If I understand the question correctly, paper drywall tape is just embedded in a thin coat of joint compound. So yes, gypsum. I'd imagine there are other ways? But that is the industry standard - everyplace I've ever been, anyway.
Question about the tape sticker on the seams
Good afternoon. Tell me what you are sticking paper tape for drywall seams on. Do I understand correctly that this is a special polymer composition, (NOT GYPSUM!)?
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YouTube is your friend:Can you give a link or a photo to it? The fact is that when we put the tape in the seam in Russia, and close it with plaster putty, it subsequently dries and swells. I don't have a photo of what it looks like right now, I'll try to simulate the situation at work and show how it looks
Good thing I'm not a drywall guy, then. I always thought your run of the mill drying compounds were gypsum based.Paper joint tape in North America is generally adhered and embedded with drying type joint compounds which are primarily limestone (calcium carbonate) w/a PVA binder, not gypsum, but can also be be adhered and embedded with gypsum setting-type compounds.
I do not do a lot of drywall, FYI. And I can't comment on that particular product.But it's not him? I saw several times on YouTube how they took it out of such a bucket and put it on the tape. We've tried everything here-the effect is the same. Dries and swells View attachment 115188
But nothing should swell when it dries. Bulging often comes from leaving too much mud under the tape - meaning you need more pressure on the knife to squeeze out the excess.
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