how much sbr

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How much sbr do you normaly put in a sratch coat externally per gauge and if u was doing a 6 1 1 top coat would you put it in that?
 
mix it 4/1 for the scratch. i wouldnt put any in the top coat.................anyway you should be telling us cos your the Master.......................:RpS_thumbup:
 
just curious i was working with a pal today and he used it in top coat felt nice to use and floated nice
 
3 litres to the scratch coat and 2 litres to the top coat. No other admixtures.

Supposed to be waterproof but I often get a bit of suction. Nice gear though.
 
iv never used sbr in render mixes, its dear as fook and many other types of water proofer out there. i worked with a spread on this job once and he was chucking it in the scratch and top..... over painted brickwork that he had also sbr ed lol i was like, where the hell is the suction gunna come from here then?? not to my surprise half of the top coat hit the floor after a few hours of being put on as there was fk all to suck into. top heavy and boom, on the floor lol
 
Sbr is a fantastic additive when used correctly, there is some info already on this if you do a search, inc modifying renders
 
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just as a product i find it way costly for what it does, i use cementone freeflow.2 cap fulls in each mix and the tub lasts for ever, 3 in one product, waterproofs, re***ds and plasticises and its ace!
 
lizard821000 said:
just as a product i find it way costly for what it does, i use cementone freeflow.2 cap fulls in each mix and the tub lasts for ever, 3 in one product, waterproofs, re***ds and plasticises and its ace!
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And what fantastic adhesive qualities Freeflow has, who needs SBR.
 
what do you need adhesive qualities for!? long as the background has key or aint painted brick etc then i wont use it, waste of time,money and messy.
 
lizard821000 said:
iv never used sbr in render mixes, its dear as fook and many other types of water proofer out there. i worked with a spread on this job once and he was chucking it in the scratch and top..... over painted brickwork that he had also sbr ed lol i was like, where the hell is the suction gunna come from here then?? not to my surprise half of the top coat hit the floor after a few hours of being put on as there was fk all to suck into. top heavy and boom, on the floor lol
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You can use this stuff to render over paint. But you should mix it to a paste with cement and brush it on to make a cement slurry.
this can the be rendered on.
As far as using as an add mix - no thanks. Makes the mix heavy and sticky. Hard to keep mixer clean and makes the render dry too quick!!
I prefer Free flow or Sika one shot!
 
only when tacky, or its like tanking no.

im with you anyways, never in mix, i use free flow for years with no problems or come backs.. 1 or 2 shots in EACH mix.... 4.1 scratch.
 
lizard821000 said:
only when tacky, or its like tanking no.

im with you anyways, never in mix, i use free flow for years with no problems or come backs.. 1 or 2 shots in EACH mix.... 4.1 scratch.
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Oh Yes!.
I do two coats. one I let dry and the second I go over when tacky. Any longer and yes It's like going over tanking.
Makes life difficult when on a large area!!!! :RpS_cursing:
 
SBR is expensive but so is coming back when it goes boxy, 2 litres is ok for scratching, its a bugger to render on after but maybe you should do 1 scratch in sbr and another without sbr then top coat ?
 
each to their own, i dont and have never really used it, not needed imo. iv used it a fair bit on prep for backgrounds, but not in the mix.
 
:RpS_thumbup:last time i used sbr on smooth brick. it was brushed
on like a slurry paste by labourers. and while tacky.
just turning dark blue. i would apply the scratch
coat a usual 4-1mix with waterproofer.
messy old stuff. still got old jackets with sbr on.
thats why got labourer to do it!
 
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