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red_stapler
red_stapler SuperDork
7/29/19 9:51 p.m.

I can personally vouch for this stuff staying attached at 120mph

https://www.amazon.com/Wall26-Upgraded-Strong-Flexible-Material/dp/B07V2CZLR6/ref=sr_1_2?keywords=Wall26+24%22x+60%22+%282+by+5+feet%29+.30mil+Super+Strong+Flexible+Magnet+Material&qid=1564454998&s=gateway&sr=8-2

*edit*  The GRM sticker is close to 19 years old on whatever magnetic I got from McMaster Carr back then.

iceracer
iceracer UltimaDork
7/30/19 11:21 a.m.

How thick is your material ?

Mine is just over  .003"

ShinnyGroove
ShinnyGroove Reader
7/30/19 2:23 p.m.

Got this stuff from Amazon and made numbers on it with black electrical tape.

https://www.amazon.com/gp/product/B005HY9KDM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

 

Stays on the car fine, have gotten up to 125mph at Road Atlanta with no issues.

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