Premium Blue Indicating Silica Gel Desiccant (2 - 4mm Spherical Beads)
Silica Gel Direct's 100% blue bulk silica gel is a highly activated adsorbent engineered for demanding industrial, commercial, and technical applications. Featuring a strong natural affinity for moisture and high crush strength, this blue beaded desiccant provides reliable humidity control and dynamic gas/liquid drying. Impregnated with a cobalt chloride color indicator, the beads change dynamically from blue to pink as they become saturated, making monitoring effortless.
Key Benefits & Features
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Clear Saturation Indicator: Changes cleanly from blue to pink, giving you an immediate visual cue when the desiccant has reached capacity and needs replacement or reactivation.
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High-Capacity Moisture Adsorption: Has a high moisture capacity below 25°C at relative humidities above 40%, absorbing up to ≥28% of its weight in high-humidity environments.
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Non-Corrosive & Chemically Stable: Non-corrosive and chemically stable under standard operating conditions. Remains completely dry to the touch even when fully saturated, leaving no liquid residues or corrosive by-products.
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Versatile Chemical Adsorbent: In addition to water, silica gel effectively adsorbs HCl, gasoline-range hydrocarbons, CO₂, Cl₂, sulfur and nitrogen compounds, aromatics, and other organic vapors.
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High Crush Strength & Uniformity: Durable 2–4mm spherical beads (≥90% within size range) resist dusting and breaking down, maintaining optimal airflow in high-pressure systems.
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Heavy-Duty Packaging: Packed in a 4kg HDPE Bucket to ensure maximum product freshness during transit and storage.
Color Change Indicator Guide
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Active / Dry: Dark Blue
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Light Blue: >20% Relative Humidity
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Blue-Purple: >35% Relative Humidity
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Purple-Pink / Saturated: >50% Relative Humidity (Transition to Pink)
Common & Industrial Applications
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Gas & Liquid Dehydration: Natural gas dehydration, packaged gas and liquid dehydrators, high-pressure gas drying cartridges, and liquid petroleum gas (LPG) dryers.
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Scientific & Technical: Dynamic drying of refrigerants, organic liquid drying, chemical decomposition processes, and laboratory drying columns.
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Heavy Industry: Mining operations, construction moisture control, and transformer breather filters.
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General Storage: Visual humidity monitoring in sealed machinery cases, electrical enclosures, and bulk storage.
Product Specifications
| Specification | Details |
| Product Type |
Blue Indicating Spherical Silica Gel |
| Bead Diameter |
2.0 mm – 4.0 mm (≥95% qualified ratio) |
| Chemical Composition |
SiO₂ > 97%, Cobalt Chloride (CoCl₂) > 0.5% |
| Moisture Content |
< 5% (at 120°C) |
| Stack Density |
≥ 720 g/L |
| Physical Form |
Blue, translucent, high-crush-strength spherical beads |
| Standard Packaging |
4kg Net Weight in a Heavy-Duty HDPE Bucket |
| Shelf Life |
2 Years (Cool, dry location) |
3 Reviews Hide Reviews Show Reviews
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Perfect
Perfect size bead for our desiccant tubes and a great price
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Excellent drying agent for damp cupboards or basement corners
For a troublesome damp spot in a basement or cupboard, you need serious drying power. Heat simply won't work. Small packs of silica gel are a start but will not have the grunt for the job.
The 3 kilo pack has serious absorptive power. Put it in a metal baking dish, leave in the troublesome area, and it will soak up a litre or two of water before it turns pink. Then pop it into the oven, give it an hour at 150 C and the water is boiled out, leaving blue crystals, all ready for another cycle.
Seriously useful, at an economical price, promptly delivered! -
Blue stars
Fast delivery and very little dust in this delivery made it an easy mix with some white silica.
