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I am wondering if any of you know about glue/adhesives that do not harden over time after they are applied or glue/adhesives that take a really long time to harden after application. I need the glue to temporarily hold polymer sheets before they are sewed together.

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  • $\begingroup$ Are the polymers hydrophilic? In that case it might be possible to just use water and rely on capillary forces to make the sheets stick together $\endgroup$
    – Michiel
    Jan 12 '14 at 16:48
  • $\begingroup$ I cannot use water. I have tried it since you suggested it. The polymer is hydrophilic, but it does not hold it well enough. Furthermore, there's the problem of evaporation. $\endgroup$ Jan 12 '14 at 19:08
  • $\begingroup$ Ok, too bad. But cool that you tried it! $\endgroup$
    – Michiel
    Jan 12 '14 at 20:34
  • $\begingroup$ What about water soluble adhesives? would that be an option? So you can easily clean the sheets after sewing $\endgroup$
    – Michiel
    Jan 12 '14 at 21:08
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I think you could use some types of Butylrubber. If I'm not wrong from Isobutylene is derived the Post-it adhesive. However you can find Butyl tape easily in every big hardware store (especially nautical) or online.

EDIT

At this link you can find some more information this is an excerpt:

Tapes and flooring adhesives Exxon butyl rubber can be used in adhesive formulations for transparent tape, hot-melt pressure sensitive adhesives, mastic for pipe wrap tape and vinyl floor tile adhesives. It can also be used for semiconducting electrical splicing tape. A rubber splicing tape must be self-fusing; i.e., when wrapped upon itself, it must fuse to the underlying layer, forming a permanent bond. The self-fusing is a result of compounding and eliminates the need for application of a separate adhesive coat. These compounds have very high tensile strengths and exhibit some degree of recovery or elasticity. Electrical splicing tapes based on Exxon butyl rubber have moisture resistance, outstanding aging resistance and good electrical properties. Polyisobutylene elastomers have long been successfully used in pressure sensitive adhesives both as primary elastomers and as tackifiers and modifiers. Exxon chlorobutyl rubber can be used alone or in blends with other polymers to achieve special properties in pressure sensitive adhesives.

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  • $\begingroup$ Thank you. However, I need to sew through the polymer and the adhesive. The needle and the "thread" that I am using aren't very resilient (which is why I need the glue to be non-hardening) . I am not sure whether the needle would be able to handle an extra layer of tape. Do you happen to know if there's a liquid, low-viscous form of butylrubber? $\endgroup$ Jan 12 '14 at 19:11
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    $\begingroup$ @user97554 I've try to find more information but I think very thin layer could be transparent.. $\endgroup$
    – G M
    Jan 12 '14 at 19:24

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