solutions That Matter

Even the best additive can come with processing challenges. Bulk fumed silica, by nature, tends to be dusty and can agglomerate if handled poorly. We’ve seen firsthand how improper storage or handling leads to airborne particulates, which can create both health hazards and raw material loss. In response, we made investments in better packaging—multi-layer bags and specialty palletization—to cut down on dust exposure and shipping losses. Training our customers' operators on gentle transfer methods and staged addition means more product ends up where it’s needed and less time is spent on cleanup.

Dispersion is another area where practical experience outweighs theory. Too rapid an addition or insufficient shear leaves lumps or “fish-eyes” in the blend, especially in high-viscosity systems. Our in-house labs and technical support teams run hundreds of batch simulations every year, helping customers optimize their dispersion process. Adjusting sequence, mixing time, and equipment pays dividends by keeping cycle times tight and maximizing throughput. Many manufacturers now use specialty dispersion aids or pre-wet the silica to transform a challenging step into a predictable routine. Time saved here adds up over a year’s worth of batches.

Why Untreated Fumed Silica Remains a Foundation in Modern Formulation

Some new entrants to the industry look to treated silicas or advanced nanomaterials for solving everything from shelf-life to high-impact strength. Treated grades have their place, particularly in systems sensitive to moisture or where hydrophobicity matters above all. Yet, untreated fumed silica like AEROSIL 90, 130, and 150 continues to serve as the backbone of classic and modern formulations. There is no substitute for predictability in viscosity and flow, nor for the safety margin provided by well-known, unmodified additives. Decades of regulatory approval and customer data support the continued use of untreated AEROSIL in everything from basic paints to personal care items and food applications, provided the correct product is chosen for the end-use.

Introducing a new grade into an established process often means weeks of qualification and possible adjustment. With untreated grades, switching between surface areas allows for fast adaptation with less downstream impact, since chemical reactivity remains constant. This flexibility brings process engineers and R&D staff together, all working from a predictable base. Reliability is the keyword—it’s not just a matter of technical compliance, but a way of maintaining output day after day.

Environmental and Supply Chain Considerations

Stringent environmental requirements and evolving global supply chains pressure every chemical producer. Our plants operate under mandatory environmental controls, and we see increasing emphasis on reducing emissions and improving energy use. The flame hydrolysis route, which we have adapted over decades, remains one of the most efficient ways to build consistent amorphous silica with minimal by-product. Careful energy monitoring, raw material conservation, and waste gas recapture support regulatory approvals and align with our own sustainability goals.

In supply chains, a secure source of silicon tetrachloride and logistics resilience matter more than ever. Uninterrupted production means our clients don’t have to scramble for alternate suppliers when shortages hit. Our facility footprint and long-term contracts have seen us through raw material disruptions, natural disasters, and shipping slowdowns, always putting customer delivery first. This reliability cuts risk and costs for all involved, allowing for better forecasting and less need to keep emergency buffer stock.

Choosing the Right Grade for the Job

Customers often ask how to match a specific AEROSIL grade to an application. In hands-on work, the key factors are desired viscosity, ease of integration, and intended function in the system. Our experience finds that AEROSIL 90 supports bulk powders and light thickening in high-volume, low-viscosity formulations. Its easy flowability suits gravity-fed processing and storage in silos or drums. Where gel strength, sag resistance, and long-term stability matter, AEROSIL 130 moves to the front. It brings out the best in epoxy floors, roof coatings, and sealants, allowing controlled application without runoff or drips.

With AEROSIL 150, the focus shifts to specialty adhesives and elastomers that demand maximum viscosity at the lowest possible addition rate. This saves room for other functional additives, keeps shrinkage and curing behavior predictable, and prevents slumping in vertical or overhead joints. No two manufacturing lines are the same, but the feedback loop between our technical team and plant operators has made it clear that picking the appropriate grade saves both time and raw material over repeated batches.

Real-World Outcomes—Reducing Costs and Improving Results

Our aim has always been to help manufacturers run smoother and cut unnecessary expenses. For coatings lines, consistent product means pumps and pipes stay cleaner, filters clog less, and rework due to gelling or clumping drops drastically. In adhesives plants, downtimes for line cleaning or blocked mixers became rare after switching to the right AEROSIL grade. Many teams report significant reductions in additive consumption after finding the right balance, not just from theoretical calculations, but from iterative trials and batch reviews.

Beyond production cost savings, less waste means a better environmental profile. Containers empty more thoroughly, and dust emissions during bulk transfer drop, which matters both for operator comfort and for keeping within regulatory boundaries. With more predictable input, upstream and downstream processes run with fewer surprises, allowing for better allocation of labor and energy resources.

Ongoing Technical Support and Partnership

Product selection is seldom a one-off decision. Every year brings changes in raw materials, shifts in product targets, and new customer requirements. Our technical support doesn’t end at shipment; we work every day alongside plant technicians, lab staff, and R&D specialists to fine-tune raw material choice and process conditions. Site visits, joint lab trials, and on-call troubleshooting remain a regular part of our commitment to customers. Detailed application notes, batch histories, and open communication channels help address problems before they scale, keeping downtime low and morale high.

Some of our best process improvements have come from listening to end users who spot subtle differences batch to batch, or who invent new applications the original formulation could never have predicted. Our quality teams use this input to refine future batches. The result is a feedback-driven improvement loop, where each ton shipped carries knowledge learned from the previous ones.

The Future of Fumed Silica Production and Application

Looking ahead, the challenges facing materials science push even the best additives to evolve. New regulatory standards, end-use requirements, and sustainability targets force all manufacturers to rethink legacy processes. Yet, the core utility of untreated fumed silica remains secure for the foreseeable future. Its combination of safety, versatility, and technical margin means it continues to underpin everything from commodity-grade bulk powders to aerospace adhesives.

Investments in automation, smarter packaging, emission controls, and operator training will only increase. Our next-generation production lines already target improved particle uniformity, reduced dust, and more efficient conversion of feedstock to finished goods. Initiatives under way in our R&D centers aim at application-specific tailoring—helping customers take advantage of new markets and emerging processing methods, all without losing the reliability that keeps their own clients satisfied.

A Commitment to Reliability, Safety, and Performance

From the first bag or drum to ongoing supply contracts, our approach stays rooted in experience and practical problem-solving. AEROSIL 90, 130, and 150 each fill a distinct gap, built on the premise that manufacturing should work as smoothly as possible. The knowledge built up over decades goes into every batch produced, checked, and shipped. We work to ensure our partners, no matter the size, gain from the same quality that leaves our plant floor each day.

Users around the world rely on these grades to keep operations continuous, quality high, and troubleshooting to a minimum. As the industry landscape shifts, we see our mission as producing not just a technical product, but a real-world solution to the ongoing pressures of cost, efficiency, quality, and safety. Fumed silica may seem simple—just fine particles of silicon dioxide—but the right grade, used with experience and insight, brings more to modern manufacturing than any data sheet alone could ever promise.