Hinesy1275 wrote:
Material used was sometimes referred to as 'pin drop'. It was used on the earlier cars, as well as the firewall, was used on boot boards, dash parcel shelf and the (inner) pockets of the doors bins (glued to the rounded section of the pocket adjacent to the seat). The formed / folded section of the door pocket incorporated fibre board combined with the vinyl of the same grain as the interior seats / door cards - different to the pin drop.
'Pin drop' can be sourced from upholsterers - categorised under boat tonneau materials - it will have a heavier cotton backing, however minus the insulator. May not come in the colour we need, but can be vinyl sprayed.
The later type is coarse grained as commonly sourced these days and was introduced I feel into the early '68 period. This material too, shared the use of the areas described above in the general changeover. F
I always thought the vinyl material with the thin layer of underfelt attached was known as "Hardura". Hardura is still available today but not in a wide range of colours. 850 door liners, dash mats and firewall mats were all made of this material. The Mk1 Cooper S firewall mat was a dark grey Hardura material.
https://www.woolies-trim.co.uk/category/127/hardura