Sikaflex®-140 Construction

• LEED v2009 IEQc 4.1: Low-Emitting Materials - Adhesives and Sealants

• ASTM C920-11 class 25

i-Cure® Technology polyurethane

12 months from the date of production

The product must be stored in original, unopened and undamaged packaging in dry conditions at temperatures between +5 °C and +25 °C.
Always refer to packaging.

−40 °C min. / +70 °C max.

The joint widths must be designed to suit the movement capability of the sealant. The joint width must be a minimum of 6 mm and a maximum of 35 mm. A width to depth ratio of 2:1 must be maintained. Joint widths less than 10 mm are generally for interior connection joints or crack control joints and therefore considered as non-movement joints.

Interior connection joints or crack control joints are considered non-movement joints.

Example for typical joint dimensions for joints between concrete elements for exterior applications considering 25 % movement capability according to ASTM C 719:

All joints must be correctly designed and dimensioned in accordance with the relevant standards and codes of practice before their construction. The basis for calculation of the necessary joint widths are the type of structure, dimensions, technical values of the adjacent building materials, joint sealing material and the specific exposure of the building and the joints.

For joint design and calculations contact Sika® technical Services for additional information.

+5 °C min. / +40 °C max.

+5 °C min. / +40 °C max.

Minimum +3 °C above dew point temperature

Use closed cell, polyethylene foam backing rod.

*Sika Corporate Quality Procedure

These figures are theoretical and do 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.

Priming / pre-treatment

Note: For more details of the primer or pre-treatment products such as application, flash-off and waiting times, refer to the individual Product Data Sheet. Contact Sika Technical Services for additional information.

Note: Primers and activators are adhesion promoters and not an alternative to improve poor preparation / cleaning of the joint surface. Primers also improve the long-term adhesion performance of the sealed joint.

Note: Adhesion tests on project specific substrates must be performed and procedures agreed with all parties before full project application. For more detailed advice and instructions contact Sika Technical Services.

• The substrate must be sound, clean, dry and free of all contaminants such as dirt, oil, grease, cement laitance, old sealants, poorly bonded paint coatings or friable particles which could affect adhesion of the sealant.
• The substrate must be of sufficient strength to resist the stresses induced by the sealant during movement.
• Use wire brushing, abrading, grinding or grit blasting equipment to prepare the surface.
• Repair all damaged joint edges with suitable Sika repair products
• New or refurbished joints must be saw-cut.
• Where joints in substrate are saw cut. After sawing, all slurry material, must be flushed away and joint surfaces allowed to dry.
• All dust, loose and friable material must be completely removed from all surfaces before application of any activators, primers or sealant.

For optimum adhesion, joint durability and critical, high performance applications such as joints on multi-storey buildings, highly stressed joints, extreme weather exposure or water immersion / exposure. The following priming and/or pre-treatment procedures must be carried out:

Non-porous substrates

Aluminium, anodised aluminium, stainless steel, PVC, galvanised steel, powder coated metals, PVDF coated metals and glazed tiles:

1. Lightly roughen the substrate with a fine abrasive pad.
2. Clean and pre-treat with  Sika® Aktivator-205, Sika® Aktivator-100 or Sika® Cleaner P applied with a clean cloth.

Copper, brass and titanium-zinc:

1. Lightly roughen the substrate with a fine abrasive pad.
2. Clean and pre-treat with  Sika® Aktivator-205 applied with a clean cloth.
3. Wait until the flash-off time has been achieved.
4. Apply Sika® Primer-3 N with a brush.

PVC

1. Clean and pre-treated with Sika® Primer-215 applied by brush.

Porous substrates

Note: Concrete that is 2–3 days old, or with a matt-wet (surface dry), must be primed using Sika® Primer-3 N applied by brush.   

Concrete, aerated concrete, cement-based renders, mortars and brick:

1. Apply Sika® Primer-3 N or Sika® Primer-115 by brush.

1-part ready to use

Clean all tools and application equipment with Sika® Remover-208 immediately after use. Hardened material can only be removed mechanically.