Random Thought About Primer

[Dougs Third Go]

Most adhesive manufacturers express the need to prime all surfaces (in varying dilution ratios)...so how come we don't prime the backs of tiles? Just a random "thought of the day"

 

[Mr Tiler]

Too early mate, too early

 

[Qwerty]

I guess because most tile manufacturers recommend you wipe back of tiles with a damp cloth or sponge to remove dust? Like the randomness though

 

[J Sid]

I would have thought it's because the adhesive manufacturers have manufactured there adhesive to bond to different tile materials.
A general purpose adhesive for ceramic.
A porcelain adhesive and one for stone.

This gives three adhesive, each with one bottle of primer to suit and jobs.

I am sure they could make an adhesive to suit all applications, stone onto screed, ceramic onto plaster, porcelain onto cement board. This would mean 10's of different bags need to be stock by each shop for each adhesive manufacturer, not practical.

May be wrong, but does bal's white star tubed adhesive not have a primer built-in so not need to prime walls? Don't use it, but thought I read once it was a new formula?

 

[Old Mod]

May be wrong, but does bal's white star tubed adhesive not have a primer built-in so not need to prime walls? Don't use it, but thought I read once it was a new formula?

That's funny, cos ur the second person to say that in as many days Julian!

 

[J Sid]

That's funny, cos ur the second person to say that in as many days Julian!

Say what? "maybe wrong" or. Something else

 

[Old Mod]

Say what? "maybe wrong" or. Something else

Haha sorry chap,
Yeah spose it'd help.
That adhesive had a primer already in it!

 

[J Sid]

Haha sorry chap,
Yeah spose it'd help.
That adhesive had a primer already in it!

I know they did one which didn't need a primer a few years back, looks like they don't do one now. Maybe didn't work as it should!

 

[Tile Shop]

Most readymixed adhesive are acryllic based. It would be wrong to use the term "self priming", but it is the acryllic that forms the bond to the substrate once the water content had dispersed. Hence why they will stick to most porous wall surfaces.

Alot of cement based adhesives are polymer-modified, which means they can have additional rubberised bonding agents for impervious substrates or tiles, and to add the flexibility. But again, it won't prime a surface.

If it did, you could use it direct on gypsum, but we all know that doesn't work (unless a seperate acryllic primer is used first!). The built in polymers enhance the physical properties, but won't form the barrier needed between the cement and the Gypsum to prevent the chemical reaction and crystallisation.

Thanks BAL for helping me look knowledgable

 

[Spare Tool]

I never ever primed my trowels or buckets or workpants or fingers so how come I got Webber spf stuck like #### to a blanket all over em..