render stabilising primer

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never used it!........ kinda like plasprime x??? Or micro?
 
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I am a self employed builder for nearly 30 years and have seen many problems with rendering.
i recently used this stuff on a garage conversion.The block work was dry and had been power washed off and left to dry a few days before we put this stuff on.
my plasterer said he was busy on a job, so I left it untill the spread could come and scratch it.A week after we applied it and it had dried, it started to rain, and the renderers stabelizing primer went from dark grey to a light grey.I thought it a bit strange, so I went up and rubbed my hand over it and noticed that the primer had gone soft and rubber like and could be scratched off with my finger nail.
i will get it grit blasted and apply SBR mixed 2parts OPC to 1part SBR and apply render while slurry is still wet , as I have used SBR like this before and I know it works for sure, providing the render is applied while SBR is still wett and not left to go tacky.
this new renderers stabelizing primer is a very new product and I don't think it will last long.Any product that breaks down with water in any way shape or form can't be any good for external rendering IMO.
This stuff is cr@p if you ask me.
ps, we have used SBR in our top coats of render and find it helps prevent cracking.
one coffee mug of it to a barrow sized mixer is what we throw in.My spread is a very good plasterer from Bristol and likes it in the mix.He says its nice to rub up.
i would like to hear from anyone who has used this renderers stabelizing primer for outside rendering to hear what they think of it.
Norman. NB Builders
 
Antiquebuyer321 said:
I am a self employed builder for nearly 30 years and have seen many problems with rendering.
i recently used this stuff on a garage conversion.The block work was dry and had been power washed off and left to dry a few days before we put this stuff on.
my plasterer said he was busy on a job, so I left it untill the spread could come and scratch it.A week after we applied it and it had dried, it started to rain, and the renderers stabelizing primer went from dark grey to a light grey.I thought it a bit strange, so I went up and rubbed my hand over it and noticed that the primer had gone soft and rubber like and could be scratched off with my finger nail.
i will get it grit blasted and apply SBR mixed 2parts OPC to 1part SBR and apply render while slurry is still wet , as I have used SBR like this before and I know it works for sure, providing the render is applied while SBR is still wett and not left to go tacky.
this new renderers stabelizing primer is a very new product and I don't think it will last long.Any product that breaks down with water in any way shape or form can't be any good for external rendering IMO.
This stuff is cr@p if you ask me.
ps, we have used SBR in our top coats of render and find it helps prevent cracking.
one coffee mug of it to a barrow sized mixer is what we throw in.My spread is a very good plasterer from Bristol and likes it in the mix.He says its nice to rub up.
i would like to hear from anyone who has used this renderers stabelizing primer for outside rendering to hear what they think of it.
Norman. NB Builders
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This is is why I would like to know how it works? A dry film and wet render is expected to stick to it like sh!t to a blanket? I suspect that when the wet render is in contact with the dry film the film knocks back up to a wet state again and that is when it bonds?

An expensive way of doing it over sbr wet but even that comes under the faffing about category. When I have used it, it is more for convenience but then if you have subbies you have to trust that they are putting the sbr slurry on mixed to a right consistency and applying the render on whilst still wet. This stuff is pre mixed and you can see if it has enough applied. So it may be safer to use than trusting out of sight workers to sbr the wall in question. Only time will tell if this plastPrimeX and it,s competitors works.
 
Used this type of stuff in Spain and it did state on the container that it had to be covered within so many hours of application, cant remember how long exactly now.
 
Rigsby said:
This is is why I would like to know how it works? A dry film and wet render is expected to stick to it like sh!t to a blanket? I suspect that when the wet render is in contact with the dry film the film knocks back up to a wet state again and that is when it bonds?

An expensive way of doing it over sbr wet but even that comes under the faffing about category. When I have used it, it is more for convenience but then if you have subbies you have to trust that they are putting the sbr slurry on mixed to a right consistency and applying the render on whilst still wet. This stuff is pre mixed and you can see if it has enough applied. So it may be safer to use than trusting out of sight workers to sbr the wall in question. Only time will tell if this plastPrimeX and it,s competitors works.
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Hi Rigsby. I know what you mean About trusting people. I used this renderers primer cause I thought that I could bang it on a few days before and my spread could just do his stuff without us having to brush on the SBR slurry and it would be better for him.
Everything comes at a cost, and I will stick to the SBR slurry as I know it works,even though it is a more labour intensive way. I'm a great believer that an extra 2hours today could save me another 2weeks in the future.
i had the grit blaster up today to blast off all that crap off the front of my walls, and it was like elastic, and I kid you not.
I have never used external PVA with cement dust etc, but would like to try it some day.
do any of you boys recommend using it and what mix to do.
Should it be put on with a splatter box or scudded.Do you have to damp the wall down or put it on a dry surface? I know that the surface should be damped down if you are using SBR slurry, but I'm not sure about the PVA slurry/splatter.
Pva can't be that bad as its been used for many years.
Hope all you boys have a good Christmas and New Year.
Normski
 
If you are going to use Pva outside make sure it is the waterproof version. Saying that in did a one coat of waterproofed render with a spar dash on painted brickwork for a tight arsed property developer back in September 1987 and it is still there today.

Hacked a few off that was done in the 70's 2 coats on the existing old render so it may be down to good luck. There is a competitor close to me who still pva,s over the old and uses 50/50 plastering and building sand. I have seen 1 of his jobs fail.
 
cassie said:
get some Weber Rendaid...
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As above. Or rendergrip,microgig or similar.
The cost is slightly higher but a better product than any pva/sbr.
It's the year 2013 not 1985.use the best products out there available


I'm using The Plasterers Forum Mobile App
 
in 1985 id been labouring for two years on site (no hi viz ) (or **** )and just starting to put on the bit under the stairs and the back wall in a small cupboard, if only then at that moment i would of known there was a product that would change my world so much in years to come .
 
This reminds me of when I was an apprentice in 72. I was questioning how thistle board finish stuck to paper on plaster boards. The old spreads told me when they first come on the market in the 50's I think plasterers laughed at the idea of plaster sticking to paper? At first it was slow to get the market to accept change but once it was seen to work there was no going back to laths.

In the domestic market though and rendering customers still insist in the old ways. Hack off to brick. We on here might be clued up on the latest technology but selling it Joe Public is not that easy especially when the competitor I mentioned below is undercutting with his old ways and working off towers. There is another in my City who only works off ladders. He does more block paving these days since his dad retired. But why struggle off ladders to save punters money and knacker your knees in the process?

It,s time rendering was governed by some code of practice like Fensa has control of the window replacement market.
 
I totally agree with you Rigsby for years our trade has gone backwards where others has pushed on , ok new products and a few new tools come on the market , but there useless if you are not turning over a profit out of them . How many builders are going to let use and supply a bonding agent , where you are making 20- 30% profit on it !!!!! which if you are running a business you should be . As ive said before the plastering trade is a joke trade even british gypsum now put instructions on how to use plaster on there bags WTF is that about lol , and as the above post said what chance have we got against trade rendering off ladders !!!! Two years ago a lad re rendered a house near me , over the top of old render a few disc cuts and pva for key, beads stuck on with plaster , two coats with building sand , £2000 all in , now same lad drives around with rendering specialist all over his van.
 
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