Primer for when painting window sills ?

vicwatson

Just wondering if i need a primer to put on windowsills, if so what one ? they were painted naked with emulsion and are in need of a good job done now.

Is there a primer that i can put on now after they've been sanded and cleaned which will stop the paint washing away and flaking ?

I was going to use white emulsion again but would be prepared to use gloss paint as a topcoat if i thought it would stop them looking filthy and old so quick.

Any advice would be appreciated.

vicwatson

Jaysus, where are ya when I need you eh !!:p

One shot on kill

Would you not trying using an undercoat and the maybe satin wood as. Finish emulsion isn't the ans it's the problem.

In my opinion

vicwatson

One shot on kill wrote: »

Would you not trying using an undercoat and the maybe satin wood as. Finish emulsion isn't the ans it's the problem.

In my opinion

Cheers. like an oil based emulsion ?

ronan45

step away from the paint brush, paddy147 will be here soon:D

vicwatson

ronan45 wrote: »

step away from the paint brush, paddy147 will be here soon:D

Am going with the undercoat and see....

galwaydude18

ronan45 wrote: »

step away from the paint brush, paddy147 will be here soon:D

Lol

jack of all

I think you need to use an alkali resisting primer like sealapore from Dulux. When regular waterbased paints are applied to concrete it can blister, lift and flake over time due to the presence of alkalis (cement basically) in the concrete. Water causes the alkalis to leach through and consequently destroys the paint finish. You would need to scrape back as much of the loose paint as possible before priming. Once primes you should be good to go with any paint of your choice. I've used Sealapore on exposed concrete and render (plinths and cills) and no problems with paint lifting.

leeomurchu

uni bond mixed with the paint is usually the job but I'm not sure how well that'll go considering you're bonding it to the paint that's already on it and flaking unless you're planning on taking it all off :eek:

vicwatson

Thanks y'all.

I scraped and sanded back to as much as I could.

There was only ever emulsion put on straight to the concrete cill therein lies the problem.

I've put an undercoat (oil based) on now and will top coat it tomorrow (probably gloss), hopefully that does the trick. Cheers