Polyurethane sealant SIKA Flex-740, 300 ml, White

• Polyurethane sealant SIKA Flex-740 Construction Flexible joint sealant. For joints that need to be plastered and painted.
• suitable for moving joints and general concrete structure joints that need to be thinly plastered
• can be painted over after grouting 3-5 days without causing stains
• Excellent resistance to weathering Does not cause stains on plaster and paint.
• Good adhesion to porous surfaces. and excellent adhesion to most metals
• There is curing without air bubbles. Including the emission of volatile substances in a low amount.
• Movement capability ± 35 (ASTM C719)
• Can be used both internally and externally both construction precast concrete slabs window and door frames
• Packaged in a hard tube of 300 ml.
• white glue

Accreditation

• LEED v4 EQ credit: Low VOC emissions
• VOC Test Report, SCAQMD Rule 1168, LEED v4.1, Sikaflex-740 Construction, Eurofins, Report No. 392-2021-00292706_XG_EN.
• VOC Emission Test CDPH, Sikaflex®-740 Construction, Eurofins, Report No.392-2021-00292703_H_EN
• Joint Classification, ASTM C920 , Class 35, Sikaflex®-740 Construction

Technical data

• ASTM C920 - Type S, Grade NS, Movement Class 35, Use T1, NT, M
• Chemical base : Polyurethane i-Cure® Technology
• Density : 1.45 kg./liter
• Shore A Hardness: ~30 (after 28 days) (EN ISO 868)
• Tensile Strength : ~1 MPa (ISO 37)
• Static tensile modulus: 0.6 N/mm2 at 60 % elongation (at 23 °C) (ISO 8339)
• Elongation at break: ~800 % (ISO 37)
• Movement rate: ± 35 % (ASTM C719)
• Shrinkage Rate : ~80 % (ISO 7389)
• Tear strength : ~6.0 N/mm (ISO 34-2)
• Maximum operating temperature: +70 °C, minimum -40 °C.
• Product temperature maximum: +40 °C, minimum +5 °C.
• Maximum ambient temperature: +40 °C, minimum +5 °C.
• Maximum surface temperature: +40 °C, minimum +5 °C.
• The surface temperature must be at least above the dew point temperature: +3 °C.
• Groove reinforcement material: reinforce the joint groove with polyethylene foam.
• Curing rate: ~3 mm/24h (at 23 °C / 50 % r.h.)
• Hardening time: ~60 minutes (at 23 °C / 50 % r.h.)
• Finishing time: ~30 minutes (at 23 °C / 50 % r.h.)

Steps to use

• Mixing : Single ingredient ready to use.
• Implementation Strictly follows the installation procedure as defined in the Method Statements of the User Manual. and instructions for working by always adjusting to the conditions of the actual work site
• Place adhesive tape on both sides of the seam. and remove the tape while the glue is still dry. After finishing the grout
• After preparing the surface Put leveling foam into the joint traces. to leave the required depth
• Apply primer to the joint surface as recommended in the Substrate Preparation section. Do not apply too much primer to avoid a film on the joint surface.
• Cut the cap off the end of the tube. and put a tube of glue into the gun barrel Shoot the glue evenly into the joint groove to fill the groove. Be careful not to cause air bubbles.
• As soon as the caulking is finished Squeeze and press the grout along the grout groove firmly. for good adhesion For a smooth and beautiful finish, use a Sikaflex -740 Construction compatible solution (e.g.
• Sika® Tooling Agent N). Water can be used. I don't recommend any liquid. with solvent as a mixture for storage
• cleaning tools and equipment
  
  • Clean all tools and work equipment immediately. After application with Sika® Remover-208, hardened material can be removed. using only mechanical tools For surface cleaning use Sika® Cleaning Wipes-100.

Additional recommendations

• Store in sealed and undamaged packaging. Stay in a dry area at temperatures between 5 and 25 °C.
• The product life is 12 months from the date of manufacture.

Note: The color of the product shown on the website There may be differences from the color display settings of each screen.