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Sikagard®-705 L

Sikagard®-705 L

Liquid passive corrosion inhibitor/hydrophobic impregnation for reinforced concrete 

Sikagard®-705 L is a one-component, low viscosity, solvent free, reactive passive corrosion inhibitor 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).

  • Fast uptake even on dense concrete.
  • Easy to use.
  • Transparent.
  • Excellent and deep penetration.
  • Reduces corrosion even in cracked concrete.
  • Mitigates corrosion rate of depassivated reinforcement bars.
  • Prevents chloride migration to reinforcement bars.
  • Effective against AAR.
  • Can be used on new and corroding, and old, structures.
  • Open to water vapour diffusion.
  • Increases electrical resistivity in concrete.
 
  • Increases the resistance of concrete to freeze and thaw cycles. 
  • Resistant to sea water.
  • Low VOC content.
  • Complies with Dutch guidelines (RWS NEN-EN 1504-2) on CEM III.
  • Reduces capillary water absorption, protects against mist 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).
  • Ready to use.
  • Long term durability.
  • Reduced green growth.
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Product Data Sheet Show all documents

Usage

Sikagard®-705 L is used as water-repellent passive corrosion inhibitor (with hydrophobic characteristics) for absorbent, non watercontacted concrete in civil engineering structures or buildings subjected to heavy exposure to freeze/thaw cycles, carbonation, de-icing salts or 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

  • Fast uptake even on dense concrete.
  • Easy to use.
  • Transparent.
  • Excellent and deep penetration.
  • Reduces corrosion even in cracked concrete.
  • Mitigates corrosion rate of depassivated reinforcement bars.
  • Prevents chloride migration to reinforcement bars.
  • Effective against AAR.
  • Can be used on new and corroding, and old, structures.
  • Open to water vapour diffusion.
  • Increases electrical resistivity in concrete.
 
  • Increases the resistance of concrete to freeze and thaw cycles. 
  • Resistant to sea water.
  • Low VOC content.
  • Complies with Dutch guidelines (RWS NEN-EN 1504-2) on CEM III.
  • Reduces capillary water absorption, protects against mist 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).
  • Ready to use.
  • Long term durability.
  • Reduced green growth.

Packaging

18 kg pail and 180 kg drum.

Colour

Water-like liquid, colourless.

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Conforms to the requirements of LPM: Suitability test to SIA 162/5, Report No. 1-21’699-6.
  • Conforms to the requirement of the “Bro 2002” Swedish National Road Administration (SNRA) publication No. VV2002:47 Report ref: F507580 B rev.
  • Evaluation of Conformity According to the Dutch RWS Directive (11-01-2011) and the European Standard EN 1504-2 – Sika MPL; Test Report No. 1203052 dated 09.04.2012.
  • Conforms to the requirements of the EN 1504-2 class II – Polymer Institute report P 5634-E dated 5th April 2007.
  • Active content - Polymer Institute Ref P5634-E dated 27th June 2008.
  • Prevention of chloride ingress - NT Build 515, CBI Sweden, date February 2017.
  • Department of Transportation of the State of California, Evaluation of silane penetrating sealer - NPE #14-09-005.
  • 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.
  • Report on corrosion testing - P 859/11-440-1, dated July 2011, ZAG, Slovenia.
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)

Viscosity

~9 mm²/s (at 25 °C)

Volatile organic compound (VOC) content

~327 g/l

(ASTM D 3960)
System information

System Structure

2–3 coats either as stand alone or combined with surface applied corrosion inhibitor and/or protective coating.
Technical Information

Penetration Depth

>10 mm

Class II

Capillary Absorption

Comply

(EN 13580)

Drying rate coefficient

Class I: > 30 %

(EN 13579)

Permeability to Water Vapour

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

(EN ISO 12 572)

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

Resistance to Alkalinity

Comply

(EN 13580)

Freeze Thaw De-Icing Salt Resistance

Comply

(EN 13581)

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 paints - 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, and the risk of consequential damages such as paint flaking can be reduced.

Waiting time: Minimum 5 hours, maximum 1 week.
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 applications, avoid ponding on the surface.

CLEANING OF TOOLS

Clean all tools and application equipment with Colma Cleaner or suitable solvent, immediately after use. Hardened / cured material can only be mechanically removed.

 

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