Product Data Sheet Safety Data Sheet Show all documents

Sikagard®-705 L

Silane based reactive water repellent impregnation.

Sikagard®-705 L is a one-component low viscosity, solvent free liquid, reactive impregnation for concrete and cementitious substrates based on silane with 99 % active ingredient. Sikagard®-705 L complies with the highest requirements of EN 1504-2 for hydrophobic Impregnation (penetration depth class II & resistance to freeze and thaw salt stresses).

  • Excellent penetration
  • Fast uptake even on dense concrete
  • Economic and easy to use
  • Reduces capillary water absorption, protection against driving rain and splashing on vertical areas
  • Reduction of absorption of aggressive or deleterious agents dissolved in water (i.e. de-icing salts or chloride from marine environment)
  • No change in water vapour permeability
  • Long term efficiency, deep penetration
 
  • Increases the resistance of concrete to freeze and thaw cycles and de-icing salts
  • Reduce corrosion even in cracked concrete
  • Retard corrosion initiation by reducing the available humidity at reinforcement bars level
  • Mitigate corrosion by preventing further chloride to migrate to reinforcement bars
  • Comply with Dutch guidelines (RWS NEN-EN 1504-2) on CEM III
  • Resistant to sea water
  • Low VOC content
  • Ready to use
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Product Data Sheet Safety Data Sheet Show all documents

Usage

Sikagard®-705 L is used as water-repellent impregnation (hydrophobic treatment) for absorbent substrates such as concrete in civil engineering or building concrete structures subjected to heavy stress due to freeze and thaw cycles and de-icing salts and chloride attack in marine environment
  • Suitable for protection against ingress (Principle 1, method 1.1 of EN 1504-9),
  • Suitable for moisture control (Principle 2, method 2.1 of EN 1504-9)
  • Suitable for increasing the resistivity (Principle 8, method 8.1 of EN 1504-9)

Advantages

  • Excellent penetration
  • Fast uptake even on dense concrete
  • Economic and easy to use
  • Reduces capillary water absorption, protection against driving rain and splashing on vertical areas
  • Reduction of absorption of aggressive or deleterious agents dissolved in water (i.e. de-icing salts or chloride from marine environment)
  • No change in water vapour permeability
  • Long term efficiency, deep penetration
 
  • Increases the resistance of concrete to freeze and thaw cycles and de-icing salts
  • Reduce corrosion even in cracked concrete
  • Retard corrosion initiation by reducing the available humidity at reinforcement bars level
  • Mitigate corrosion by preventing further chloride to migrate to reinforcement bars
  • Comply with Dutch guidelines (RWS NEN-EN 1504-2) on CEM III
  • Resistant to sea water
  • Low VOC content
  • Ready to use

Packaging

18 kg pail

Colour

Colourless liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Conforms to the requirements of the EN 1504-2 class II – Polymer Institute report P 5634-E dated 5th April 2007
  • Hydrophobic impregnation according to EN 1504-2, DoP 02 03 03 01 001 0 000004 1105; certified by Factory Production Control Body: 0921; certificate 0921-CPD-2050 and provided with the CE-mark
 
Product Information

Chemical Base

Alkoxy silanes (99 % active ingredient)

Shelf Life

24 months from date of production if stored in unopened, undamaged and original sealed packaging.

Storage Conditions

Store in dry and cool conditions. Protect from moisture.

Density

~ 0.900 kg/l (at +25 °C)

Volatile organic compound (VOC) content

~327 g/l

(ASTM D 3960)

Viscosity

~9 mm²/s (at 25 °C)
System information

System Structure

2–3 coats.

Compatible with Sika® FerroGard® 903+ Corrosion Inhibitor
Technical Information

Resistance to Alkalinity

Complies

(EN 13580)

Freeze Thaw De-Icing Salt Resistance

Complies

(EN 13581)

Permeability to Water Vapour

40 × 103 s/m (Requirement of BRO 2002: < 200 × 103 s/m)

(EN ISO 12 572)

Penetration Depth

>10 mm

Class II

Capillary Absorption

Complies

(EN 13580)

Drying Rate Coefficient

Class I: > 30 %

(EN 13579)

Chloride Ion Diffusion Resistance

Control (CEM II/A-LL 42.5 N; W/C = 0.53)

13.1 × 10-12 m2/s

Treated with Sikagard®-705 L

1.2 × 10-12 m2/s

Control (CEM III/B 42.5 N; W/C = 0.45)

0.9 × 10-12 m2/s

Treated with Sikagard®-705 L

0.6 × 10-12 m2/s

Application

Application Information

Ambient Air Temperature

+5 °C min. / +35 °C max.

Dew Point

3 °C above dew point

Substrate Temperature

+5 °C min. / +40 °C max.

Substrate Moisture Content

< 5–6 % when measured with Tramex

Waiting Time / Overcoating

Can be overcoated with water and solvent based polymer paint - contact the proposed paint manufacturer for recommendations.
Sikagard®-705 L can be used as a water repellent primer under many Sikagard® protective coatings inclusive of water based dispersion. Penetration of water is thus prevented at possible weak spots or in the event of damage to the top coat. The risk of consequential damage such as paint flaking can be reduced.

Waiting time: Minimum 5 hours, maximum 1 week.

Curing Treatment

Sikagard®-705 L does not require any special curing but must be protected from rain for at least 4 hours at +20 °C.
Consumption

Consumption

Dependent on absorbency of the substrate as well as the required penetration depth: ~ 150 g/m2 per coat.
Application steps

MIXING

Sikagard®-705 L is supplied ready for use and must not be diluted.

APPLICATION

Sikagard®-705 L is applied using a low-pressure spray, brush or roller, in a single pass from bottom up taking care not to let the product run. Apply subsequent coats either “wet on wet” or when the surface is fully dry. On horizontal application, avoid ponding on the surface.

CLEANING OF TOOLS

Clean all tools and application equipment with Thinner C immediately after use. Hardened / cured material can only be mechanically removed.

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