A closed cell, high density insulation with low warning potential, as it is free of all ingredients that contribute to global warming due to greenhouse gas effect. The material is suitable for almost all areas of the building envelope and delivers low thermal conductivity owing to its closed-cell structure combined with airtightness, while permitting insulation without thermal bridges. It delivers simple and fast installation, high compressive strength, and water vapour permeability.

Features and benefits:

  • Low thermal conductivity due to closed-cell structure.
  • Air-tight.
  • Insulation without thermal bridges.
  • Suitable for insulating large areas, including irregularly shaped surfaces such as profiled roofs.
  • Water-tight and water resistant.
  • Good mechanical properties.
  • High compressive strength.
  • Hydrofluorocarbon (HFC) free.
  • Appropriate water vapour permeability.
  • Full adhesion to the substrate without the need for primers or mechanical fixings
  • Extremely low global warming potential (GWP) of 1 and zero ozone depletion (ODP).
  • Manufactured by BASF, the leading global producer of polyurethane spray foam.
  • CE marked, and manufactured in accordance with EN 14315-1: 2013.


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

  • Pitched roofs.
  • External roofs.
  • Internal walls.
  • Agriculture.
  • Floors.
  • Soffits.
  • Timber frame walls.

Suitable substrates include:

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

Standard product features


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

Technical characteristics:

  • Viscosity (at 25°C): Component A: 260 mPa/s; component B: 220 mPa/s.
  • Density (at 25°C): Component A: 1.18 g/cm³; component B: 1.23 g/cm³.
  • Cream time: 4 s.
  • Gel time: 7–8 s.
  • Tack free time: 9–10 s.
  • Breaker free rise density (FRB): 33 kg/m³.
  • Mixing ratio: 100:104 (component A: component B).
  • Mixing temperature: 5–40°C.
  • Application/ substrate temperature: 5–40°C.
  • Relative humidity: <85%.
  • Substrate moisture content: ≤20%.
  • Deformation (to EN 1605): Load: 40 kPa; temperature: 70±1°C.
  • Reaction to fire (to EN 13501-1): Class E (for all thicknesses).
  • Water absorption (to EN 1609): Total immersion: <2%; partial immersion: <0.20 kg/m².
  • Water vapour resistance factor (to EN 12086): ≥70 µ.
  • Resistance to rainwater: 1800 Pa.
  • Closed cell content (to ISO 4590): ≥90%.
  • Compressive strength (to EN 826): ≥200 kPa.
  • Substrate adhesion strength (to EN 14315-1): >100 kPa.



Dependent on application, consult manufacturer for information. The thickness of each applied layer should be between 1.5–4 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 LWP


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Manufacturer details

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