[Archers] Spray Foam Target Problems

[Lord Robert Cameron de Grey]

You have to be judicious in how you use it, there has to be enough oxygen penetration as you noted. Like ogres have many layers, so too should spray foam. 

I’ve seen people fill things like plastic bags and the result is not stellar. The concept of spray foam is great if handled properly… And for that reason, I would rather fill a bag with plastic bags rather than foam, depending… A bag full of plastic bags has unusual stopping power for a shaft

My 2¢

Sent from my iCatapult 

> On Jul 31, 2018, at 5:48 AM, Garth Groff and Sally Sanford <mallardlodge1000 at gmail.com> wrote:
> 
> Noble Friends,
> 
> Recently I was working on some targets for a future shoot made from large plastic bottles filled with expanding sealant foam. I was using two products. One was "Great Stuff Big Gap Filler", made by Dow and sold only at Lowes. The other foam was a similar Dow product, maybe the same stuff in a different can (also from Lowes, but apparently sold other places as well). I no longer have a can of this stuff, so I don't remember its name, but it comes in a yellow can.
> 
> I filled the bottles last spring. When I tested one of the targets, I found it spun on its stake, so earlier this month I drilled the bottles for a second stake. My drill came out covered with a sticky goo similar to epoxy that quickly expanded and solidified. Apparently some bottles had pockets of foam that had been cut off from oxygen and so couldn't expand, perhaps the cans weren't shaken enough, or whatever. 
> 
> I scrapped the project (after about $40 worth of foam!) because I cannot be sure there aren't more unexpanded pockets in the bottles. I refuse to offer targets that can ruin our guest's arrows. I still use the foam to patch blow-throughs and other weak spots in my flat archery foam targets (made from closed cell ethylene). The foam there is applied in smaller quantities, and is fully expanded and dry in a few hours.
> 
> Have any of you used these or similar sealant products, and have you had problems?
> 
> Yours Aye,
> 
> Mungo Napier, Laird of Mallard Lodge  🦆
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