Primer for screed...I'm lost!

jenniewb

I need to screed a small space (an inbuilt cupboard, floor space is 40 cm by 100 cm).

Apparently I need a primer to cover the current uneven and cracked concrete first.
I have asked in B&Q but didn't get anywhere- they didn't seem to know what screed was.....not a good sign I have a wicks near me but they don't have anything suitable (they've said).

I could order from Amazon but don't really know what I am looking for and need to get this right- I've already bought the wrong thing once already.
Products I find are either huge in volume (industrial sized) so expensive (£25+) or seem aimed at different surfaces than what I have.


If anyone has any suggestions I'd be really greatful, I'm getting a bit lost by what a Google search throws up.

Davesnave

I would use SBR, although if the floor is dry, PVA would probably be fine and half the price.

Bigphil1474

I did a small area in my kitchen - cleaned up loose debris etc. painted some watered down PVA over the top, let it dry, then chucked the screed on. Worked fine. You could be a bit more scientific as opposed to my slap dash approach.

Furts

Much like above, though after priming I would paint a coat of pva on the surface, then put the screed down whilst this was still wet. It may not be scientific method, but a common problem is a screed lifts away from a floor. This way it is not going to do so.

Most pva comes in 5 litre containers but smaller pots are available. Get the 5 litre if you think there will be more diy during the shelf life. Plus if you keep it away from frost, and keep it cool, it seems to last a bit longer than the shelf life given on the containers.

Kiran

What's the depth of the screed you need to patch? Any of the options above will work, SBR being the belt and braces option and PVA being the economical option. The important thing to get right is the preparation, knock off any loose edges and hover out all the dust prior to using whichever primer option you go for and screeding