The good ones are industrial tapes, from speciality suppliers, at a slightly higher price. You can get acrylic-based tapes which make a near-permanent bond, but not from your average newsagent or supermarket: they only sell the cheapest Chinese packaging stuff which sticks very poorly. The acrylic adhesives are very variable: different additives 'tune' them for different applications. Think 'Duct tape" for an example of a rubber adhesive. The rubber adhesives "bleed" around the edges a bit, and are not suitable for tents imho. We can also use polyurethane as an adhesive, but it does not come on a tape because it cures. It turns out that there are two main adhesives used for flexible tapes: rubber and acrylic.
And we are trying to use silicone-impregnated fabrics. In fact, silicone surfaces are usually used as release surfaces for al sorts of tapes, simply because things won't stick to them. (It's all to do with van der Waals forces and dangling hydrogen bonds.) Then you have the slippery silicone surfaces, and they are in a class of their own. Some surfaces have a high surface energy, which usually makes them easy to bond to, while others have a low surface energy. What sticks to one surface won't stick very well to another. The science (some might say art) of bonding to surfaces seems to be extremely complex. "Sticky tape is sticky tape, right?" Unfortunately not. Some aspects of how I use tape have not really been used on tents before as far as I know.
I outline two ways here: tape and seam sealer. So some way of making the seams waterproof and strong is required. With the very light fabrics we are using here in some places the weave can also distort under the tension from the thread, making the holes even bigger. These holes often get larger under tension. Send any questions or comments to the designer Roger CaffinĪ fabric may be very waterproof, but as soon as you put a needle through it there are holes. DIY - My Designs - Seam Sealing DIY - My Designs - Seam Sealing
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