What is Silica Gel and how does it work?

Silica Gel is a glass-like, porous structure of silicon dioxide (SiO2).  It adsorbs up to 30% of its own weight. And you read it correctly, that’s adsorb and not absorb. Silica Gel adsorbs moisture with the water molecules adhering to the surface of the Silica Gel granule.  Silica Gel is covered in millions of pores that retain this moisture.  Pore opening size ranges a magnitude up and down from a billionth of a metre (nanometre). The pores create a huge surface area, which will bind water through surface adsorption and capillary action.

Silica Gel packets provide an economical and effective way of protecting against moisture damage during transit and storage. The sachets are filled with non-indicating beaded silica gel desiccant, available in a variety of sizes.

Silica Gel can be used for protecting electronic equipment, cameras, tools, computers, musical instruments, preservation packaging, and all humidity-sensitive products.

Our Silica gel sachets come packaged in Aihua paper.  Despite the name, Aihua paper is not paper, it is actually a polymer; being made from Polypropylene (PP) and Polyethylene (PE). The material is lightweight & flexible, tear-resistant, relatively transparent, has a smooth surface and contains no harmful substances.

The Pro-Ex silica gel range is food grade.



Silica Gel desiccants are available in different qualities, which exhibit different absorption characteristics. In general, a particular Silica Gel will have a maximum adsorbance at a particular relative humidity. The adsorbance will fall off at either direction from this point.

Under optimal conditions Silica Gel will adsorb up to 30% of its own weight, but under practical conditions usually much less.

The adsorption ability falls at temperatures above 30-40°C.  Although some moisture can be adsorbed at temperatures up to 80°C, the risk of re-evaporation of already adsorbed moisture makes silica gel unsuitable for use in an environment where temperatures above 40°C may occur even temporarily.

NOTE: Silica Gel desiccants are NOT suitable as a shipping desiccant but can be used in packages where the risk of high temperatures is small.


Advantages of Silica Gel

  • non-toxic and non-flammable
  • odourless
  • adsorbs up to 30% of its weight in moisture.
  • if stored correctly can have an almost indefinite shelf life.
  • can be reactivated and reused if required.
  • non-corrosive.


Silica Gel Applications

  • Prevent mould – leather goods, photo albums, certificates, photo frames
  • Reduce spoilage and prolong shelf life – dried fruit, herbs, nuts and medication bottles
  • Prevent corrosion – camera equipment, tools

Additional information

Carton Weight7.9 kg
Carton Dimensions37 × 28 × 26 cm
Unit Weight


Unit Dimensions

2 cm x 4 cm

Sachet Material

Aihua paper

Select Options



Please find below all relevant Technical Product Sheets, Material Safety Data Sheets etc…

Guide to calculating Silica Gel needs
Silica Gel Calculator

6 reviews for 1g Silica Gel (7000pcs/ctn)

Powered by
Based on 6 reviews
5 star
4 star
3 star
2 star
1 star
1-5 of 6 reviews
  1. Great product

    • Hi Lesley,

      Thank you for taking the time to leave a review. Great news to hear that you are happy with your order.

      The Pro-Ex Team

  2. food grade, good for keeping food fresh

    • Hi Patrice,

      Thank you for the review, glad to hear our products are keeping your food fresh.

      The Pro-Ex Team

  3. Good Quality quick delivery

    • Hi Giuliana,

      Thank you for taking the time to leave a review, we’re happy to hear your order reached you quickly.

      The Pro-Ex Team

  4. Received on time, well packaged, very happy

    • Hi Natasha,

      Thank you for taking the time to review our product, we’re happy to be of service.

      The Pro-Ex Team

  5. great!

    • Hi Ash,

      Thank you for your feedback, we’re glad our products are to your liking.

      The Pro-Ex Team

Add a review

Your email address will not be published. Required fields are marked *


Best Seller Products