Browse Forums Finishing Touch 1 Oct 20, 2010 10:22 pm Howdy everyone This our second build in Perth, and would really like to know if anyone out there can give us their answers on as to why you "have" to seal the plaster before you paint? We would love to hear all your experiences and answers, as i'm yet to get two of the same from anyone including paint shops and painters Cheers in advance The Feggles Follow Feggle viewtopic.php?f=31&t=34992 Follow lilfeggle viewtopic.php?f=31&t=37149 Asbestosis Sux! Don't breath in Asbestos Re: Why do you have to seal your plaster in Perth before pai 2Oct 20, 2010 11:08 pm because it's set plaster and it is very absorbent. The sealing of the plaster with a sealer ( oil based is best though very smelly) means that the 2 coats of paint applied afterwards of your chosen colour will adhere to the sealer/wall but not soak in. Without a sealer first the paint tends to go a bit chalky and even with an additional coat isn't as long lasting. Re: Why do you have to seal your plaster in Perth before pai 4Oct 21, 2010 9:36 am why is it absorbant? Follow Feggle viewtopic.php?f=31&t=34992 Follow lilfeggle viewtopic.php?f=31&t=37149 Asbestosis Sux! Don't breath in Asbestos Re: Why do you have to seal your plaster in Perth before pai 5Oct 21, 2010 10:54 am The plaster used has lime in it which until it has fully cured can burn the paint when you put it on. The paint will bubble up and look like it has sand in it where it has come into contact with the lime. Most builders will tell you not to paint for 12 months or you can use a sealer to over come this. The other advantage of a sealer is that it acts as a type of primer which helps your paint stick to the wall. Re: Why do you have to seal your plaster in Perth before pai 6Oct 21, 2010 3:48 pm Could we use an oil base paint for the walls, kill two birds with one stone?? Follow Feggle viewtopic.php?f=31&t=34992 Follow lilfeggle viewtopic.php?f=31&t=37149 Asbestosis Sux! Don't breath in Asbestos Re: Why do you have to seal your plaster in Perth before pai 7Oct 21, 2010 4:43 pm A waterbased sealer will work fine and is easy to apply. As it is not your finished coat you do not need to be to fussy with the coverage as long as there are no fat edges or runs. I usually just use a roller getting as close to edges as possible but not worrying to cut it in. Then apply 2 coats of your colour and your done. Re: Why do you have to seal your plaster in Perth before pai 8Oct 21, 2010 4:55 pm I have lime/gypsum white set plaster and have used Dulux Sealer Binder as the first coat. It helps bind the top layer together and makes it harder. Demolition August 2009, Construction Started September 2009, Completed December 2010 Re: Why do you have to seal your plaster in Perth before pai 9Oct 21, 2010 6:03 pm thanks everyone who has helped. I don't mind sealing, but just asking as to why you have to ) Follow Feggle viewtopic.php?f=31&t=34992 Follow lilfeggle viewtopic.php?f=31&t=37149 Asbestosis Sux! Don't breath in Asbestos Re: Why do you have to seal your plaster in Perth before pai 10Oct 26, 2010 2:39 am think of this way plaster is like a sponge it is going to absorb anything you put on it when you put a sealer on it you effectively fill the gaps and bind them together(sealer/binder) this allow the top coat to sit on the surface and work its magic I went outside once. The graphics were alright, but the gameplay sucked! Settlement:22nd June Slab:27th August Frame:16th Sept Bricked:21st Oct Roof:24th Nov Linings HANDOVER23rd March! Re: Why do you have to seal your plaster in Perth before pai 11Oct 26, 2010 8:36 am does the sealer also get rid of the spider web effect on the walls too? Follow Feggle viewtopic.php?f=31&t=34992 Follow lilfeggle viewtopic.php?f=31&t=37149 Asbestosis Sux! Don't breath in Asbestos Re: Why do you have to seal your plaster in Perth before pai 12Oct 27, 2010 6:47 am lilfeggle does the sealer also get rid of the spider web effect on the walls too? ???? Pics I went outside once. The graphics were alright, but the gameplay sucked! Settlement:22nd June Slab:27th August Frame:16th Sept Bricked:21st Oct Roof:24th Nov Linings HANDOVER23rd March! Re: Why do you have to seal your plaster in Perth before pai 13Oct 27, 2010 9:29 am when you roll the paint on the walls you can see these hair line cracks than pretty much look like spider webs Follow Feggle viewtopic.php?f=31&t=34992 Follow lilfeggle viewtopic.php?f=31&t=37149 Asbestosis Sux! Don't breath in Asbestos Re: Why do you have to seal your plaster in Perth before pai 14Oct 27, 2010 9:32 am Yeah it does, covers a multitude of sins, cos its oil based and thick and stinks to high heaven! my new build thread- Ben Trager https://forum.homeone.com.au/viewtopic.php?f=31&t=89826 my switch build thread (2011) https://forum.homeone.com.au/viewtopic.php?f=31&t=36569 Re: Why do you have to seal your plaster in Perth before pai 15Oct 27, 2010 10:13 am thanks tinkster - you're awesome ! Follow Feggle viewtopic.php?f=31&t=34992 Follow lilfeggle viewtopic.php?f=31&t=37149 Asbestosis Sux! Don't breath in Asbestos Re: Why do you have to seal your plaster in Perth before pai 16Nov 25, 2010 5:35 pm YES YES YES!!! Make sure you seal the plaster and ceiling (I'm in Perth too). Last week I had a pro come to paint my ceilings and they were flaky in parts. It is because the ceilings were not sealed first but were painted over. It cuts costs for the builders at the time but now I'm paying for it. The paint just will not 'take' to the ceiling. It goes on, then goes like a bubble, then seems to get repelled off. There really is NOTHING effective that can be done for the long term. Short term fixes are a light patching, a light sanding, scraping, sealing whatever.... but the new coat still bubbles and then flakes because underneath it all, it hasn't been sealed and is trying to 'push' the paint off. Re: Why do you have to seal your plaster in Perth before pai 17Nov 25, 2010 7:36 pm thanks for that - we are definatley seal this house Follow Feggle viewtopic.php?f=31&t=34992 Follow lilfeggle viewtopic.php?f=31&t=37149 Asbestosis Sux! Don't breath in Asbestos Re: Why do you have to seal your plaster in Perth before pai 18Dec 09, 2010 8:31 pm Spiderweb cracking is caused by the plaster drying too fast, or excess suction of the undercoat (float coat) due to excessive lime. When you do seal new plaster be careful! If you have the slightest bit of chalkiness (ie the walls aren't rock hard, and glossy) consider using a product suited for these situations, like Dulux Sealer Binder. Otherwise you may have the paint peeling off afterwards. Also, for new plaster, make sure you test for moisture with a moisture meter and don't seal until at least 6 weeks after plastering. Otherwise the sealer can trap moisture, which can weaken the plaster. Re: Why do you have to seal your plaster in Perth before pai 19Dec 09, 2010 10:19 pm dulux sealer binder is pretty good regardless. but oh boy does it pong! Re: Why do you have to seal your plaster in Perth before pai 20Dec 10, 2010 8:37 pm thanks everyone for your answers - coming from the east you just slap it on the gyprock the first house we built we just used oil based paint for the whole house - but with this one, we'll do it right, no cutting corners Follow Feggle viewtopic.php?f=31&t=34992 Follow lilfeggle viewtopic.php?f=31&t=37149 Asbestosis Sux! Don't breath in Asbestos Hi All, I just wanted to close this topic out with an update. So we ended up agreeing to a number with the insurance company, and after an extensive amount of hand… 8 23394 I need to replace the worn mohair seal on my sliding window, but I can't get access to the end to slide the old one out & push the new one in. I could probably rip the old… 0 5184 4 14277 |