Home > Companies > ECON Polyurethanes, a BASF distributor > BASF Elastospray® 1629/1

Polyurethane (PU) rigid spray foam thermal insulation.

Features and benefits:

  • For application in situ.
  • Suitable for insulating large areas, including irregularly shaped surfaces such as profiled roofs.
  • Provides high compressive strength and compressive creep values.
  • Full adhesion to the substrate without the need for primers or mechanical fixings.
  • Does not contain hydrochlorofluorocarbons (HCFCs).
  • Class 1 rated for surface spread of flame.
  • CE marked, and manufactured in accordance with EN 14315-1: 2013.


Designed to insulate and prevent condensation on a wide range of applications, including:

  • Roofs.
  • Walls.
  • Floors.
  • Soffits.

Suitable substrates include:

  • Concrete.
  • Brick.
  • Wood.
  • Steel.

Standard product features


Polyurethane spray foam, including a mixture of polyols and additives (component A), and methylene diphenylmethane diisocyanate (MDI, component B).

Technical characteristics:

  • Viscosity (at 20°C): Component A: 200 mPa/s; component B: 220 mPa/s.
  • Density (at 20°C): Component A: 1.21 g/cm³; component B: 1.23 g/cm³.
  • Cream time: 4 s.
  • Gel time: 8 s.
  • Tack free time: 9 s.
  • Breaker free rise density (FRB): 31.5 kg/m³.
  • Mixing ratio: 100:103 (component A: component B).
  • Mixing temperature: 30–55°C.
  • Application/ substrate temperature: 5–40°C.
  • Relative humidity: <85%.
  • Substrate moisture content: ≤20%.
  • Reaction to fire (to EN 13501-1): Class 1 (for all thicknesses).



Dependent on application, consult manufacturer for information. The thickness of each applied layer should be between 1–4 cm. In order to maintain an adequate dimensional stability, it is not recommended to apply thicker layers. See manufacturer's literature for performance charts related to different thicknesses.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-55-45/410 Polyurethane (PUR) foam insulation

Product specification

An important note about specifying



ECON Polyurethanes, a BASF distributor


+44 (0)1233 229500

Product reference

BASF Elastospray® 1629/1


[ ______ ]

Manufacturer details

Letraset Building, Wotton Road,
Kingsnorth Industrial Estate,
Ashford, TN23 6LN
Tel +44 (0)1233 229500
NBS Plus