Joined
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31 Posts
This is what I use. It melts and smashes all in one move (against a small anvil pad on my vice) after cutting on the diagonal. Just have to dial the temperature in just right.
130 Watt Hot Knife
130 Watt Hot Knife
130 Watt Hot Knife
$25 USD on Harbor Freight Tools
The 5-1/2 in. blade on this hot knife quickly heats to 975° F to make fast, clean cuts in foam and plastic materials. The hot knife comes with a depth adjusting sled to make repeat cuts or long cuts at a precise depth.
Cuts foam, EIFS, ICF, nylon rope, webbing, synthetic fabric, and plastic
Easy push-button activation, auto-off for safety
Dual-use cutting blade for line and groove cutting
Flat edge shapes candles, foam and other craft materials
Heats-through quickly to give you a quick precision cut every time
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Joined·237 Posts
I used an old iron and it worked ok on polypropylene but didn't do much on thicker polyester, it stopped working and I now use the base as an anvil with the putty knife/propane torch method.
I was going to try that knife for cutting foam but never got around to picking it up, good tip - thanks
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