Grab adhesive

tony3619

Hello 

Before using any kind of grab adhesive (no more nails, gripfill etc) on painted plasterboard do I have remove the paint?

I'm assuming this will give it a better hold as otherwise I'm just gluing to a layer of (rubbish) paint?  

grumbler

I think, yes, but this would never be my preferred way of fixing.

ObserverOfLife

If you don't want to remove the paint, you should at least attempt to sand it and make cross texture (use a flat head screwdriver to scrape a cross multiple times across the area) to make it rough then the grab adhesive will keep hold better. 

If you want to do the job properly, I'd scrape the paint off back to base.

Edit: *Properly 

tony3619

ObserverOfLife said:

If you don't want to remove the paint, you should at least attempt to sand it and make cross texture (use a flat head screwdriver to scrape a cross multiple times across the area) to make it rough then the grab adhesive will keep hold better. 

If you want to do the job property, I'd scrape the paint off back to base. 

It seems like a cheap paint that builders use in new builds so it comes off just by rubbing so I was going to just sand it down before and make sure no dust remains. I've heard alot of the failures of grab adhesives is the paint peeling off. 

Gavin83

What are you gluing?

NSG666

tony3619 said:

ObserverOfLife said:

If you don't want to remove the paint, you should at least attempt to sand it and make cross texture (use a flat head screwdriver to scrape a cross multiple times across the area) to make it rough then the grab adhesive will keep hold better. 

If you want to do the job property, I'd scrape the paint off back to base. 

It seems like a cheap paint that builders use in new builds so it comes off just by rubbing so I was going to just sand it down before and make sure no dust remains. I've heard alot of the failures of grab adhesives is the paint peeling off. 

That sounds like contract paint so you might find that you can wash it off. If it rubs / washes off rather than peels off then you might be better going over the contact area with a wash of diluted pva to seal it - I fitted a load of skirting recently with contact adhesive but some of it popped and I realised it was where the substrate was porous.

tony3619

NSG666 said:

tony3619 said:

ObserverOfLife said:

If you don't want to remove the paint, you should at least attempt to sand it and make cross texture (use a flat head screwdriver to scrape a cross multiple times across the area) to make it rough then the grab adhesive will keep hold better. 

If you want to do the job property, I'd scrape the paint off back to base. 

It seems like a cheap paint that builders use in new builds so it comes off just by rubbing so I was going to just sand it down before and make sure no dust remains. I've heard alot of the failures of grab adhesives is the paint peeling off. 

That sounds like contract paint so you might find that you can wash it off. If it rubs / washes off rather than peels off then you might be better going over the contact area with a wash of diluted pva to seal it - I fitted a load of skirting recently with contact adhesive but some of it popped and I realised it was where the substrate was porous.

Yes it's definitely contract paint and is removed after abit of rubbing. 

 Do you know when no more nails is at full strength? It says usable after 12 hours but fully dry after 24? 

I'm assuming after 24-48 hours it's much stronger?