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I know of the masking tape and superglue thing, and I have a deep dislike of it. Fundamentally it's unreliable and more expensive than double sided tape. I've tried it with a number of tapes a few times and seen everything from glue squeezeout to straight failure. I wouldn't put anything of value at risk to such a poor alternative. Glad it didn't write anything off!

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That's one of the largest sources of the problem. Ben is very poor at qualifying his information, and unfortunately new builders do not have the critical thinking skills to do anything but take him at his word. Masking tape and CA is poor at best, and as a professional woodworker by day such half-measures simply do not confer reliability. If you're against the wall and nothing else is available, it would be better than nothing. If Ben was willing to compensate people who lost money due to this shoddy technique failing, fair enough. As such he takes zero ownership of the amount of bad information he puts out into the wild. Apologies for the rant, however responsibility in guaranteeing your information as being fit for purpose is an important aspect to any sort of instructional work.

I've used the 3M pressure-sensitive film adhesive for almost two decades now for guitars and all manner of other woodworking tasks. Especially for routing templates and layout work. Other sorts of double-stick tape - such as carpet tape - tend to be thicker and more liable to move through their gummy nature. A product of their intended end use. The 3M tape was designed for the print industry in joining rollstock ends from bale to bale. Its properties align very neatly with that we need from a tape, and it works very well as long as the surfaces are flat and clean. Dust tends to reduce efficacy. Being pressure-sensitive, ensuring a strong bond by cinching it between a clamp enhances the bond hugely. The adhesive on masking tapes is not very good at resisting movement from shear forces.

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29 minutes ago, Prostheta said:

I've used the 3M pressure-sensitive film adhesive for almost two decades now for guitars and all manner of other woodworking tasks. Especially for routing templates and layout work. 

Can you tell me which one (model #)? The roll I have is the 3M from Stewmac. Not sure if it's the same thing.

 

9 hours ago, Prostheta said:

I know of the masking tape and superglue thing, and I have a deep dislike of it. Fundamentally it's unreliable and more expensive than double sided tape. I've tried it with a number of tapes a few times and seen everything from glue squeezeout to straight failure. I wouldn't put anything of value at risk to such a poor alternative. Glad it didn't write anything off!

I've found blue 3M painters tape and CA to be much less expensive ($8 for 100 meter roll and $3 for a couple tubes of CA) than double adhesive tape (Stewmac $20.88 for a 33 meter roll). Again, maybe my source of the double adhesive is the problem.

Glue squeeze-out is never an issue because I use small drops evenly spaced. I've always found it difficult to get the pieces apart when I'm done, which has given me more and more confidence in this technique as time goes by.  

I'm relatively new to all of this, so I'm always open to suggestions from people like you who do this professionally.

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The CA+masking tape trick has its place. My main gripe with it is how damn tough it can be to separate the two pieces once bonded. I'll use it if I have nothing else available at the time but when it grips, it grips with ferocity.

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I've forgotten which part number it is now. The tape that StewMac sell is also available from G&W, albeit in a larger and wider roll for less money (as I recall). RS Components in the UK have a variety of different 3M products with different adhesion strengths and film thicknesses. I think I can work it out again. Let me have a look....

I think it's 3M's 9088 tape:

https://uk.rs-online.com/web/p/double-sided-plastic-tapes/5034890/

Tesa also make a similar product:

https://uk.rs-online.com/web/p/double-sided-plastic-tapes/4362835/

I'm a curmudgeonly old bastard now, and not one for taking expensive risks over the sake of pennies. Film tapes work admirably, and are a single product with known working properties. Made for the end purpose. If we used DST more at my workplace (we use toggle clamps for shaping templates) a product that is designed for the job would be the only choice. Painter's tapes are low adhesion, and the substrate itself has built-in stretch. 3M DST has around five times the adhesive strength. So much so, that I find using a few small squares at the extremities of routing templates is more than sufficient, and extremely economical.

I'm all for "tricks" (although I wouldn't use cheap words such as "trick" and "hack") however consistency and reliability take pole position for me every time.

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