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Ask a questionBricklaying & Repointing
Sealing before rendering
Anonymous user 18/02/2024 - 2.30 PM
I have a dusty flakey cement surface on a wall that I want to repair the render on. What type of sealant / bonding agent will secure the dusty surface and then allow render to adhere to it ? Once the render is repaired I will paint with external masonary paint.
Are you a tradesperson and able to answer this question?
4 Answers
Anonymous user
Normally I use of product from MAPEI brand. I don't understand exactly what you need to do,but for sure for work you need to do you found exact product from this brand ( in my knowledge is the best brand)
Answered17 October 2023
5
Brick & Stonework Services
Rating: 5 out of 5
Paint on 4:1 ( 4 parts water 1 part PVA ) on to the old render/wall, clean area with a wire brush first, if the render is needing repairs
( sounds hollow when you tap it) cut out the old render and re-render.
Pj
Answered17 October 2023
0
Bob Fice Builder
Rating: 5 out of 5
I would make sure all loose render has come off first. Apply a SBR slurry & let to dry. Then apply 2nd coat of SBR & apply render when the SBR is tacky. Don't worry if you see a blue colour when applying SBR as it goes clear.
Answered28 October 2023
0
