Sikaflex® PRO+
SEALANT FOR CONCRETE AND MASONRY FACADES
Sikaflex® PRO+ is a 1-component, moisture-curing, elastic joint sealant.
- Movement capability of ± 35% (ASTM C 719)
- Bubble-free curing
- Good workability
- Good adhesion to many substrates
- Solvent-free
- Very low emissions
Usage
Sikaflex® PRO+ is designed for movement and connection joints in concrete and masonry facades.Advantages
- Movement capability of ± 35% (ASTM C 719)
- Bubble-free curing
- Good workability
- Good adhesion to many substrates
- Solvent-free
- Very low emissions
Packaging
300 ml cartridge, 12 cartridges per box
600 ml foil pack, 20 foil packs per box
Colour
White, Concrete Grey, Black, Dark Grey, Sandstone, Japan Beige, Brick Red, Off White
Not all colours are available in all packaging sizes.
Product Details
SUSTAINABILITY
- EMICODE EC1PLUS R
- LEED® EQc 4.1
- SCAQMD, Rule 1168
- BAAQMD, Reg. 8, Rule 51
APPROVALS / CERTIFICATES
- ASTM C 920 class 35
- ISO 11600 F 25 HM
- EN 15651-1 F EXT-INT CC 25 HM
Composition
i-Cure® Technology polyurethane
Shelf life
Sikaflex® PRO+ 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+ shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +5 °C and +25 °C.
Density
| 1.40 kg/l approx. | (ISO 1183-1) |
Shore A hardness
| 28 approx. (after 28 days) | (ISO 868) |
Secant tensile modulus
| 0.50 N/mm2 approx. at 100% elongation (23 °C ) | (ISO 8339) |
Movement capability
| ± 25% | (ISO 9047) |
| ± 35% | (ASTM C 719) |
Elastic recovery
| 90% approx. | (ISO 7389) |
Tear propagation resistance
| 6.5 N/mm approx. | (ISO 34) |
Service temperature
−40 °C to +70 °C
Resistance to weathering
| 8 | (ISO / DIS 19862) |
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 and ≤ 50 mm. A width to depth ratio of 2:1 must be maintained (for exceptions, see table below).
Standard joint widths for joints between concrete elements
| Joint Distance [m] | Min. Joint Width [mm] | Min. Joint Depth [mm] |
| 2 | 10 | 10 |
| 4 | 15 | 10 |
| 6 | 20 | 10 |
| 8 | 30 | 15 |
| 10 | 35 | 17 |
All joints must be properly designed and dimensioned in accordance with the relevant standards, before construction. Basis for calculation of the necessary joint width are the technical values of the joint sealant and the adjacent building materials, as well as the exposure of the building, type of construction and its dimensions. For larger joints please contact our Technical Service Department.
Application
Sag flow
| 0 mm (20 mm profile, 50 °C) | (ISO 7390) |
Ambient air temperature
+5 °C to +40 °C, min. 3 °C above dew point temperature
Substrate temperature
+5 °C to +40 °C
Backing material
Use closed cell, polyethylene foam backing rods.
Curing rate
| 3 mm/24 hours approx. (23 °C / 50% r.h.) | (CQP 049-2) |
Skinning time
| 70 minutes approx. (23 °C / 50% r.h.) | (CQP 019-1) |
Tooling time
| 60 minutes approx. (23 °C / 50% r.h.) | (CQP 019-2) |
Consumption
| Joint length [m] per 600 ml foil pack | Joint width [mm] | Joint depth [mm] |
| 6 | 10 | 10 |
| 4 | 15 | 10 |
| 3 | 20 | 10 |
| 2 | 25 | 12 |
| 1.3 | 30 | 15 |
SUBSTRATE PREPARATION
The substrate must be clean, dry, sound and homogeneous, free from oils, grease, dust and loose or friable particles. Sikaflex® PRO+ adheres without primers and/or activators.
However, for optimum adhesion and critical, high performance applications, such as on multi-story buildings,
highly stressed joints, extreme weather exposure or water immersion, the following priming and/or pretreatment procedures must 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 EQUIPMENT
Clean all tools and application equipment immediately after use with Sika® Remover-208. Once cured, residual material can only be removed mechanically.