Sikaflex® Crystal Clear
Multipurpose, solvent-free, one-part silane-based adhesive
Sikaflex® Crystal Clear is a 1-component, solvent-free, multipurpose adhesive and sealant with a crystal clear appearance.
- 100% crystal clear / transparent
- Good workability
- Low shrinkage during cure
- Especially for home improvement sector
- Can be used on damp concrete
- Very good adhesion on many typical building materials
Usage
Sikaflex® Crystal Clear is designed as a multipurpose adhesive and is suitable for most surfaces including metal, glass, concrete, plaster, plasterboard, wood surfaces, painted enamel, polyester and plastics.Sikaflex® Crystal Clear is designed as a sealant for vertical and horizontal indoor connection joints between partition walls, for metal and wood constructions.
Advantages
- 100% crystal clear / transparent
- Good workability
- Low shrinkage during cure
- Especially for home improvement sector
- Can be used on damp concrete
- Very good adhesion on many typical building materials
Packaging
300 g cartridge (290 ml), 12 cartridges per box
Colour
Transparent
Product Details
APPROVALS / CERTIFICATES
- EN 15651-1 F EXT-INT CC
- ISO 11600 F 20 LM
Composition
Silane terminated polymer
Shelf life
Sikaflex® Crystal Clear has a shelf life of 12 months from the date of production, if it is stored properly in undamaged, original, sealed packaging, and if the storage conditions are met.
Storage conditions
Sikaflex® Crystal Clear shall be stored in dry conditions, protected from direct sunlight and at temperatures between +5 °C and +25 °C.
Density
| 1.05 kg/l approx. | (ISO 1183-1) |
Shore A hardness
| 30 approx. (after 28 days) | (ISO 868) |
Tensile strength
| 2.0 N/mm2 approx. | (ISO 37) |
Secant tensile modulus
0.30 N/mm2 approx. at 60 % elongation (23 °C) | (ISO 8339) |
Elastic recovery
70 % approx. | (ISO 7389) |
Tear propagation resistance
| 4.0 N/mm approx. | (ISO 34) |
Service temperature
−40 °C to +70 °C
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 ≥6 mm and ≤20 mm. A width to depth ratio of 2:1 must be maintained.
Joints ≤10 mm in width are for crack control and therefore non-movement joints. What is relevant, is the joint width at the time of application of the sealant (guide value of +10 °C).
For larger joints please contact our Technical Service Department.
Application
Sag flow
| 0 mm (20 mm profile, 23 °C) | (ISO 7390) |
Ambient air temperature
+5 °C to +40 °C, min. 3 °C above dew point temperature
Relative air humidity
30 % to 90 %
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
| 30 minutes approx. (23 °C / 50 % r.h.) | (CQP 019-1) |
Consumption
In spots:
- 1 cartridge for 100 x 3 cm spots (diameter = 3 cm; thickness = 0.4 cm)
In stripes:
- Using a nozzle with 5 mm diameter, bead yields approx. 15 m length per 290 ml cartridge (20 ml approx. per linear meter)
APPLICATION INSTRUCTIONS
For the application of Sikaflex® Crystal Clear all standard construction guidelines apply.
SUBSTRATE PREPARATION
The substrate must be clean, dry, sound and homogeneous, free from oils, grease, dust and loose or friable particles. Sikaflex® Crystal Clear 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 pre-treatment procedures shall be followed:
Non-porous substrates
Aluminium, anodised aluminium, stainless steel, PVC, 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.
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 and/or Sika® TopClean T. Once cured, residual material can only be removed mechanically.