AC foam on backs of grills

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himhimself
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AC foam on backs of grills

#1 Post by himhimself » Sat Aug 28, 2021 10:36 am

Well damn, damn, damn! Decided to finally pull the grills off my otops and glue on the foam sheets I picked up ages ago. I've sprayed adhesive and stuck grill cloth on without issue several times, but nooooo, not today. Looks like spiderman hand-vomited all over. Two different types, one 3M the other Loctite. The nozzles seemed nice and clean, but have them both soaking in solvent anyway now, and letting the gooey strings dry so I can hopefully clean them off. What the heck? Any thoughts? Any better way to stick foam to metal? Different glue? Roll on?
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

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Seth
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Re: AC foam on backs of grills

#2 Post by Seth » Sat Aug 28, 2021 11:31 am

I had the same thing occur. Not sure if it was the nozzle, or maybe it's a function of the "grade". IIRC, I got the high strength stuff. But, there was a medium and low tack option to choose from aswell. Personally, I wondered if either of the lower strength options would have sprayed on without the cob webs. Haven't got around to testing the hypothesis yet. I just ended up putting the foam on the outside of the grill instead. Which is... meh, not exactly what I wanted. But, aesthetically not too bad either.
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Two 2x6 shorty SLA Pro's
One T39, 16", 3012LF loaded
Tall AutoTuba, 20" wide, 2x 8" MCM 55-2421
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Radian
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Re: AC foam on backs of grills

#3 Post by Radian » Sat Aug 28, 2021 12:45 pm

Good food, good people, good times.

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himhimself
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Re: AC foam on backs of grills

#4 Post by himhimself » Sat Aug 28, 2021 12:59 pm

One side done. What a pain. Could be better, probably will try again someday but this will be good enough for now. For sure will look fine in the dark, but the next couple things coming up our outside during the daytime. Oh well
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2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

himhimself
Posts: 566
Joined: Fri Nov 13, 2015 9:34 pm
Location: Bloomington IN

Re: AC foam on backs of grills

#5 Post by himhimself » Sat Aug 28, 2021 3:04 pm

Second set went a bit better. Not sure the foam is adhered well in the middle. Maybe too hot and humid today. I think the compression around the edges will keep it in place. All four strapped back on their wagon now.
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

Bruce Weldy
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Re: AC foam on backs of grills

#6 Post by Bruce Weldy » Sat Aug 28, 2021 3:22 pm

himhimself wrote:
Sat Aug 28, 2021 3:04 pm
Second set went a bit better. Not sure the foam is adhered well in the middle. Maybe too hot and humid today. I think the compression around the edges will keep it in place. All four strapped back on their wagon now.
Sounds like you didn't give 'em a long time to cure. I always shoot my grills, then lay on the foam and put newspaper between the that and the next grill.....stack 'em up, put a piece of plywood on 'em and some weight on that ..... leave it overnight to cook....

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
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2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

himhimself
Posts: 566
Joined: Fri Nov 13, 2015 9:34 pm
Location: Bloomington IN

Re: AC foam on backs of grills

#7 Post by himhimself » Sat Aug 28, 2021 3:36 pm

Yeah, probably in too much of a hurry Bruce. I left them compressed of a couple hours, but with it being 91F and humid today, that probably wasn't long enough. Up on stands dealing out fearful db, it shouldn't matter :-)
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

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Strange Kevin
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Re: AC foam on backs of grills

#8 Post by Strange Kevin » Sat Aug 28, 2021 3:50 pm

I ended up getting a can of the Gurilla Glue spray adhesive last time as it was the only stuff I could fine in stock.

Turns out, I think I like it for attaching grills. It doesn't really spider web like the other stuff.

I spray a heavy coat on the back of the grill and then light coat on the foam. Give them a few minutes or so to tack up and carefully unit the two.

Here's some artic "Minis" 2x6 SLA I used it on th3 other day.
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himhimself
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Joined: Fri Nov 13, 2015 9:34 pm
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Re: AC foam on backs of grills

#9 Post by himhimself » Sat Aug 28, 2021 4:49 pm

Strange Kevin wrote:
Sat Aug 28, 2021 3:50 pm
Here's some artic "Minis" 2x6 SLA I used it on th3 other day.
They look great, nice job. Might have to look for some gorilla spray next time.
2xT30 (20", 3012LF)
2xT30 (21", 3012LF)
4xOtop J-array (Beta12, melded/straight piezos)
Truck Tuba (MCM)
Next up: 2xJack12 or family of table tubas

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