Application

Designed for civil and industrial movement, expansion, control and dilatation joints in architectural and heavy construction. To be used as a sealant between concrete, mortar, brickwork, natural and synthetic stone, metal, steel, aluminium, wood, ceramic tiles, rigid plastics, etc.

Description

A highly elastic, low modulus polyurethane sealant, with good UV-resistance and excellent adhesion to typical construction materials. It is single-component and cures with moisture to form a flexible sealant which can be overpainted after curing is finished. The sealant is non sagging, highly thixotropic, easy smoothing and has good workability. CE marked.

Porous (absorbing) surfaces such as concrete, mortar, etc. must be primed with Köster PU Primer 110. Köster PU Primer 120 should be used for non-porous (non-absorbing) surfaces such as glazed tiles, rigid plastics and aluminium.

Applications:

Designed for civil and industrial movement, expansion, control and dilatation joints in architectural and heavy construction. To be used as a sealant between concrete, mortar, brickwork, natural and synthetic stone, metal, steel, aluminium, wood, ceramic tiles, rigid plastics, etc.

General information

Material

Polyurethane

Consumption

1.3 kg/L void (approximate)

Technical characteristics

Viscosity: Non sag

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Uniclass 2015

Pr_30_31_76_65 Polyurethane (PUR) construction joint sealantsPrimary

CAWS

E40/530 Sealant

Specification data - Polyurethane (PUR) construction joint sealants

Product Reference

Köster PU 907

Standard product features

Material:

  • Polyurethane.
  • Consumption:
  • 1.3 kg/L void (approximate).
  • Technical characteristics:
  • Viscosity: Non sag.
  • Specific gravity: 1.32 g/cm³ (approximate).
  • Curing time: 2 mm after 24 hours (at +25°C, 50% RH).
  • Shore A-hardness: 25 (approximate).
  • Elongation at break: 600% (approximate).
  • E Modulus: 0.22 MPa.
  • Recovery from deformation: 85%.
  • Shrinkage: 5%.
  • Admissible joint movement: ±25%.
  • Temperature resistance: -30 to +80°C.

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