Mixed up a batch of West 105 / 206 (slow) with a very large proportion of cab-o-sil. I've mixed 105/206 several times, but this was a first.
Within about 3 minutes, the mixture got very hot. I was using an old plastic take-out food bowl and it got too hot to hold. I even started to see steam / smoke come out of the bowl. Within 10 minutes, chunks started to form in the mixture. I was using 206 - SLOW hardener - but this hardened up really fast.
I've made 10-12 batches of West before and it has gotten warm, but nothing like this.
I used about 7-8 squirts of both fluids (I use the measured pumps to get my mixture right.)
It is about 95 degrees today. Probably 90+ in the hangar right now.
Is this normal? Or did I make a big mistake somewhere?
The parts I was bonding / filling both appear okay. Warm but not hot. It's a thin layer applied of the mix between fiberglass and aluminum.
I left the bowl outside on a pile of gravel in case it catches fire - still very hot, but no flames.
Within about 3 minutes, the mixture got very hot. I was using an old plastic take-out food bowl and it got too hot to hold. I even started to see steam / smoke come out of the bowl. Within 10 minutes, chunks started to form in the mixture. I was using 206 - SLOW hardener - but this hardened up really fast.
I've made 10-12 batches of West before and it has gotten warm, but nothing like this.
I used about 7-8 squirts of both fluids (I use the measured pumps to get my mixture right.)
It is about 95 degrees today. Probably 90+ in the hangar right now.
Is this normal? Or did I make a big mistake somewhere?
The parts I was bonding / filling both appear okay. Warm but not hot. It's a thin layer applied of the mix between fiberglass and aluminum.
I left the bowl outside on a pile of gravel in case it catches fire - still very hot, but no flames.
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