granfix self--priming addy

[diamondtiling]

This is rubbish addy, know 2 people who have had tiles fall onto their heads with this stuff!!! and me!!! when they complained the company side that it should only be applied where the depth of addy should not exceed 3mm! or it takes weeks to 'go off'. i now use the bal pda primer as a matter of course.

As a tilersforum member you can get better prices at Tilegiant for your primers and adhesives.

 

[Gazzer]

This is rubbish addy, know 2 people who have had tiles fall onto their heads with this stuff!!! and me!!! when they complained the company side that it should only be applied where the depth of addy should not exceed 3mm! or it takes weeks to 'go off'. i now use the bal pda primer as a matter of course.

Isnt that a "personal digital assistant " or do you mean APD ? :lol:

 

[Ajax123]

Bal giving away PDA's now then - I only got a pen when I went......

 

[A.J.B.E.G.B]

I Know Kerakol do some bagged addys that say they don't need a primer but they are not really self priming. Benfer also do one for anhydrites that say no primer needed. Forbo used to but it never worked so they withdrew it - or so I am told

Arnt these addy's gypsum based adhesives, not cement based and therefore primers arnt needed. Obviously if the wall / floor are over dusty then it will need priming

I never use primers with tubbed addy anyway unless the walls are dusty, then again i never use tubbed gear so it irrelevant

 

[A.J.B.E.G.B]

I have used Granfix standard set white addy for ceramics on the walls and the tiles were coming loose in my hand! Id never use Granfix again

 

[Ajax123]

The ones I am talking about are not actually gyspsum based. They are cement based but are made using sulphate resistant technology so they say can be used without primers on wither cement or on gyspum substrates. They quite confident but I not seen them used yet without primers and generally would not recomend any bagged adhesive without a primer myself....

I agree that if the surface is at all unstable then a penetrating primer to stabilise the surface is a good idea. In these cases I would generally recomend Epoxy myself but I know the addy manufacturers say acrylic.

 

[Sean fsy]

The nearest tilegiant to me is 115 miles away!! i mean apd😳

 

[Thespanishtiler]

have used Benfergyps on anhydrite and did not use a primer, the floor was vacumed and mopped to remove dust.

 

[Ajax123]

have used Benfergyps on anhydrite and did not use a primer, the floor was vacumed and mopped to remove dust.

Useful to know. I assume from t=your comments no issues with the installation. I have recomended Benfergyps in the past but it has proved difficult to get hold of generally.

 

[Thespanishtiler]

benfergyps is available localy and in stock, last job was a 5 year old newbuild and was not sure of the subtrate so used it, on other jobs i have been told the subtrate was anhydrite, would guess about 200m2 in last couple of years with no issues, used it once to lay dural ci but then used c2 above for the limestone.