Solubor Flow

10% Boron
Solubor Flow

The ease of liquid 

First and only aqueous suspension of sodium borate microcrystals

Liquid Borates for Fertigation

Solubor® Flow is a liquid suspension of sodium borate that readily disperses when added to water. During manufacturing, the sodium borate is placed in suspension without the use of chemical solvents. 

Application and benefits

Solubor Flow is a liquid form of borates perfectly mixed for foliar application, fertigation, or your hydroponic growing system. It has a chemical composition that allows for rapid dissolution in water, allowing for a pumpable means of delivering boron into agriculture processes. It is mainly used as a foliar spray on young plants, but it can also be soil applied when added to urea ammonium nitrate (UAN) solutions.

This product is compatible with most crop protection chemicals. Solubor Flow can be introduced by using the hydromixer (when the sprayer is equipped) or directly in the tank.

Since it is an aqueous formulation of boron, the product is non-viscous, non-oily, and solvent-free.


Solubor Flow is an aqueous suspension of sodium borate for spraying that appears as a brownish liquid. It should be dissolved in water if applied by spraying or mixed with nitrogen solution for direct application on the ground.

We recommend that the product be stored indoors at a temperature between 5°C and 35°C.  Although there is no crystal formation by sedimentation at low temperatures. If frozen, the product returns to liquid phase when the temperature rises. Always agitate prior to use.

Solubor Flow has a shelf life of eight months from production date.


Technical Details
  • Boron (B) 10%
  • Material required for 1 lb (.45 kg) of B 10.33 lb (4.69 kg)
  • 10 % B w/w 130g B/l
  • Derived from sodium borates and boric acid
  • Bulk density 1300 kg/m3
  • “Viscosity @ 24 Hours” mPas ≤6000
  • Solubor Flow is available 1300 kg polypropylene container (100 X 120 + 116cm)
Registration or notification is required for use in certain countries. Contact your regional sales representative for product availability.
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U.S. Borax, part of Rio Tinto, is a global leader in the supply and science of borates—naturally-occurring minerals containing boron and other elements. We are 1,000 people serving 650 customers with more than 1,800 delivery locations globally. We supply around 30% of the world’s need for refined borates from our world-class mine in Boron, California, about 100 miles northeast of Los Angeles. Learn more about Rio Tinto.

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