Product Data Sheet Show all documents
Sikadur®-41+

Sikadur®-41+

3-component thixotropic epoxy concrete repair and structural strengthening mortar

Sikadur®-41+ is a thixotropic, 3-part patching and repair mortar, based on a combination of epoxy resins and special fillers, designed for use at temperatures between +10 °C and +30 °C.

  • Easy to mix and apply.
  • Very low VOC (GEV Emicode EC1PLUS).
  • Very good adhesion to many construction materials.
  • Suitable for structural concrete repair, class R4 according to EN 1504-3:2005 (structural and non-structural repair).
  • Hardens without shrinkage.
  • Different coloured components for mixing control.
  • Thixotropic: non-sag in vertical and overhead applications.
  • High initial and final mechanical strength.
  • Good resistance to abrasion.
  • Good resistance to chemicals.
  • Application up to 60 mm thickness in one layer.
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Product Data Sheet Show all documents

Usage

The product is used for:
  • Structural concrete repair (Principle 3, Method 3.1 of EN 1504-9). Repair of spalling and damaged concrete in buildings, bridges, infrastructure and superstructure works.
  • Structural strengthening (Principle 4, Method 4.4 of EN 1504-9). Increasing the bearing capacity of the concrete structure by adding mortar.
The product is used as a repair mortar on the following substrates:
  • Concrete.
  • Natural stone.
  • Ceramics.
  • Fibre cement.
  • Mortar.
  • Brick masonry.
  • Steel.
  • Iron.
  • Wood.
The product if used for repairing and reprofiling:
  • Filling cavities and voids.
  • Vertical and overhead application.
  • Reprofiling corners and edges.
The product is used for filling and sealing:
  • Joint arrises.
  • Crack arrises.
  • Non-structural static cracks.  

Advantages

  • Easy to mix and apply.
  • Very low VOC (GEV Emicode EC1PLUS).
  • Very good adhesion to many construction materials.
  • Suitable for structural concrete repair, class R4 according to EN 1504-3:2005 (structural and non-structural repair).
  • Hardens without shrinkage.
  • Different coloured components for mixing control.
  • Thixotropic: non-sag in vertical and overhead applications.
  • High initial and final mechanical strength.
  • Good resistance to abrasion.
  • Good resistance to chemicals.
  • Application up to 60 mm thickness in one layer.

Packaging

Parts A+B+C

11 kg pre-batched unit

Colour

Part A

White

Part B

Dark grey

Part C

Sand

Part A+B+C mixed

Concrete grey

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

  • Contributes towards satisfying Indoor Environmental Quality (EQ) Credit: Low-Emitting Materials under LEED® v4.

  • Contributes towards satisfying Materials and Resources (MR) Credit: Building product disclosure and optimization — Environmental Product Declarations under LEED® v4.

  • Contributes towards satisfying Materials and Resources (MR) Credit: Building Product Disclosure and Optimization — Material Ingredients under LEED® v4.

  • Environmental Product Declaration (EPD) in accordance with EN 15804. EPD independently verified by Institut für Bauen und Umwelt e.V. (IBU).

  • VOC emission classification GEV Emicode EC1plus.

APPROVALS / STANDARDS

  • CE marking and declaration of performance based on EN 1504-3: Products and systems for the protection and repair of concrete structures — Structural and non-structural repair.

     

Product Information

Product Declaration

EN 1504-3

R4

Chemical Base

Epoxy resin, selected fillers and quartz sand.

Shelf Life

24 months from date of production.

Storage Conditions

The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.

Refer to the current Safety Data Sheet for information on safe handling and storage.

Density

Mixed resin at +21 °C

(2.00 ± 0.10) kg/l
Technical Information

Compressive Strength

Class R4

(EN 1504-3)

100 MPa

(EN 12190)

Curing time

+10 °C

+23 °C

+30 °C

1 day

30 N/mm2

68 N/mm2

70 N/mm2

3 days

75 N/mm2

88 N/mm2

88 N/mm2

7 days

85 N/mm2

100 N/mm2

-

Flexural Strength

Curing time

+10 °C

+23 °C

+30 °C

1 day

17 N/mm2

28 N/mm2

30 N/mm2

3 days

24 N/mm2

30 N/mm2

37 N/mm2

7 days

35 N/mm2

36 N/mm2

-

Tensile Strength

Curing time

+10 °C

+23 °C

+30 °C

1 day

3 N/mm2

10 N/mm2

16 N/mm2

3 days

12 N/mm2

16 N/mm2

18 N/mm2

7 days

14 N/mm2

20 N/mm2

-

Tensile adhesion strength

Curing Time

Substrate

Curing Temperature

Adhesion strength

7 days

Concrete dry

+20 °C

> 4 MPa

(100 % concrete failure)

7 days

Concrete mat damp

+20 °C

> 2.5 MPa

(100 % concrete failure)

Shrinkage

Restrained shrinkage / expansion

3.2 MPa

Glass transition temperature

+60 °C

(EN 12614)

Reaction to Fire

Class C-s2, d0

Class Bfl-s1

(EN 13501-1)

Application

Application Information

Mixing Ratio

Part A : Part B : Part C by weight

2 : 1 : 2.5

Layer Thickness

Maximum

60 mm

Sag Flow

Non-sag up to 20 mm thickness on vertical surfaces

(EN 1799)

Product Temperature

Maximum

+30 °C

Minimum

+10 °C

Ambient Air Temperature

Maximum

+30 °C

Minimum

+10 °C

Dew Point

Beware of condensation.

Substrate temperature during application must be at least +3 °C above dew point.

Substrate Temperature

Maximum

+30 °C

Minimum

+10 °C

Substrate Moisture Content

Substrates must be dry or matt damp (no standing water).

Pot Life

Temperature

Pot Life

Open Time

+10 °C

150 minutes

-

+20 °C

70 minutes

-

+30 °C

50 minutes

90 minutes

The pot life begins when the resin and hardener are mixed. It is shorter at high temperatures and longer at low temperatures. The larger the quantity mixed, the shorter the pot life. To obtain longer workability at high temperatures the mixed adhesive may be divided into portions. Alternatively chill components A+B before mixing them (although not below +5 °C).
Consumption

Consumption

2.00 kg/m2 per mm of thickness.

Note: Consumption data is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level, wastage or any other variations. Apply product to a test area to calculate the exact consumption for the specific substrate conditions and proposed application equipment.
Application steps

SUBSTRATE QUALITY

CONCRETE, MASONRY, MORTAR AND STONE

        

Concrete and mortar must be at least 28 days old.

Substrates must be sound, clean, dry or matt damp with no standing water. Substrates must also be free from contamination such as ice, dirt, oil, grease, coatings, laitance, efflorescence, surface treatments and loose friable material.

       

STEEL

       

Surfaces must be sound, clean, dry and free of all contaminants such as dirt, oil, grease, coatings and loose friable material.

        

WOOD

        

Surfaces must be sound, clean, dry and free of all contaminants such as dirt, oil, grease, coatings and loose friable material.

SUBSTRATE PREPARATION

Reduced adhesion performance

Surface contamination such as dust and loose material, including that caused during substrate preparation, can reduce the product's performance.

Thoroughly clean all substrate surfaces before application of the product by vacuum or dust removal equipment.

        

CONCRETE, MASONRY, MORTAR AND STONE

       

Suitable techniques for substrate preparation include the following:

  • Abrasive blast cleaning.

  • Needle gunning.

  • Light scabbling.

  • Bush hammering.

  • Grinding.

Prepare the substrate mechanically using a suitable technique.

The substrate has an open textured gripping surface profile.

        

STEEL

        

Suitable techniques for substrate preparation include the following:

  • Abrasive blast cleaning.

  • Rotating wire brush.

  • Grinding.

Prepare the substrate mechanically using a suitable technique.

The substrate has a bright metal finish with a surface profile to satisfy the necessary tensile adhesion strength requirement.

        

 

WOOD

        

Prepare the substrate by planing, sanding or using other suitable equipment.

MIXING

Maintaining workability and handling time.

When using multiple units during application, do not mix the following unit until the previous one has been used.

       

PRE-BATCHED UNITS

       

Mix full units only. Prior to mixing all parts, mix Part A (resin) briefly using a mixing spindle attached to a slow speed electric mixer (maximum 300 rpm).

  • Add Part A to Part B (hardener) and mix Parts A+B continuously for at least 3 minutes until a uniformly coloured smooth consistency mix has been achieved.
  • While mixing Parts A + B, gradually add Part C (aggregate).
  • IMPORTANT: Do not mix excessively. Mix until a uniform consistency is achieved.
  • To ensure thorough mixing pour materials into a clean container and mix again for approximately 1 minute.

APPLICATION

REPAIR

       

Preconditions:

Prior to application, confirm dew point conditions before and during application.

  • On damp prepared concrete substrates, always work the Product well into the substrate.
  • For vertical or overhead applications use Sikadur®-31+ as a primer to improve the bond.
  • Place temporary formwork as required.
  • Apply mixed material to the prepared surfaces with a spatula, trowel or by gloved hand.

For repairs greater than 60 mm deep, the Product must be applied in layers.

  • Scratch the surface of the freshly applied intermediate layer to form a key for the subsequent layer.
  • Apply successive layers once the previous layer has hardened.
  • If the time between layers is going to be more than 2 days, blind the wet mortar to excess with quartz sand immediately after application.

        

JOINT FILLING AND CRACK SEALING

         

  • Apply mixed material to the prepared surfaces with a spatula or trowel.

CLEANING OF TOOLS

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

 

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