6 ms·

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

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-foil-tape-425-specialty-tape-sheet.pdf https://multimedia.3m.com/mws/media/1390627O/3m-aluminum-foi...

radicality 4y ago
The 425 seems to have higher steel adhesion and tensile strength. 3340 looks to be specifically geared towards HVAC. Here’s a pdf to help select metal tapes: https://multimedia.3m.com/mws/media/856073O/3m-metal-foil-tapes-brochure-6-2012-high-resolution.pdf 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=en-US https://technicaldatasheets.3m.com/en_US?pif=000010?locale=e... https://technicaldatasheets.3m.com/en_US?pif=000116?locale=en-US 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-surface-protection-products.pdf https://multimedia.3m.com/mws/media/1016166O/3m-masking-and-... https://multimedia.3m.com/mws/media/1015901O/3m-industrial-adhesives-and-tapes.pdf https://multimedia.3m.com/mws/media/1015901O/3m-industrial-a... https://multimedia.3m.com/mws/media/1012104O/3m-converter-markets-selection-guide.pdf https://multimedia.3m.com/mws/media/1012104O/3m-converter-ma...

radicality 4y ago

The 425 seems to have higher steel adhesion and tensile strength. 3340 looks to be specifically geared towards HVAC. Here’s a pdf to help select metal tapes: https://multimedia.3m.com/mws/media/856073O/3m-metal-foil-tapes-brochure-6-2012-high-resolution.pdf 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=en-US https://technicaldatasheets.3m.com/en_US?pif=000010?locale=e... https://technicaldatasheets.3m.com/en_US?pif=000116?locale=en-US 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-surface-protection-products.pdf https://multimedia.3m.com/mws/media/1016166O/3m-masking-and-... https://multimedia.3m.com/mws/media/1015901O/3m-industrial-adhesives-and-tapes.pdf https://multimedia.3m.com/mws/media/1015901O/3m-industrial-a... https://multimedia.3m.com/mws/media/1012104O/3m-converter-markets-selection-guide.pdf https://multimedia.3m.com/mws/media/1012104O/3m-converter-ma...