Timeline for Is water resistant PVA (type 3) a good option for sealing indoor kitchen concrete countertop with a sink?
Current License: CC BY-SA 4.0
9 events
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| Jan 6, 2022 at 7:13 | comment | added | Martynas Žiemys | Thanks a lot for all the insight. That's very useful. I guess I am leaning towards epoxy resin coating now. I'l research it more. | |
| Jan 6, 2022 at 7:11 | vote | accept | Martynas Žiemys | ||
| Jan 5, 2022 at 20:26 | comment | added | fixer1234 | One last thought, PVA is water-resistant but not waterproof. Once it is fully cured, it will resist occasional temporary wetting. But it is still affected by water over time, and it will degrade. It is easily stained, so it doesn't provide great protection against the concrete getting stained. You might get away with it as a sealer for a countertop that doesn't get or stay wet often (as an absorbed sealant rather than a surface coating), but it wouldn't last long coating a sink. | |
| Jan 5, 2022 at 19:53 | comment | added | fixer1234 | but you would still get staining because those sealants aren't 100%, or don't remain near 100% for long, and a surface coating of PVA is just a poor material for a work surface. There are many concrete countertop sealers available off-the-shelf, but not all are food-safe, and for the sink, you will probably need a resin coating. Here's a video comparing some of the off-the-shelf sealers: How to Seal a Concrete Counter Top. For a sink, you would want a resin-based one. If that coating gets scratched or dinged, you'd want to repair that. | |
| Jan 5, 2022 at 19:53 | comment | added | fixer1234 | especially with the pressure of the water weight, that waterproofing is useless; you need an actual barrier between the water and the concrete. That difference in applications is where the difference in advice comes from. A kitchen countertop doesn't contend with those issues, but you don't want sink water to migrate through, and blended PVA won't help with that. It also needs to deal with the problems outlined in the middle paragraph. If there was no sink, it would be adequate to merely seal the countertop with something that penetrates, (cont'd) | |
| Jan 5, 2022 at 19:52 | comment | added | fixer1234 | @MartynasŽiemys, good follow-up questions. I have some experience with concrete and making typical concrete applications "waterproof", but a countertop is different. Concrete, itself, is "waterproof" in the sense that it doesn't redissolve, but it is porous. Water can migrate through it, and internal water can crack the concrete if it freezes. So typical waterproofing is intended to mitigate those problems from "incidental" water, like temporarily getting wet from rain. For an application like a basement wall, where ground water can sit against it for a long time, (cont'd) | |
| Jan 5, 2022 at 18:33 | comment | added | Martynas Žiemys | Firstly, thanks a lot for response. But how can I trust this answer? What are you basing it on? I find mixed information. Some say PVA type 3 is a good choice for making concrete waterproof, because it soaks deep into concrete, some say it cannot be made waterproof. If you do not have experience in making concrete countertops, how do you know? I guess I'll keep researching and make a few test pieces to test a few options before making the real thing... Anyway, it's not huge, it's cheap and it would not be a terrible loss if this project failed after half a year. | |
| Jan 5, 2022 at 18:28 | history | edited | fixer1234 | CC BY-SA 4.0 |
fixed typo
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| Jan 5, 2022 at 17:09 | history | answered | fixer1234 | CC BY-SA 4.0 |