I used several layers of foil, sort of rolled and crimped on the ends. The foil was slightly bigger than the inside of the cooler, so that I could mold it to the edges and corners. Not sure if it's a long term solution but it turned out a really tasty beer.
Quote from: HoosierBrew on December 02, 2016, 09:25:05 PMI used several layers of foil, sort of rolled and crimped on the ends. The foil was slightly bigger than the inside of the cooler, so that I could mold it to the edges and corners. Not sure if it's a long term solution but it turned out a really tasty beer.I imagine your rolled edges create rigidity. Aluminum isn't an issue?
I just made a mash cap out of 1/2" thick closed cell foam yoga mat or camping ground pad material. It works well. Its easy to cut to shape. I did add some 1/4" wood strips to the top of the cap to serve as stiffeners. I used Goop to glue the strips onto the foam. Goop is full of nasty smelling volatiles, so it took several days of airing out for the smell to go away. But the good thing about Goop is it has a tenacious grip. Silicone glue would be less toxic initially, but it doesn't stick well enough. I do have a piece of aluminum flashing bolted with SST bolts on the underside of the cap to deflect the return flow along the underside of the cap. Aluminum is not a problem for use in wort since it is essentially insoluble when the pH is between 4.5 and 8.5. It will corrode when the pH is outside that range. We are safe to use aluminum in the mash tun and kettle. I tried making a mash cap out of corroplast material, but that warps badly when heated and I could get the hollow cells sealed well enough.
Yoga mats? Like Subway? There's gotta be a better way, IMOSent from my SAMSUNG-SM-G920A using Tapatalk
What about when you use a RIMS system? Also, does it make that much of a difference at the micro level of 5 gallon batches?Sent from my SAMSUNG-SM-G920A using Tapatalk