A nice low-budget solution! Great to have a step-by-step reader to back it up.
I also tested this for my project. Stuff used:
(the links point to Dutch retailers, because the DAP Christopher mentioned couldn’t be found here in The Netherlands)
- An A-branded (thus expensive) 100% silicone-based transparent caulk (€10/$15) here.
- A cheap house-branded transparent silicone caulk (€2/$3) from this retailer.
- Thinner (it’s standard toluene based and freely available).
- Toluene is hard to come by, because EU codes want to ban it for the future; it leads to cancer and damages the central nerve system, so I have read (just don’t take big sniff). But I found some in my school’s chemo-lab, so that was easy & free of charge. Optionally it can be orderer here. The shop is a bit messy, but you must order by article code, after which you get a confirmation email with the price. They deliver to individuals and in any quantity, so that’s a plus.
- Some acrylic to test upon.
- A vaporiser which drives on handpower. Otherwise this looks like a good and cheap electrical solution.
The testing was 4-folded: each solution was mixed with one caulk until a clear and slimy substance occured. It was dried for about 24 hours, and to be short: it failed on all four. Three mixes lost their transparency, and the clear one wouldn’t dry (was mixed to watery). One thing was noticable: toluene isn’t a good mixing solution as thinner is, and is even more expensive, so use thinner for DIY solutions.
Maybe the problem was the compound of the caulk. I tried to cross-examen the ingredients of DAP and my caulks but couldn’t find anything. And in stead of trying all the different caulks at the construction market, it’s gonna be Sort A Clear for now.
