Rock Mineral Wool - Knauf Insulation Rocksilk® RS80

Knauf Insulation Rocksilk® RS80


Multi-Application, Ground floors, Internal floors, Separating floors, Fabrication, Pitched roofs at rafter level, Internal walls / partitions, Light steel frame walls, Timber frame walls


Rock Mineral Wool


Rocksilk® RS80 is a rock mineral wool slab, designed for use in multiple applications, or for fabrication where mechanical characteristics and thermal performance are key.

It is non-combustible with the best possible Euroclass A1 reaction to fire classification, and is manufactured using our unique bio-based binder, ECOSE® Technology.


  • Single slab can be used for multiple applications.
  • Can be manufactured with a factory applied foil or tissue facing, offering solutions for a wide variety of applications.
  • Manufactured from mineral wool which provides the best levels of sound absorption and reduction compared to other mainstream insulants.
  • Manufactured from rock mineral wool which has a melting temperature of over 1000°C to provide longer periods of fire resistance than other mainstream insulants.

For historical versions of product documentation, or documents relating to any discontinued products, please contact us with your requirements at [email protected].



Thickness (mm) Length (mm) Width (mm) Thermal Conductivity (W/mK) R-value (m²K/W) Euroclass Reaction to Fire Classification Quantity per pack Packs per pallet
50 1200 600 0.034 1.45 A1 6 16
75 1200 600 0.034 2.20 A1 4 16
100 1200 600 0.034 2.90 A1 3 16

Certification & Memberships

Eurofins Gold Eurofins Gold
Euroclass A1 Reaction to Fire Classification Euroclass A1 Reaction to Fire Classification
CE Marking CE Marking
EN 15804 EN 15804
Made in Britain Made in Britain
DECLARE 'Red List Free' DECLARE 'Red List Free'


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