|
|
|
|
|
|
by locofocos
1332 days ago
|
|
|
How does 3M 425 compare to 3M 3340? 3340 is some foil tape I bought from Lowes in the HVAC section, with "cold weather" printed on it in red text. In terms of thickness, I see 425 is 2.8 mils thick, vs 3340 which is 2.0 mils. In terms of temp range, I see 425 goes down a bit colder (-65 F vs -40 F). They seem really similar, like 425 is a somewhat improved version. But it's surprising that this comparison PDF, which shows a lot of 425 alternatives, doesn't show the basic stuff I got from Lowes (3340) https://multimedia.3m.com/mws/media/1390627O/3m-aluminum-foi... |
|
|
Here’s a pdf to help select metal tapes:
https://multimedia.3m.com/mws/media/856073O/3m-metal-foil-ta...
And the data sheets for both tapes:
https://technicaldatasheets.3m.com/en_US?pif=000010?locale=e... https://technicaldatasheets.3m.com/en_US?pif=000116?locale=e...
And some more tape pdfs, honestly a lot of it is super interesting, I never put much thought just into how many different kinds of adhesives there are:
https://multimedia.3m.com/mws/media/1016166O/3m-masking-and-...
https://multimedia.3m.com/mws/media/1015901O/3m-industrial-a...
https://multimedia.3m.com/mws/media/1012104O/3m-converter-ma...