What is AQUASET II™?
AQUASET II™ is a versatile powdered solidifier — a semi rapid-setting material used to solidify aqueous liquids — for treating aqueous solutions with extremely high levels of dissolved solids, such as neutralized acids and bases.
It also treats organic liquids that are mixed with water and are water soluble or miscible (e.g. alcohols, benzenes, glycols, low-molecular weight ketones), and it is particularly useful in treating mixed wastes which contain both heavy metals and water-miscible organics (such as glycols).
AQUASET II™ is often used in conjunction with PETROSET® and PETROSET II™. Fluid Tech solidification agents are designed to stand alone or be used in combination with one another — while each product has its own specific attributes, there is literally no combination of wastes that cannot be solidified.
What waste types does AQUASET II™ treat?
AQUASET II™ is recommended for neutralized strong acids, neutralized weak acids, water-miscible organics, and silicone emulsions.
Typical loading rates, per the Fluid Tech Recommended Media and Loading Rate Guide (product added per gallon of waste):
- Neutralized strong acids: 4 – 5 lbs/gal
- Neutralized weak acids: 5 lbs/gal
- Water-miscible organics: 5 lbs/gal
- Silicone emulsions: 4 – 6 lbs/gal
- Evaporator concentrates (BWR & PWR): 4 lbs/gal
- Ethylene glycol solutions: 4 – 5 lbs/gal (0–35% EG) · 5 lbs/gal (35–60% EG) · 6 lbs/gal (60–90% EG)
The guide also lists blends — e.g. 50% AQUASET II™ with 50% PETROSET® for certain neutralized acids. Rates vary by waste stream; request a site-specific recommendation.
Technical specifications
| Product type | Powdered solidifier — semi rapid-setting material used to solidify aqueous liquids |
|---|---|
| Composition | Sepiolite (>50%); crystalline silica, quartz (10–15%) |
| Physical state | Powder |
| Color | Light tan to gray or reddish tan |
| Odor | Earthy odor |
| pH | 4 – 8 @ 25 °C |
| Solubility in water | Insoluble |
| Specific gravity | 1.9 – 2.4 |
| Flammability | Non-flammable and non-combustible |
| DOT transport | Not regulated |
Physical and chemical properties per AQUASET II™ SDS FTL-080-0002, Revision 05.
How does solidified waste hold up?
Wastes solidified with Fluid Tech products maintain their physical integrity through freeze-thaw conditions and the vibrational stresses encountered during transportation — ensuring no incidental or free-standing liquids develop prior to inspection at the final disposition or storage facility.
- Volumetric efficiency: volume increase of wastes treated using Fluid Tech products is typically less than 20% — minimizing container, transportation, and disposal costs and reducing generator liability.
- Leach resistance: Fluid Tech products irreversibly bind radioactive and hazardous constituents through naturally occurring ion-exchange mechanisms and form inert solids, stabilizing wastes both chemically and physically and keeping radioisotopes, heavy metals, and other hazardous constituents from leaching.
- Adaptability: designed to stand alone or be used in combination with other Fluid Tech products such as PETROSET® and PETROSET II™.
What about safety and handling?
AQUASET II™ carries the signal word "Danger": it contains crystalline silica (quartz), classified by IARC as Group 1 — carcinogenic to humans when inhaled. Do not breathe dust, and use only outdoors or in a well-ventilated area.
Keep containers tightly closed in a dry, cool, well-ventilated place, and do not allow water to contact the product until time of use to preserve product utility. Material can be slippery when wet. Review the full Safety Data Sheet before handling.
How do I get AQUASET II™?
AQUASET II™ is supplied by Fluid Tech LLC — contact our team at (423) 271-6505 or INFO@FLUIDTECHLLC.COM to scope your application.
Not sure which product fits your waste stream? Fluid Tech provides a Waste Form Questionnaire and a Recommended Media Matrix to match products to your application.
Frequently asked questions
What is AQUASET II™ used for?
AQUASET II™ is a versatile powdered solidifier used to treat aqueous solutions with extremely high levels of dissolved solids — such as neutralized acids and bases — and organic liquids that are mixed with water and are water soluble or miscible (e.g. alcohols, benzenes, glycols, low-molecular weight ketones).
Can AQUASET II™ treat mixed wastes?
Yes. AQUASET II™ is particularly useful in treating mixed wastes which contain both heavy metals and water-miscible organics (such as glycols). It is often used in conjunction with PETROSET® and PETROSET II™.
How much AQUASET II™ do I need per gallon of waste?
Per the Fluid Tech Recommended Media and Loading Rate Guide: 4 to 5 lbs/gal for neutralized strong acids, 5 lbs/gal for neutralized weak acids and for water-miscible organics, and 4 to 6 lbs/gal for silicone emulsions. Rates vary by waste stream — contact Fluid Tech at (423) 271-6505 for a recommendation.
Is AQUASET II™ hazardous to ship or dispose of?
AQUASET II™ is not regulated by DOT for transport, and if the product as supplied, and unmixed, becomes a waste, it will not meet the criteria of a hazardous waste as defined under the Resource Conservation and Recovery Act. The product does contain crystalline silica — follow the Safety Data Sheet and do not breathe dust.
Solidifying a difficult waste stream?
Tell us about your waste and our team will help scope the right product and loading rate.
Content reviewed August 2026 · AQUASET II™ SDS FTL-080-0002, Revision 05 (Nov 29, 2022) · fluidtechllc.com Solidification Agents page · Fluid Tech Recommended Media and Loading Rate Guide (© 2016).