Lightning Protection roof copper tape fixation and usage of cranflex gasket

[kuwait]

Dear Friends,
We have an installation wherein we intend to use a galvanised iron clamp outdoors to fix copper tape of lightning protection with its base saddle onto the roof ridge ( see picture attached) .Now for preventing galvanic corrosion we intend to use a cranflex gasket at brass to G.I. junction ( as in picture) and to apply Penguard universal paint treatment for the G.I. clamp to prevent chemical corrosion.Kindly advise the solution will endure the outdoor climate and no corrosion ( chemical and galvanic both)is resulted.

A.Climatic conditions
max summer temp : 55 deg celsius
average winter min temp : 0 deg celsius
Max sun radiation temperature : 84 deg celsius
rain : yes
dust : yes

B.Analysis of Junctions
Junction 1: G.I. to G.I. - index 0.0- 0.0 = 0.0 volt ( safe)
Junction 2: G.I.( paint treated) to S.S. - index ??
Junction 3 : G.I.( paint treated) to S.S. - index ??
Junction 4 : Brass to S.S. - index 0.4-0.5 = 0.1 volt ( safe)
Junction 5 : Brass to Copper - index 0.4 - 0.35 = 0.05 volt ( safe)

Brass to G.I. (paint treated) - Cranflex gasket used as in picture.

Kindly advise

 

[7anoter4]

First I think you have to execute the lightning protection installation assisted by a UL approved company.
Second, in my opinion, you have to employ approved [by UL] accessories.
An accessory manufacturer company-as Erico , for instance[ see:

https://www.erico.com/catalog/literature/E1147C-WWEN.pdf

The standards for U.S.A. NFPA 780 and UL96A.
For Europe IEC 62305-3.