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This is received wisdom but I read on another forum..........
Rocksil RS45 / Rockwall RWA 45 = 703.
And
Rocksil RS60 / Rockwall RW3 = 705
This was in answer to the question " what are the UK alternatives to Owen Cornings ? "
I'm not sure that'll be of any help and please double check this information yourself.
Jam
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