Andre,
appreciate the info, hope they come back at you.
Isn't that M3 product quite close to OC 705? 705 has also got about 90-100 kg/m³
Here are GFRs (in kPa*s²/m²) for German products I could come up with. You can see the density by looking at the name. DP-
3 has about
30 kg/m³ for example.
"Heraklith Heralan" Rockwool:
DP-3: > 5
DP-4: ≥ 7
DP-5: > 7
DP-7: > 7
Dp-10: ≥ 20
DP-12: ≥ 25
DP-15: ≥ 25
(
Knauf Insulation)
"Rockwool" rockwool:
Termarock 30: > 9
Termarock 40: > 12
Termarock 50: > 15
Termarock 100: > 43
(
Baushop.DE: 350.857 günstige Artikel,
News auf Bau online - baustoffmarkt-online)
"Isover" Rockwool:
SP 120: ≥ 40
SP 150: ≥ 50
SP 180: ≥ 70
"HOMATHERM flexCL", made from cellulose, which has also good absorption coefficients:
about 70 kg/m³: 43 - 76
(
Saint-Gobain Isover G+H AG - mit dem Scout zum richtigen Dämmstoff)
Greets,
Jules