Radcon Formula #7®

Does Radcon attract dirt or air borne pollutants onto treated concrete?

Radcon as a silicate material, creates no electrostatic attraction for airborne pollutants.The opposite can apply to sealer materials in particular siliconate based materials.

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Radcon Formula #7®
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Does Radcon promote fungal growth (mould) on treated concrete?

As Radcon is a high pH product (11.7) Radcon will prevent or deter fungal growth occurrence.
In damp shaded areas where fungus will eventually grow on Radcon treated concrete removal is extremely easy given the spores are unable to enter the concrete matrix.

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Radcon Formula #7®
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47

Can you use Radcon on an existing topping slab which leaks?

Obviously Radcon waterproofs all cementitious concretes including reinforced topping slabs.
Whilst Radcon will waterproof the actual topping, all too often water paths can remain under the topping transmitted by failed penetration detailing, wind driven rain external to the building, electrical conduits, parapet wall deck interfaces from the outer edge etc. etc.
Only treat topping slabs at your own risk, fully understanding the intrinsic problems which may be encountered post Radcon application due to other unknown problems existing under the topping.

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Radcon Formula #7®
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27

What would be a generic specification for the Radcon technology in tender documents?

The Material shall be a clear colourless, odourless, sodium silicate based material as globally supplied by Radcrete Pacific or their nominated global agents.
The material shall react at ambient temperatures with free lime present in the concrete forming non-water soluble complex calcium silicates which are chemically resistant compounds that fill the pores of the surface and sub-surface concrete including any leaking cracks present to produce a continuous sub-surface membrane with outgassing properties.

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Can Radcon be applied where other sealer materials have been used previously?

Obviously any material designed to repel water off concrete will also repel Radcon preventing penetration and ultimate waterproofing reaction from taking place.
Ensure all previous failed materials are completely removed. If cracks have been contaminated by previous materials they may require an arrow head grind, Radcon application and non-shrink grout emplacement.

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Radcon Formula #7®
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34

Do you have to do the second and third waterings?

After Radcon becomes touch dry the first watering is absolutely critical.
If the product is not watered within a few hours after becoming touch dry the system is lost and the Radcon material is no more useful than a silicate floor hardener.
The day 2 and 3 waterings can be conducted at any time in reality. The fact is it will usually take about 3 waterings over 3 days to achieve sufficient Radcon growth in cracks to achieve a 100% watertight result.
Once Radcon is touch dry you cannot water it too much.

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Radcon Formula #7®
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What is the shelf life of Radcon?

Even with half empty containers providing the lid is secure from air intrusion Radcon maintains unlimited shelf life.
Product should always be mixed prior to application.
Similar in fashion to a paint, the solids in Radcon particularly the heavy silicates settling out of solution will see solids settle in the base of the drums.
Proper mixing will see these solids re-dispersed through the Radcon solution.

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How should concrete be cured prior to Radcon application?

In all instances we prefer water curing practices which guarantees no form of concrete contamination.
If high quality curing agents are specified then obviously they will require water blast or grit blast removal for Radcon penetration during application to occur.

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Radcon Formula #7®
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How soon can Radcon be applied to concrete?

We suggest a 28 day primary hydration of concrete prior to Radcon Application.
However Radcon can applied within a few days after concrete pour.
If the 28 day period is reduced to a few days the applicator must be prepared to re-visit after 28 days plus to ensure no new major cracks have formed which may require re-application of Radcon to such cracks and further waterings to ensure a 100% watertight seal has been achieved to the entire area.

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Will Radcon change the appearance of concrete either after application or in the long term?

When Radcon has been applied to concrete, watered and allowed to dry, a trained eye will notice a slight increase in sheen given off by excess surface silicates.
Over the long term there will be no visual changes what so ever including any form of discolouration.

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