reinforced and waterproofing concrete and crack repair inorganic material "RC-GUARDEX" - RC-021

Concrete waterproofing material, 1 Prevent oxidation, 2 High safety, 3 Easy Construction, 4 There is no odor or discoloratio - details see: https://www.buildingsupplieshub.com/reinforced-and-waterproofing-concrete-and-crack-repair-inorganic-material-rc-guardex-10100370
Type: Other Waterproofing MaterialsPlace of Origin: JapanBrand Name: RC-GUARDEXModel Number: RC-021
Main Raw Material: Sodium silicateUsage: ConcreteConcrete available: after cured, Old can alsoApplication Method: Spray
State: Liquid CoatingType of solvent: Aqueous inorganicfunction: waterproofDilution ratio: 6 times dilution
Possible construction area: 240 Sqm / PieceSqm unit price: 1 sqm / 3 ~ 5USD  
reinforced and waterproofing concrete and crack repair inorganic material "RC-GUARDEX"
contact supplier for reinforced and waterproofing concrete and crack repair inorganic material "RC-GUARDEX"


Earth friendly,Eco buildingmaterials basedon water
Ministry of Land, Infrastructure, Transport and Tourism
(NETIS: New technology Information System)
KT-060075-V
Registration as 2011 year highly recommended applicable technology
Civil engineering association: Conformity to draft guideline about construction method of protecting surface
Sodium silicate

Waterproof purpose

Material improving penetration of
inorganic concrete
Introduction about of NKS limited company’s concrete reforming material
Product’s features
Our product “concrete reforming material" is a product which not only has many functions such as “water-proof, stop water", “prevent salt, frost damage", “control carbonization" but also reduces cost, a new idea of “ silicate" product which' s excellent in workability and long term durability.
The product using abundantly Nano-sized Silicate – which was born from the newest Nano Technology (Refinement technology)- and is able to develop in a wide-spread operating environment according to basic principle [Penetrate the RC surface -> Refinement the gaps-> Solidification and Materialization]. This product can surely satisfy client and contractor's requests and possibly become a necessary product of RC body from now on.
We have received many orders of this product for authority's construction. Please feel free to ask us if you have any question about our experience of construction
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Effect to concrete
Waterproof effect

This product was registered in NETIS system as “2011 year Highly recommended applicable technology”.

Waterproof effect of our product such as replenishing gaps “Block waterway effect" (Refer picture 1) and response with cracks arising in body after construction “Self –repair function" (Refer picture 2). The basic operation principle of this product is that silicate- the principal component- is made to penetrate to deep parts in concrete. This component will react with many types of calcium in concrete, becoming a reacting product (Colloid shape), replenishing the gaps and waterway. This reacting product changes to solid body after 2~12 weeks, makes the body become a thick waterproof layer and remains this effect for a long period.

Our basic principle of our “concrete reforming material" product (Block waterway effect)Picture 1

According to low-pressure of water sprinkle, RC-Guardex will penetrate to inside parts of concrete.
*1 Inside parts of RC Guardex Calcium types inside
*2 The maximum penetrate depth of lateral side: about 30 ~ 100mm
*3 The maximum penetrate depth: about 190mm
*4 Hydraulic pressure of lateral side
Crack's occurrences
Response scope with inner crack is 0.2mm, surface crack: 0.8 mm
Penetration of rainwater
RC Guardex interacts with water and calcium types.
Prevent water's penetration
Interact RC Guardex will refine cracks in gel shape.
*5 Gel condition (Schematic diagram)
Solid body formation
The upper side of refining gel reacts with calcium ion dissolved in water, becomes a solid body to fill up the cracks. The reaction of small cracks in surface is the same.

Molecular model (network) of inorganic polymer
*6 Solidification (Schematic diagram)

Self – repair function of crack’s part

Self –repair functionPicture 2

RC Guardex fills up all cracks existing in concrete, automatically blocks water when the crack becomes bigger.

The upper side of refining gel reacts with calcium ion dissolved in water, becomes a solid body to
fill up the cracks. The reaction of small crack in surface is the same.
The reaction of small cracks in surface is the same.
When the refined parts are cracked again, the dried gel reacts with water, liquefies again (Orange parts) and penetrates to cracks.
The re-liquefied gel (material) reacts with free alkali in the surface of crack inside concrete, becomes gel again and prevents water's penetration.
The new gel which reacts with water will solidify. other gel which doesn't react with water will be refinement for other cracks.
Waterproof, Control carbonation, Alkali addition, Efflorescence prevention

When you apply RC GUARDEX (pH=11.2), it reacts with calcium in concrete. Because this process makes concrete refine, it restrains the penetration of degradation factor such as water and carbon dioxide.

Source: Civil Engineering conference (Surface protecting construction method's guideline (plan))

Na2SiO3•nH2O+Ca(OH)2+nH2O=>CaSiO•nH2O+2NaOH
(Sodium silicate)(Calcium hydroxide)(Water)(Crystal of C-S-H type)(Sodium hydroxide)
When reacting with calcium ion, Guardex generates the sodium hydroxide of strong Alkali, adds alkalinity to carbonized concrete.
The graph (left) shows data displaying the recovery of alkali in wall surface of highway's box culvert which is over 35 years from staring construction. In addition, we can get the same data of floor system's back side and pier. It can confirm the obtainment of recovery ability when exceeds RC GUARDEX's pH value.
Durability Improvement (Concrete's expansion, Adhesive strength enhance)

RC-GUARDEX reacts with Calcium ion in concrete, changes into inorganic polymer (network shape)
This inorganic polymer plays role of connecting cracks in concrete, enhances the flexibility of hard concrete and endurance with vibration and deflection. Because of this, the expansion of concrete is up to [120%] and the adhesive strength goes up to [120 ~ 150%]. As a result, the durability of decreasing the crack's occurrences is improved.

Concrete after being proceeded by RC GUARDEX has long chain structure of SI – crystal formation structure (High durability). Cubic structure makes bonding strength become strong. As the picture above, because the expansion ability in bending test is improved, the crack such as drying shrinkage is controlled. (Electric power development test data)Measure result of stretch capacity

Test adhesive strength (construction formula: n=3) 28 days

RC-GUARDEX2.28 N/mm2(Average value of sample)
Non-coated sample1.52 N/mm2(Average value of sample)
Effect, Features
  1. By filling capillary pore in inner part of concrete, this method is effective for waterproof not only inner part but also external part.
  2. Can waterproof with concrete in damp condition or at stagnant water places (Pit’ s types, water tank)
  3. Can construct cracks in outer wall such as tile wall PC board
  4. According to water supply amount, prevent abnormal expansion and early carbonization of low quality RC in new construction
  5. Control the arising occurrences of efflorescence.
  6. Fill up concrete’s porous parts, increase the primer’s effect.
  7. Use all parts consisting of cement
  8. Perform construction in wet places.
  9. The material’s safety is highly appreciated (Passed the technique standard of water system and of equipment’s material quality examination)
Packaging Detail:Standard safe packing or upon your request
Delivery Detail:15-35 days after the order confirmation

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