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Sikaflex PRO-3 SL, Self-Leveling Polyurethane Sealant

Sikaflex PRO-3 SL, Self-Leveling Polyurethane Sealant

Adhesives & Sealants
SIKA

Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.

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General Specifications
Packaging 600 ml / 23 L
Usage Horizontal movement/connection joints: floors, pedestrian and traffic areas
Usage Area -
Color Concrete Grey and Black
Chemical Base i-Cure® Technology polyurethane
Storage Conditions +5…+25 °C, dry; away from sunlight
Density ~ 1.40 kg/l
Service Temperature -40 °C min. / +70 °C max
Application Time -
Curing Time ~3.5 mm/24 hours (23 °C / 50 % r.h.) (CQP 049-2)
Application Thickness -
Application Method -
UV Resistant -
Moisture Resistant -
Mold Resistant -
Paintable -
Sealant -
Flexible -

HIGH-PERFORMANCE, SELF-LEVELING SEALANT FOR FLOORING AND CIVIL ENGINEERING APPLICATIONS

Sikaflex® PRO-3 SL is a 1-component, moisture-curing, self-leveling, elastic joint sealant with high mechanical and chemical resistance.

Usage

Sikaflex® PRO-3 SL is designed for horizontal applications in movement and connection joints in floors, pedestrian and traffic areas (e.g. parking decks, car parks), warehouses and production areas, applications in the food industry, ceramic tiles such as in public buildings etc. and floor joints in tunnel construction.

Advantages
  • Movement capability of ± 35% (ASTM C 719).
  • Very high mechanical and chemical resistance.
  • Bubble-free curing.
  • Self-leveling.
  • Good adhesion to most construction materials.
  • Solvent-free.
  • Very low emissions.
Packaging

600 ml foil pack, 20 foil packs per box

23 l hobbock

Colour

Concrete Grey and Black

Typical Product Data
ENVIRONMENTAL INFORMATION

- EMICODE EC1 PLUS R.
- LEED v4 EQc 2: Low-Emitting Materials.

APPROVALS / STANDARDS

- EN 15651-4 PW EXT-INT CC 25 HM.
- ISO 11600 F 25 HM.
- ASTM C 920 class 35.
- ISEGA certificate for foodstuff area usage.
- Resistant against waste water according to DIBt guidelines.
- Resistant against diesel and jet fuel according to DIBt guidelines.

Chemical Base

i-Cure® Technology polyurethane

Shelf Life

Sikaflex® PRO-3 SL has a shelf life of 15 months from the date of production, if it is stored in undamaged, original, sealed packaging, and if the storage conditions are met.

Storage Conditions

Sikaflex® PRO-3 SL shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +5 °C (+41 °F) and +25 °C (+77 °F).

Density

~ 1.40 kg/l (~ 11.7 lb/gal) (ISO 1183-1)

Shore A Hardness

28 approx. (after 28 days) (ISO 868)

Secant Tensile Modulus

~0.45 N/mm 2 (~65.3 psi) at 100 % elongation (23 °C (73 °F)) (ISO 8339)
~0.80 N/mm 2 (~116 psi) at 100 % elongation (−20 °C (68 °F))

Movement Capability

±25 % (ISO 9047)
±35 % (ASTM C 719)

Elastic Recovery

~90 % (ISO 7389)

Tear Propagation Resistance

~8.0 N/mm (ISO 34)

Service Temperature

−40 °C (104 °F) to +70 °C (+158 °F)

Chemical Resistance

Sikaflex® PRO-3 SL is resistant to water, seawater, diluted alkalis, cement slurry and water dispersed detergent, diesel and jet fuel according to the DIBt guidelines. Sikaflex® PRO-3 SL is not resistant to alcohols, organic acids, concentrated alkalis and concentrated acids as well as hydrocarbons.

Joint Design

The joint width must be designed to suit the joint movement required and the movement capability of the sealant. The joint width shall be ≥ 10 mm (0.394 in) and ≤ 35 mm (1.38 in). A width to depth ratio of 1:0.8 must be maintained (for exceptions, see table below).
Standard joint widths for joints between concrete elements for interior applications:
Joint distance [m] Min. joint width [mm] Min. joint depth [mm]
2 10 10
4 10 10
6 10 10
8 15 12
10 18 15
Standard joint widths for joints between concrete elements for exterior applications:
Joint distance [m] Min. joint width [mm] Min. joint depth [mm]
2 10 10
4 15 12
6 20 17
8 28 22
10 35 28
All joints must be correctly designed and dimensioned in accordance with the relevant standards, before their construction. The basis for calculation of the necessary joint widths are the type of structure and its dimensions, the technical values of the adjacent building materials and the joint sealing material, as well as the specific exposure of the building and the joints.
For larger joints please contact our Technical Service Department.

Application
Sag Flow
Self-leveling, can be used on slopes ≤ 3%
Ambient Air Temperature

+5 °C (+41 °F) to +40 °C (+104 °F), min. 3 °C (37 °F) above dew point

Substrate Temperature

+5 °C (+41 °F) to +40 °C (+104 °F)

Backing Material

Use closed cell, polyethylene foam backing rods.

Curing Rate
~3.5 mm (~0.138 in)/24 hours (23 °C (73 °F) / 50 % r.h.)(CQP 049-2)
Skin Time
~100 minutes (23 °C (73 °F) / 50 % r.h.)(CQP 019-1)
Consumption
Joint length [m] per 600 ml foil packJoint width [mm] Joint depth [mm]
610 10
3.315 12
1.920 16
1.225 20
0.830 24
SUBSTRATE PREPARATION

The substrate must be clean, dry, sound and homogeneous, free from oils, grease, dust and loose or friable particles. Sikaflex® PRO-3 SL adheres without primers and/or activators. However, for optimum adhesion and critical, high performance applications, such as highly stressed joints, extreme weather exposure or water immersion, the following priming and/or pre-treatment procedures shall be followed:

Non-porous substrates Aluminium, anodised aluminium, stainless steel, galvanised steel, powder coated metals or glazed tiles have to be cleaned and pre-treated using Sika® Aktivator-205, wiped on with a clean towel. Before sealing, allow a flash-off time of > 15 minutes (< 6 hours). Other metals, such as copper, brass and titanium-zinc, also have to be cleaned and pre-treated using Sika® Aktivator-205,wiped on with a clean towel. After the necessary flash-off time, use a brush to apply Sika® Primer-3 N and allow a further flash-off time of > 30 minutes (< 8 hours) before sealing the joints. PVC has to be cleaned and pre-treated using Sika® Primer-215 applied with a brush. Before sealing, allow a flash-off time of > 30 minutes (< 8 hours).

Porous substrates Concrete, aerated concrete and cement based renders, mortars and bricks shall be primed using Sika® Primer-3 N applied with a brush. Before sealing, allow a flash-off time of > 30 minutes (< 8 hours).

For more detailed advice and instructions please contact the local Sika Technical Services Department. Note: Primers are adhesion promoters. They are neither a substitute for the correct cleaning of a surface, nor do they improve the strength of the surface significantly.

CLEANING OF TOOLS

Clean all tools and application equipment immediately after use with Sika® Remover-208 and/or Sika® TopClean T. Once cured, residual material can only be removed mechanically.