QUOTE(jojozep @ Dec 14 2012, 11:39 AM)
WHY use Sika or Sika Cement(($75/bag) ? Can use White cement ($25/bag) ? It is used as grout filler for bathroom, so can stand water splash...
I used it for the concrete slab roof and wall last week, no leak, this week when it is raining.
Anyone in construction can comment?
good luck to you! Sika product is not manufactured for show only.
Added on December 14, 2012, 4:44 pm
if you guys want a good product use Sika-TOP 107. This is a 2-part product - cement mixture and latex (susu). mix the true properly and brush one layer in one direction and leave it to dry overnight. next day apply another layer (this time perpendicular to the direction you applied yesterday). after that you can apply one layer of cement screed to protect this waterproof membrane.
if you cannot get sika-top, look for sika brushcoat. apply using same method. sika brushcoat is cheaper at RM60 per bag with susu.
this is what contractors use to waterproof concrete roof slabs and toilets. only that they will sometime apply only one layer to save cost.
if you use cement only, it will still leak ... just a matter of time. white cement is the worst .. it is porous.
Another thing ... if the crack is not stable, then you have a big problem. could be a problem with your house extension foundation or something similar. no matter what you do, if the crack is getting bigger, you will still get a leak after sometime.
Good luck!This post has been edited by lionfish77: Dec 14 2012, 04:44 PM