MTI hose question

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MTI hose question

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Kacordy	K Kacordy posted 5 Years Ago HOT Topic Details
K Group: Forum Members Posts: 17, Visits: 341	I would like to try MTI hose. Out of curiosity I took a 2 foot section of MTI hose, added an elbow at one end, sealed it with yellow sealant tape, at the open end I wrapped and sealed it with sealant tape, then applied vacuum. The MTI Hose holds at 20 very well. I thought the white covering was supposed to be porous and let the gasses seep through while blocking the resin? I’m I supposed to take a fine needle and poke holes through the membrane to get it to work? Thanks, Allen
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Hanaldo	Hanaldo posted 5 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	+x Kacordy - 9/23/2020 2:45:45 AM The white material is not porous. If it was porous it would not hold vacuum. Check out the gauge at 20. Allen I can not tell from the photo what you are doing, but you are jumping to conclusions here. I can assure you the white material is a semi-permeable membrane, and it works as intended when used properly. Not only have I used it personally, but it is an award winning internationally used product. DD-Compound post on here semi-regularly, so they will probably be along in a bit and reply themselves. In the meantime, this is a very strange test. 20mm/Hg is no where near full vacuum, which indicates that you are pulling against a major air leak - likely the MTI hose. It is very difficult to see any wrinkles in the hose in that photo, but to me that looks like the hose when it is not under vacuum. Watch this video, this is how you use the hose:
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