self levelling bubbles

[sWe]

Another reason for bubbles forming is mixing the SLC at too high RPM.

 

[Gazzer]

Another reason for bubbles forming is mixing the SLC at too high RPM.

I was just about to say that. Its a common thing i see when tilers have a mixer," just put it on full speed and go for it".
When mixing latex leveller or water based follow the instructions. If its Latex then one unit of Latex to One unit of powder, mix well but not too fast as this will add air to the mix and (i believe) warm the mix up, which is not ideal.
With water based mix, add the correct amount of water as specified by the manufacturer.
Try other brands and types of levelling compound and you will find one that will suit you. I recommend the Mapei range and yes i have tried a lot of others.

 

[BDS]

BAL`S acrybase can be used up to 10mm,where as multibase is only 5mm.i`m with the guys on the mixing speed regarding bubbles..i need to purchase a spiked roller too.

 

[kaharrison9]

Do take on board about drill speed and did look at the Bal acrybase but was quite more exspensive than the multibase.
Have now got a product list on Mapei products since buying the multibase and the Mapei ultraplan or ultraplan maxi looks like it would have been ideal.
Would it be okay to use a Mapei slc over the Bal multibase slc and if so would it be compatable with the Bal primer i've already used?
Thanks for your help
Kev

 

[woodie]

hi mate 'bubbles' come from the substrate being dry, before laying slc dampen the floor first 'not wet damp' and then you shouldn't get any if not as many bubbles :santa_cheesy:

 

[sWe]

hi mate 'bubbles' come from the substrate being dry, before laying slc dampen the floor first 'not wet damp' and then you shouldn't get any if not as many bubbles :santa_cheesy:

Some SLCs, especially rapidly curing ones, do not react well to the substrate being damp. It's best to simply follow the manufacturers instructions, but as a general rule, it's doesn't hurt to prime.

 

[DHTiling]

I actually thought that the bubbles were caused by air entrapment when mixing...

Woodie can you elaborate more on your theory please...

 

[woodie]

i was informed that the slc obviously dampens the concrete causing it to release air that is trapped in its surface so by dampening the floor first you release this into the air instead of into the slc:santa_cheesy: i didn't dampen the floor when i first laid the stuff hence i had air bubbles everywhere since then i don't get any trouble

 

[div]

1st ive heard about dampening floor proir 2 layin slc..!!!!:santa_cheesy:
bubbles usually appear because off mixing at high rpm ...:rant:

 

[woodie]

considering my mixer is called my arm i can't see that:santa_cheesy: