Micro for Lime plaster overskim

[Rossi46]

As per the title. I've been knocking off Lime haired mortar in a couple of large rooms and some of it is nice and firm so doesn't need knocking off. I'll be replacing like for like but when it comes to where the lime plaster will go over the original would Micro do as a bonding agent to key the walls?

Thanks

 

[FreeD]

Probably I've used blue grit before without problems.

 

[jamesthefirst]

Water it down a bit @Rossi46 or get some stabiliser on first. The micro holds the suction back great.

 

[S a plastering]

think they recommend sbr for going over any lime might be wrong though

 

[stuy]

No micro wont do it afraid, you'll have to put on dg27 from baumit its a silicate based permeable consolidation primer thats gives good adhesion properties on the old lime , but its still permeable , so the plaster can still breathe, hope this helps stu

 

[Rossi46]

No micro wont do it afraid, you'll have to put on dg27 from baumit its a silicate based permeable consolidation primer thats gives good adhesion properties on the old lime , but its still permeable , so the plaster can still breathe, hope this helps stu

Thanks @stuy

 

[user__removed]

Pretty sure micro is still breathable.
Dg27 is a rip off and not that great.

 

[Rossi46]

Pretty sure micro is still breathable.
Dg27 is a rip off and not that great.

I thought so too.

 

[jamesthefirst]

Sorry Rossi i may have got that wrong as you are using lime to re skim with?
DG27 is good stuff just like using micro or betakontakt but white.

 

[Rossi46]

Sorry Rossi i may have got that wrong as you are using lime to re skim with?
DG27 is good stuff just like using micro or betakontakt but white.

No worries James. Using Mike Wye for the plaster and he sells DG27 so seems like that's the stuff to go for

 

[jamesthefirst]

What did you use in the end @Rossi46 ?

 

[Rossi46]

What did you use in the end @Rossi46 ?

I bought DG27 to be on the safe side. Micro is most likely fine but wasn't 100% sure.

 

[Hockey100]

Can dg27 go on top of brick? I am scraping the wall back to the old lime plaster but done spots went back to brick. Can I use dg27 for them??

 

[jamesthefirst]

Can dg27 go on top of brick? I am scraping the wall back to the old lime plaster but done spots went back to brick. Can I use dg27 for them??

Yes, make sure wall brushed down and water down dg27 a little.

 

[Hockey100]

Thank you!!