George Posted January 28, 2021 Share Posted January 28, 2021 (edited) Apologies for making a topic just for a single question, did a search but can't find a decent answer. Sealing PVC ductwork... taking a look at the data sheets for the proprietary duct sealant products (e.g. Soudaduct), they just appears to be decorators caulk, with a little more flex. Has anyone just used caulk instead? In a domestic set up I can't imagine the sealant is under very much pressure. I would also be taping. Alternatively I could use general purpose silicone, which will seal anything. Edited January 28, 2021 by George Link to comment Share on other sites More sharing options...
phatboy Posted January 28, 2021 Share Posted January 28, 2021 I used Soudalduct, and found it was thicker and a lot more 'sticky' than caulk. It seemed to grip as soon as the 2 parts joined. It's hardly expensive, and I used about 3/4 of a tube for the whole install. Link to comment Share on other sites More sharing options...
George Posted January 28, 2021 Author Share Posted January 28, 2021 It's not expensive but I can only find a 10 box for £55. Link to comment Share on other sites More sharing options...
Temp Posted January 29, 2021 Share Posted January 29, 2021 Some on ebay. Link to comment Share on other sites More sharing options...
JFDIY Posted January 29, 2021 Share Posted January 29, 2021 I got some Domas DDseal from my electrical wholesaler without too much trouble. If memory serves it seemed to be the only thing that was specifically quoted as being suitable for PVC and metal. Other products I found only referred to metal ducting. 1 Link to comment Share on other sites More sharing options...
George Posted January 29, 2021 Author Share Posted January 29, 2021 Nice one - managed to find that product individually. Got some other bits and bobs too. Link to comment Share on other sites More sharing options...
Savage87 Posted January 29, 2021 Share Posted January 29, 2021 (edited) This is what I used and it's good and cheap. https://www.toolstation.com/premium-universal-acrylic-sealant/p43528 Edited January 29, 2021 by Savage87 Link to comment Share on other sites More sharing options...
TimCx Posted October 7, 2022 Share Posted October 7, 2022 Just in case its of use to anyone in the future, I checked with Soudal about using Soudalduct with plastic ventilation pipe, I said I wanted to check because it only mentions metal ducting, the technical advisor said that was its primary use but its fine for plastic as well. Link to comment Share on other sites More sharing options...
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