Marble with brown stains

[Colour Republic]

that's what i thought, thanks Dave

 

[Terry Cottar]

hmmm I thought i had read somewhere that sealing the underside and sides actually assisted adhesion

why wouldn't you seal a damp tile with a sealer as long as it was water based and breathable?

tel

 

[White Room]

hmmm I thought i had read somewhere that sealing the underside and sides actually assisted adhesion

why wouldn't you seal a damp tile with a sealer as long as it was water based and breathable?

tel

I'm sure I did as well quite a while ago though

 

[DHTiling]

hmmm I thought i had read somewhere that sealing the underside and sides actually assisted adhesion

why wouldn't you seal a damp tile with a sealer as long as it was water based and breathable?

tel

I remember the thread as well but more peeps were against the idea than for it...

It's not something i woul do personally but if you feel it is advisable then thats your choice..i cannot see any benefit of sealing the under side of a tile IMO..
Adhesive griups into the capilaries of the tile so sealing them will hinder as far as i'm concerned...a bit like sealing unfilled travertine before grouting then the grout pops out where it can't grip the sealer....

As for sealing a wet tile with water based sealer...the water is the carrier not the sealer...but i don't use water based anyway...have you any product data for a water based sealer that can be used on wet tiles..apart from these aerosol diy stuff thats about..?

 

[enduro]

Aqua mix water based sealer says you need to wait 48hrs after grouting to apply sealer. So even using waterbased sealers you have to wait.

 

[Terry Cottar]

Aqua mix water based sealer says you need to wait 48hrs after grouting to apply sealer. So even using waterbased sealers you have to wait.

true but it also says you can apply as soon as the surface is dry. i have applied gallons of the stuff to damp tiles and never had a problem as long as the surface of the tile is dry it works for me. however it does not become effective until the tile is total dry

tel

 

[Colour Republic]

The product I had in mind when I asked the question was Lithofin Stain Stop (the water based version of course).

Thinking about it now, If you paint over plaster that has a few damp areas with a water based paint like a vinyl matt emulsion if reacts differently and is clearly visable where it doesn't soak into the plaster but rather sits on the top. You would think that it might just be slightly diluted in that area but becuase the area is already damp the product is not drawn in to the surface so it does not bond as well - I suppose the same could be said for a sealer

 

[R Montgomery]

..........

 

[Terry Cottar]

The product I had in mind when I asked the question was Lithofin Stain Stop (the water based version of course).

Thinking about it now, If you paint over plaster that has a few damp areas with a water based paint like a vinyl matt emulsion if reacts differently and is clearly visable where it doesn't soak into the plaster but rather sits on the top. You would think that it might just be slightly diluted in that area but becuase the area is already damp the product is not drawn in to the surface so it does not bond as well - I suppose the same could be said for a sealer

Well pointed out and have no idea about Lithofin as i hate the stuff I would agree in that instance but this aquamix sealer is breathable and allows vapour transmission so thats why its Ok once the surface is dry

tel

 

[jay]

breathable ,does that mean it allows air to pass through but not moisture , id reko leave 48 hours as above :8:

 

[Terry Cottar]

breathable ,does that mean it allows air to pass through but not moisture , id reko leave 48 hours as above :8:

No it means it allows vapour transmission as well as most of the water evaporates anyway. noone said you shouldnt leave it for the 48 hours but sometimes circumstances dictate you cant

tel

 

[jay]

if you seal with water based sealer on to damp stone slate ect chances are sealer will be broken down (non effective )i know sometimes you need to speed jobs along but you run a risk of problems later cloudy effect or grout sticking only my opinion be carful:8: