Speaker Dope

[genmin]

Hello to all, will put trust in the responses I get, send me down the right path. I have two 1940's Stephens P-52L's 15" drivers. Both are excellent one with no issues whatsoever. One although has a break at the frame edge on the cone paper. It is a hairline about 7/8" long and you can not see through it. On the opposite side there is some rubbing wear or a scuff from an installation from years past. I would like to keep these as original as long as possible and not re-cone until needed. I need a product name for repairing this type of crack and patch. Where available it may be and how much overlap of the product into the cone paper beyond the area of concern. All will be appreciated, Thanks genmin

[blumenco]

Parts Express has "speaker repair glue."

should get you along.

-Clark

[Piek]

White wood glue with some water (the one that gets transparent when dried) if its just paper and maybe a piece of pocket tissue at the back, depending on stability.

-Micha

[badman]

Micha is absolutely correct.

[genmin]

So what you are saying is that a semi brittle white glue is better than a resilient rubber solvent base like is used around the perimeter of the cone?

[badman]

You can use rubber cement, but the woodglue tends to soak into paper cones very well. It's not as brittle as you think, when it's thin. It's also easy to thin and apply, and since it's water solvent, it doesn't outgas it's solvents potentially deteriorating already old adhesives in the assembly.

I actually use this stuff extremely liberally inside sealed cabinets. Gloop it in, rotate, let it cure (keep rotating so it gets into all the gaps.

Does a great job of preventing airleaks and strengthening the cab.

[HK26147]

genmin
One off the first speaker repair kits I ever bought included a Material Data Sheet that listed the contents of the included glue.
It was the exact same makeup as white flexible fabric glue.
In fact another kit included a bottle of Aleene's Super Tacky.
Roscoe Flexbond is the same stuff.

I have used thin black wrapping paper as a backer; doped with that glue. It can be thinned with water and the smallest amount of a surfactant to improve absorption.
It drys quickly, especially with a hair dryer set to low.

Syd