Fasteners and Hardware
When you want to install a threaded bolt or screw and be able to later remove the fastener, there are a couple easy options. In our boat
building class with the Saginaw Bay Community Sailing Association, we keep a wax toilet ring for on the work
bench and stick a bunch of screws in it. We just pull these out as we need them. The wax gets in the threads and we can back the screw out easily after the epoxy has cured. You can also put auto paste wax on a piece of cheesecloth, grab the threads firmly below the head
and back it out with a cordless drill in reverse. This applies a nice thin coat of wax evenly over the entire thread pattern.
Spray is a quick and convenient adhesion preventer. Simply place the fastener on a paper towel and spray the threads, butter the threads with a bit of thickened epoxy so air isn’t trapped, push the fastener into the oversized, partially filled hole and let the epoxy cure. Back it out after the epoxy hardens and now you’ve cast threads in the epoxy.
Polyvinyl alcohol or PVA is a green liquid available at hobby shops and craft shops. Dip the fastener in or brush it on the threads, let it air dry and install the fastener like I just described for Pam.
There are a number of aerosol mold
release sprays on the market. A couple we’ve used around the tech shop are Stoner® E-497 and E-499 Thermoset Mold
Release. They work
well for all thermoset resin systems used in most boats – epoxy, polyester and vinyl ester. They do not contain any silicone, which you want to avoid in any mold release, especially a spray. Silicone aerosol sprays can contaminate the entire shop if you’re not careful.
From WEST SYSTEM® “EpoxyWorks” ☞ https://epoxyworks.com/index.php/wha...poxy-to-stick/