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Bangsulee & NaturalSealer

NaturalSealer NS-H

Description

Concrete is exposed to a various conditions and environments. The durability of concrete can be improved and the life of concrete is extended when its surface is properly treated. NaturalSealer NS-H is a Penetrating Hardener for the protection of concrete and the extension of concrete life.

NaturalSealer NS-H is water based penetrating hardener and its main material is soluble silica(lithium silicate). When applied on concrete, it penetrates into concrete, reacts with the excess calcium hydroxides of concrete and then forms additional C-S-H(calcium silicate hydrate) which is integrated with concrete. Because calcium hydroxides of concrete surface are already reacted with NaturalSealer NS-H, the treated concrete surface is chemically stable and becomes stronger against chemical corrosion by acids, pollutants and salts. Additional C-S-H increases the density of concrete surface layer and hardens it. NaturalSealer NS-H provides breathable and durable treatments for concrete.

Lithium silicate as a main material of NaturalSealer NS-H is one of soluble silicate in which a very small amount of lithium alkali effectively stabilizes silica in water. Lithium alkali is more reactive and smaller than sodium and potassium alkali. Its reaction is faster and more effective. Lithium alkali is not easily dissolved in water, so there is no efflorescence and alkali-aggregate reaction. Even if applied with excess, NaturalSealer NS-H does not form film on concrete and easily removed by vacuum.

Benefits

  • Enhanced compressive strength and abrasion-resistance
  • Protection against chemical penetration
  • Prevention of damage caused by neutralization
  • Prevention of damage caused by repeated freeze-thaw processes
  • Prevention of damage caused by chloride ion penetration
  • Protection of concrete and the extension of concrete life

Features

  • It is environmentally safe water based hardener for concrete. Its main material is special soluble silica (lithium silicate).
  • It effectively reacts with concrete, it is integrated in concrete and provides durable treatment.
  • There is no efflorescence and alkali-aggregate reaction because very small amount of lithium alkali is contained.
  • It does not coat the surface of concrete, so the treated concrete breathes as ever.
  • The appearance of the treated concrete is not changed.
  • Its penetrating depth depends on porosity of concrete.
  • The densification of concrete surface goes better as time passes.
  • It can be applied both new and old concrete.
  • Easy application

Uses

  • Protecting and hardening exposed concrete
  • Protecting and hardening for concrete floor of chemical plants, agricultural storage warehouse and processing factory, parking buildings, convention centers, shopping malls, etc.

Packaging

200ℓ/Drum
16ℓ/pail

Coverage Rate

The coverage rate 0.2ℓ/㎡ is recommended for new concrete with the compressive strength over 25 MPa. For old concrete with the compressive strength under 25 MPa, the coverage rate 0.3ℓ/㎡ is recommended. Coverage rate depends on the porosity of concrete. The appropriate coverage rate of treated concrete needs to be determined before application.

Application Recommendation

  • ① Cleaning the concrete surface
    The effect of NaturalSealer NS-H depends on its full and equal penetrating.
    It should not be applied to concrete surfaces that have been either coated or oiled. Such surfaces must be cleaned before it is applied.
    It may be applied to damp surfaces, it should not be applied on the surfaces which water is running over or have puddles of water on. Such surfaces must be dried before it is applied.
    It can treat both old and new concrete, but the newly poured concrete must be cured at least 28 days or more.
    the concrete surface to be treated need to be repaired and cleaned. Laitance also needs to be removed.
    Near windows and cars need to be protected before applying.
    ② Preparing hardener
    Prepare NaturalSealer NS-H.
    ③ working conditions
    Apply NaturalSealer NS-H under Surface temperature condition between 5℃ and 40℃. If the surface temperature is above or below the threshold, its treatment effect can not be guaranteed.
    Do not apply NaturalSealer NS-H in a very hot, freezing, rainy or high windy day.
    ④ Applying
    Apply NaturalSealer NS-H by means of low-velocity spray unit. In order to apply full and equal penetrating, adjust spraying velocity, angle and moving speed of nozzle. The effect of NaturalSealer NS-H depends on its full and equal penetrating.
    Do not apply excess hardener on concrete enough to make a puddle on the surface.
    ⑤ Curing
    Curing period is more than 3 days. The drying time is very shorter than curing time, typically within 2-3 hours. It takes enough time for curing and longer time is better.
    Keep water not to run over or not to make puddles on the treated concrete surface at least for one days.
    Spray water on the treated concrete surface 2-3 times a day for days water dry quickly at high temperature.
    ⑥ Compatibility with other coatings
    If necessary, paint or coating can be applied on the treated concrete surface with NaturalSealer NS-H. However, sufficient curing is needed before painting or coating.

Caution

  • NaturalSealer NS-H is only for concrete surface. Do not use for bricks or stones.
  • Because it is water based penetrating hardener, it can penetrate under the condition the concrete surface can absorb water.
  • It is a lithium silicate based hardener so it hurts glass and aluminum. Please, protect near windows and cars before application.
  • For the cracking bigger than 2㎜ or other structural failure, it is needed other treatment before the application.

Technical Data

  • Physical Properties
  • Appearance Transparent Liquid
    Odor None
    Main Component Soluble Silica(Lithium Silicate)
    Specific gravity 1.15±0.05
    pH 10.0~11.0
    VOCs None
    Freezing point 0℃ (32℉), Do not freeze.
    Storage 12 months at normal condition and closed container
  • Enhanced abrasion-resistance (KS F 2813)
    Under the abrasion condition H-22, 1000g, 500 cycles, the weight loss in the treated concrete is reduced to 46.46% compared with untreated concrete.
  • VOCs (ISO 11890-2)
    None

Safety

  • Read the Material Safety Data Sheet before handling and using.
  • Protect from freezing. It is a water based product.
  • Wear safety glasses and rubber gloves. It is alkali solution so it may stimulate skin and eyes.
  • It hurts glass and aluminum. Protect windows and near cars before applying.