Sikadur®-32+

2-part structural epoxy adhesive for bonding, fixing and anchoring with sustainable benefits

Sikadur®-32+ is a moisture tolerant, structural, 2-part adhesive, based on a combination of epoxy resins and special fillers, designed for use at temperatures between +10 °C and +30 °C.

Application temperature range +10 °C to +30 °C.
Suitable for dry and matt damp concrete substrates.
Easy to mix and apply.
Very good adhesion to a range of construction materials.
Hardens without shrinkage.
Different coloured parts (for mixing control).
No primer needed.
High initial and ultimate mechanical strength.
Impermeable to liquids and water vapour.
Good chemical resistance.

Product Data Sheet Show all documents

Usage

The Product is used as a structural adhesive for bonding the following:

Fresh concrete to hardened concrete.
Concrete elements.
Hard natural stone.
Ceramics and fibre cement.
Mortar, bricks, masonry and render.
Iron and steel.
Wood.
Polyester, epoxy, polyurethane (PU) grouts (e.g. Sika® Icosit® KC Range).
Polyester / fibreglass and epoxy resin materials.

The Product is used as an adhesive for fixing and anchoring the following:

Small anchors.
Fasteners.
Railway fasteners.

The Product is used as a primer for the Sika® Icosit® KC System:

On prepared dry and matt damp concrete surfaces.
On prepared metal surfaces.

Advantages

Application temperature range +10 °C to +30 °C.
Suitable for dry and matt damp concrete substrates.
Easy to mix and apply.
Very good adhesion to a range of construction materials.
Hardens without shrinkage.
Different coloured parts (for mixing control).
No primer needed.
High initial and ultimate mechanical strength.
Impermeable to liquids and water vapour.
Good chemical resistance.

Packaging

Pre-batched Unit (Part A + Part B)

4.5 kg container

Colour

Part A	Light grey
Part B	Dark grey
Parts A+B mixed	Concrete grey

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

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).

APPROVALS / STANDARDS

CE / UKCA marking and declaration of performance based on EN 1504-4:2004 Products and systems for the protection and repair of concrete structures — Structural bonding.
CE / UKCA marking and declaration of performance based on EN 1504-6:2004 Products and systems for the protection and repair of concrete structures — Anchoring reinforcing steel bar.

Product Information

Product Declaration

EN 1504-4: Structural bonding

EN 1504-6: Anchoring

Chemical Base

Epoxy resin

Shelf Life

24 months from date of production

Storage Conditions

The product must be stored in original, unopened and undamaged 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 +23 °C.

(1.5 ± 0.1) kg/l

Technical Information

Compressive Strength

61 N/mm²

(EN 12190)

Curing time	+10 °C	+23 °C	+30 °C
1 day	~5 N/mm²	~35 N/mm²	-
3 days	~40 N/mm²	~42 N/mm²	~55 N/mm²
7 days	~45 N/mm²	~48 N/mm²	~60 N/mm²
14 days	~51 N/mm²	~52 N/mm²	-

Modulus of Elasticity in Compression

Cured 14 days at +23 °C

~3300 N/mm²

~5000 N/mm²

(EN 13412)

Flexural Strength

Curing time	+10 °C	+23 °C	+30 °C
1 day	~10 N/mm²	~18 N/mm²	-
3 days	~35 N/mm²	~37 N/mm²	-
7 days	~40 N/mm²	~40 N/mm²	~35 N/mm²
14 days	~42 N/mm²	~42 N/mm²	-

Flexural E-Modulus

Cured 14 days at +23 °C

~3700 N/mm²

Tensile Strength

Curing time	+10 °C	+23 °C	+30 °C
1 day	~10 N/mm²	~16 N/mm²	-
3 days	~28 N/mm²	~30 N/mm²	-
7 days	~34 N/mm²	~35 N/mm²	-
14 days	~36 N/mm²	~37 N/mm²	-

Shear Strength

~11 MPa

(EN 12615)

Tensile adhesion strength

Pull-Out Resistance

≤ 0.60 mm at load of 75 kN

Pull-Out Railway Applications	No damage at 60 kN
Fastening Systems	~100 kN

Bond or Adhesion Strength

Pass

Curing Time	Substrate	Curing Temperature	Adhesion Strength
7 days	Concrete dry	+10 °C	> 3 N/mm² 100% concrete failure
7 days	Concrete moist	+10 °C	> 3 N/mm² 100% concrete failure
7 days	Steel	+25 °C	~15 N/mm²

Creep

Durability / Creep under tensile loads

≤ 0.6 mm at load of 50 kN after 3 months

Shrinkage

< 0.1 %

(EN 12617-1)

Coefficient of Thermal Expansion

(8.7 × 10⁻⁵ ± 0.1 × 10^-5) 1/K linear expansion between +23 °C and +60 °C

(EN 1770)

Electrical Resistivity

4.3 GΩ

(EN 50122-2)

Glass transition temperature

+64 °C

(EN 12614)

Heat deflection temperature

Curing time	Curing temperature	HDT
7 days	+23 °C	+47 °C

Thermal Compatibility

Durability

Pass

Resistance to moisture

Sensitivity to Water

Pass

Reaction to Fire

Class C-s1,d0

Class B_FL-s1

(EN 13501-1)

Application

Application Information

Mixing Ratio

Part A : Part B

1 : 2 by weight or volume

* It is essential that both components are fully used, ensuring no excess material remains within the container prior to mixing. Failure to do so could adversely affect the chemical reaction.

Layer Thickness

Maximum

1 mm

Sag Flow

Non-sag up to 1 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.

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

Substrate Temperature

Maximum	+30 °C
Minimum	+10 °C

Pot Life

Temperature	Pot Life (200g)
+10 °C	~120 min
+23 °C	~45 min
+30 °C	~35 min

The pot life begins when Parts A+B are mixed. It is shorter at high temperatures, and longer at low temperatures. The greater the quantity mixed, the shorter the pot life. To obtain longer workability at high temperatures, the mixed adhesive may be divided into smaller quantities. Another method is to chill Parts A+B before mixing (although not below +10 °C).

Open Time

Temperature	Open Time
+10 °C	~150 min
+23 °C	~90 min
+30 °C	~60 min

Consumption

1.5 kg/m² per mm of thickness, if used as a continuous layer.

0.7 kg/m² –1.0 kg/m² is the quantity normally needed for bonding wet fresh concrete to hardened prepared concrete.

For small anchors or fasteners (consumption in grams per hole):

Hole / Rebar Diameter	50 mm Depth	80 mm Depth	100 mm Depth	120 mm Depth	150 mm Depth
10 mm / 6 mm	3.8 g	6.0 g	7.5 g	9.0 g	11.3 g
12 mm / 8 mm	4.7 g	7.5 g	9.4 g	11.3 g	14.1 g
14 mm / 10 mm	5.7 g	9.0 g	11.3 g	13.6 g	17.0 g

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 OR 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.

CERAMICS OR GLASS

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

IMPORTANT

Siliconised surfaces

The Product will not adhere to substrates with a siliconised surface.

SUBSTRATE PREPARATION

IMPORTANT

Reduced adhesion performance

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

CONCRETE, MASONRY, MORTAR OR STONE

Substrates must be prepared mechanically using suitable equipment to achieve an open-textured, gripping surface profile.

Suitable techniques for substrate preparation include the following:

Abrasive blast cleaning
Needle gunning
Light scabbling
Bush hammering
Grinding

STEEL

Suitable techniques for substrate preparation include the following:

Abrasive blast cleaning
Rotating wire brush
Grinding

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.

CERAMICS OR GLASS

Prepare the substrate by 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) ensuring all material has been removed and added to Part B.
Mix Parts A+B continuously for at least 3 minutes until a uniformly coloured, smooth consistency mix has been achieved.
Do not overmix.
To ensure thorough mixing pour materials into a clean container and mix again for approximately 1 minute.
Mixing time for Parts A+B = 4 minutes.

APPLICATION

Provide temporary support for heavy components positioned vertically or overhead.

BONDING APPLICATIONS

On damp prepared concrete substrates, always apply by brush and work the Product well into the substrate.
Apply the mixed Product to the prepared substrate by brush, roller, spray or trowel ensuring uniform and complete coverage.
For optimum adhesion, apply the adhesive to both substrates that require bonding.
For bonding wet fresh concrete to hardened prepared concrete, place the concrete whilst the resin layer is still tacky. Note: If the product becomes glossy and loses tackiness, apply another coat and proceed to place concrete.

ANCHORING APPLICATIONS

For small anchors or fasteners, clean the hole thoroughly with a special round steel brush and with compressed air (minimum pressure 6 bar), starting from the bottom.
Once the hole is completely clean and free of any loose particles or dust, pour the Product in the hole, avoiding entrapping air.
Insert the anchor or fastener with a rotary motion within the adhesive open time. Note: Some of the adhesive must flow out of the hole.
During the resin hardening time the anchor must not be moved or loaded.

SIKA® ICOSIT® KC SYSTEM APPLICATIONS

For information on the application of Sikadur®-32+ in conjunction with a Sika® Icosit® KC system, refer to the relevant product Method Statement or contact Sika Technical Services for advice.