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Old 02-21-2013
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Proper Masking Tape

I've used the 3M 14 day blue tape in the past when applying bottom paint with good results. However, now that I'm applying many layers of barrier coat to the bottom(Interlux 2000e), I'm not certain if this is the best tape to use. I expect to take around 7 days to complete the project and want to tape the boat only once during this period and have some sort of confidence that I can remove that tape at the end without messing up the job. Any suggestions? Thanks
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Old 02-21-2013
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Re: Proper Masking Tape

I have switch to 3m green tape. I have found that the blue leaves glue residue.

Also have used green Frog Tape on inside house painting and WAS REALLY IMPRESSED, no bleeding whatsoever.
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Re: Proper Masking Tape

Actually I was concerned with pulling off the tape and taking some to the barrier coat with it or possibly leaving a portion of the tape afixed to the boat. I'll look into that Frog tape.
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Old 02-21-2013
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Re: Proper Masking Tape

You pretty much have to retape with any type of paint when multi coats are involved as they will all have lifting and tearing issues if the tape is not pulled within the drying window
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Re: Proper Masking Tape

Frog tape. period.
No bleed through, great ability to take curves, it is still pliable and removable after being exposed to weather for 2.5 years.

That good.

(Yep, at the end of last season i found a forgotten scrap still masking off the tail end of a sail track after the repaint of 2010.)
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Old 02-22-2013
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Re: Proper Masking Tape

Call 3M, there's an 800-number on every box or package. They will tell you how many days each type of tape can be left out in the sun before it starts to break down and becomes hard to remove.

They've got some specialty products like a silver masking tape, which can be left out for a month and still peel off cleanly. Expensive--but if you need two days to tape, then leave it for the next weekend, and get rained out, and leave it for the next..etcetera? Sometimes it can pay to buy the good stuff.

Different products from different manufacturers may use the same color--but not be the same of course. Best to call directly, 3M is great at helping you find the right product in their line.
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Re: Proper Masking Tape

the type of tape is not that important because you have to remove and re-tape on each coat. if the barrier coat sets up on the tape it will be very hard to remove the tape and might peel the coating.
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Re: Proper Masking Tape

I was hoping to find something that did not need removal after each coat. I'm awaiting to hear from Interlux if they have a suggestion and if not then I'll give 3M a call.
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Re: Proper Masking Tape

it's not the tape but the coating that is the problem. 2000e is a two part epoxy and when it is set up it will not allow the tape to be removed without cracking the coating. if the tape is not removed before the coating sets up you will have a big problem on your hands.
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Re: Proper Masking Tape

I've painted a few things in my years on the planet.

I always peel off the tape as soon as the risk of runs is past, but well before the paint starts to set.

Never let the paint dry while still taped.

Ken
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