Welcome to our web pages.
We have been manufacturing and supplying silica gel sachets
and other desiccant products in the UK since 1983.
Registered to REACH
and ISO 9001:2015
we offer many variations from our standard range of stock items
to individually meet customers' moisture protection requirements.
What is silica gel ?
Silica gel adsorbs moisture from enclosed spaces to prevent damage caused by corrosion and mould growth.
It is an amorphous form of silicon dioxide, which is synthetically produced in the form of
hard irregular granules (having the appearance of crystals) or hard irregular beads. A micro-porous structure
of interlocking cavities gives a very high internal surface area (800 square meters per gram).
It is this structure that makes silica gel a high capacity desiccant.
Water molecules adhere to the gel's surface because it exhibits a lower vapour pressure than the surrounding air.
When an equilibrium of equal pressure is reached, no more adsorption occurs.
Thus the higher the humidity of the surrounding air, the greater the amount of water that is
adsorbed before equilibrium is reached. It is in these higher humidity conditions
(above 50% Relative Humidity) that stored or in-transit items are susceptible to damage.
The beauty of silica gel is the physical adsorption of water vapour into its internal pores.
There is no chemical reaction, no by products or side effects.
Even when saturated with water vapour, silica gel still has the appearance of a dry product, its shape unchanged.
Standard white silica gel is referred to as being non-indicating.
As it adsorbs moisture it remains physically unchanged.
Self-indicating silica gels have a moisture sensitive additive added to the basic silica gel.
This indicator changes colour as moisture is adsorbed thus giving a visual indication as to the activity level of the silica gel.