Frequently Asked Questions


Can it be used in powder form?

conGraph GND-20 is designed to be used in paste form, which means after being mixed with water. The technical characteristics of the product which guarantee its optimum performance have been determined according to this premise.

Can it contaminate the ground?

No.  conGraph GND-20 fully complies with the IEC 62561-7:2018 requirements, one of which is to remain chemically inert in the subsoil and not contaminate the environment.  The results of the leaching studies which guarantee these properties can be found in the product’s technical data sheet. Accordingly, conGraph GND-20 provides a stable environment in terms of its physical and chemical properties.

Is it a hazardous waste? How is it managed?

conGraph GND-20 is NOT a hazardous waste and is managed in the same way as conventional construction waste.

Does it need permanent moisture?

Definitely not. This is one of the principal differences between conGraph GND-20 and traditional solutions such as bentonite. By using conGraph GND-20, electronic conduction is attained, increasing the active part of the grounding electrode, and avoiding action on soil electrolytes.  Its effect is therefore permanent irrespective of the condition of the ground.

When can the grounding resistance value be measured?

The measurement must be taken no sooner than 24 hours following on-site application, but a period of 48 hours is recommended.

Can the product be pumped?

conGraph GND-20 has ideal rheological properties for the purposes of pumping.

Is drilling the ground necessary?

The product is designed for use in vertical electrodes or trenches. Depending on the hardness of the ground where it is to be applied, drilling may not be required and alternative solutions such as tubes can be used and which act as a mould for the product to assume their form.

Does it work the same with any type of electrode?

conGraph-GND 20 is compatible with copper and galvanised steel electrodes.  It is not compatible with aluminium. Please contact us with regards to any other metal types.

Does it protect the grounding electrodes?

conGraph GND-20 significantly reduces the corrosion that copper suffers underground and thereby increases the useful life of the installation. In a laboratory environment, it has been demonstrated to be up to 7 times less corrosive than bentonite, a factor which increases in aggressive soils.

How can the improvement in the grounding resistance value be calculated?

You can consult the expected grounding resistance values for vertical electrode, trench and/or combination installations by using the calculators available on the website.

In the event of it not being possible to bury a conductor, can it still be covered with product?

Yes, if there are no contraindications.

What are the product mixing requirements?

Just water in the proportions indicated on the bag or data sheet together with a suitable mixer and receptacle.

Can the product be bought in Big Bags?

conGraph GND-20 is normally supplied in 20 Kg. bag format, however, please contact us for alternative options.

What happens in the event of a lightning strike?

conGraph GND-20 samples have been tested for lightning strikes and the product maintained its integrity and performance.