Sikaflex® PRO-3 Purform®

• Conformity with LEED v4 EQc 2: Low-Emitting Materials
• VOC emission classification GEV-Emicode EC1^PLUS, licence number 11289/20.10.00

• CE Marking and Declaration of Performance to EN 15651-4 - Sealants for non-structural use in joints in buildings - Sealants for pedestrian walkways. Classification: PW EXT-INT CC 25 HM

• CE Marking and Declaration of Performance to EN 14188-2 Class 35- Joint fillers and sealants - Cold applied joint sealants
• Tensile Properties, Adhesion, Change of Volume tests ISO 11600 F Class 25 HM, Sikaflex® PRO-3 Purform, SKZ, Test Report No. 205279/19-I
• Standard Specification for Elastomeric Joint Sealants, ASTM C 920, Sikaflex® PRO-3 Purform, Test report No. 1725T0005
• Chemical Resistance, DIN EN 14187, Sikaflex® PRO-3 Purform, SKZ, Report No. 208323/20
• Determination of the staining, ASTM 1248-04, Sikaflex® PRO-3 Purform, SKZ, Test Report No.205279/19-VI

• Determination of the staining ISO16938-1 Sikaflex® PRO-3 Purform, SKZ, Test Report No.205279/19-III

• Chemical Resistance, Adhesion and cohesion Change of Weight, DIBT: 2003-03, Sikaflex® PRO-3 Purform, SKZ, Test Report No. 205279/19-V
• ISEGA Certificate for foodstuff area usage▪
• Outgassing VOC/SVOC, CSM procedures, Sikaflex® PRO-3 Purform, Fraunhofer, Certificate, No. SI 1909-1140
•  Testing of the non-structural joint sealant in accordance with ISO 11618:2018-08 Pedestrian walkways
•  ISO 19862 Buildings and civil engineering works - Sealants - Durability to extension compression cycling under accelerated weathering

Purform® Polyurethane Technology

15 months from date of production

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

EN 15651-4: PW EXT-INT CC 25 HM

EN 14188-2: Class 35

• Non-staining on many natural stones according to ASTM 1248-04 / ISO 16938-1.
• To confirm suitability, tests must be carried out according to ISO 16938-1/ ASTM 1248-04 before using on natural stones and full project application.

Resistant to many chemicals. Refer to EN 14187-6 SKZ test report for chemical resistance and EN 15651-4 SKZ test report for water and salt water. Contact Sika Technical Services for additional information.

-40°C min. / +80°C max.

• The joint dimensions must be designed to suit the movement capability of the sealant. The joint width must be a minimum of 10 mm and a maximum of 40 mm.
• A width to depth ratio of 1:0,8 for floor joints must be maintained (for exceptions, see table below).
• For larger joints, contact Sika ® Technical Services for additional information.

Example for typical joint widths for joints between concrete elements for interior applications considering 25 % movement capability according to EN 15651-4:

Example for typical joint widths for joints between concrete elements for exterior applications considering 25 % movement capability according to EN 15651-4:

• 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 details of joint design and calculations refer to the following document, Sika® Additional Technical Information: Dimensioning of construction joints.

Use closed cell, polyethylene foam backing rod

+5 °C min./+40 °C max.

+5 °C min./+40 °C max. Minimum +3 °C above dew point temperature

* Sika Corporate Quality Procedure

Note: Adhesion tests on project specific substrates must be performed and procedures agreed with all parties before full project application.

• 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 removal techniques such as wire brushing, grinding, grit blasting or other suitable mechanical tools.
• Repair all damaged joint edges with suitable Sika repair products
• 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.

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: For more details of the pre-treatment products such as application and flash-off times, refer to the individual Product Data Sheet.

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 or glazed tiles: Lightly roughen surface with a fine abrasive pad. Clean and pre-treat using Sika® Aktivator-205 applied with a clean cloth.
• Metals, such as copper, brass and titanium-zinc, must be cleaned and pre-treated using Sika® Aktivator-205 applied with a clean cloth. Allow the pre-treatment to achieve the required waiting time before applying Sika® Primer-3 N by brush.
• PVC must be cleaned and pre-treated using 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-115 applied by brush.   

• Concrete, aerated concrete and cement-based renders, mortars and bricks surfaces must be primed using Sika® Primer-3 N or Sika® Primer-115 applied by brush.

Asphalt (acc. to EN 13108-1 and EN 13108-6)

• Fresh cut or existing cut asphalt must have a clean bonding surface with minimum 50% exposed aggregate and must be primed using Sika® Primer-115 or Sika® Primer-3 N applied 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. For cleaning skin, use Sika® Cleaning Wipes-100.