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Sikaflex Construction Purform, Low-Modulus Sealant for Masonry Facades, Interior & Exterior, Grey, 600 mL

Sikaflex Construction Purform, Low-Modulus Sealant for Masonry Facades, Interior & Exterior, Grey, 600 mL

Adhesives & Sealants
SIKA

Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.

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General Specifications
Packaging 600 mL
Usage Elastic Joint Sealing In Facades, Windows, Doors
Usage Area Interior & Exterior
Color Grey
Chemical Base Polyurethane
Storage Conditions +5 °C to +30 °C - Store in sealed, undamaged packaging in dry conditions. Refer to packaging and safety data sheet.
Density (1.45 ± 0.1) kg/L
Service Temperature -40 >< +70
Application Time N/A
Curing Time 24 hours
Application Thickness N/A
Application Method Gun
UV Resistant Yes
Moisture Resistant Yes
Mold Resistant No
Paintable No
Sealant Yes
Flexible Yes

Low-modulus sealant for concrete and masonry facades

Sikaflex Construction Purform is a 1-part, non-sag, elastic polyurethane joint sealant. Due to its good application properties and high movement capability it durably seals movement and connection joints in concrete and masonry facades.

  • Easy to extrude and tool.
  • High movement capability: ±25 % (ISO 9047), ±50 % (ASTM C719).
  • Low stress on substrate due to the low modulus of the sealant.
  • Good resistance to weathering.
  • Good mechanical resistance.
  • Good adhesion to many construction materials.
  • Monomeric diisocyanate content < 0.1 %: no user safety training needed (REACH restriction 2023, Annex XVII entry 74).
Usage
The Product is used for elastic joint sealing and weatherproofing of movement and connection joints in building envelopes. Sikaflex Construction Purform is used for the following application areas:
  • Around window and door frames.
  • Around facade elements.
  • Around precast elements.
  • EIFS facades.
Sikaflex Construction Purform is used for interior and exterior applications.
Advantages
  • Easy to extrude and tool.
  • High movement capability: ±25 % (ISO 9047), ±50 % (ASTM C719).
  • Low stress on substrate due to the low modulus of the sealant.
  • Good resistance to weathering.
  • Good mechanical resistance.
  • Good adhesion to many construction materials.
  • Monomeric diisocyanate content < 0.1 %: no user safety training needed (REACH restriction 2023, Annex XVII entry 74).
 
Packaging

600 ml foil pack

20 foil packs per box

Refer to the current price list for available packaging variations.
Colour

Available in a range of colours, refer to the price list for further information.
Technical Information
Shore A Hardness

Cured 28 days at +23 °C and 50 % R.H.

> 20

Tensile Strength

Cured 28 days at +23 °C and 50 % R.H.

0.96 MPa

Secant Tensile Modulus

Cured 28 days at +23 °C and 50% R.H. Measured at 100% elongation at +23 °C.

0.30 N/mm2

Cured 28 days at +23 °C and 50% R.H. Measured at 100% elongation at -20 °C.

0.60 N/mm2

Movement Capability

± 25 %

(EN ISO 9047)

± 50 %

(ASTM C719)

Elastic Recovery

Cured 28 days at +23 °C and 50 % R.H.

90 %

Tear Propagation Resistance

Cured 28 days at +23 °C and 50 % R.H.

6.0 N/mm

Service Temperature

Maximum

+70 °C

Minimum

-40 °C

Resistance to Weathering

10

(ISO 19862)

 

Joint Design

For movement joints, the width must be at least 8 mm and should not exceed 40 mm. For non-movement joints such as connection joints in interior areas, the joint width can be less than 8 mm.

The joint dimensions must be designed to suit the movement capability of the sealant. In all cases joints must be at least 8 mm deep or a have a width to depth ratio of 2 : 1 whichever is greater.

For more information about joint design and calculations refer to the Sika document Design guideline: Dimensioning of construction joints or contact Sika Technical Services.

Application Information
Sag Flow

20 mm profile tested at +50 °C.

0 mm
Product Temperature

Maximum

+40 °C

Minimum

+5 °C
Ambient Air Temperature

Maximum

+30 °C

Minimum

+5 °C
Substrate Temperature

Maximum

+40 °C

Minimum

+5 °C

Beware of condensation. Substrate temperature during application must be at least +3 °C above dew point.
Backing Material

Use closed cell, polyethylene foam backing rod.
Curing Rate

At +23 °C and 50 % R.H.

3 mm / 24 h
Skin Time

At +23 °C and 50 % R.H.

60 minutes
Tooling Time

At +23 °C and 50 % R.H.

40 minutes