Mastic asphalt primer- can it be used to prime brickwork for painting?

[joefuller]

Hi all,

I've got a brick corridor leading to the garage that I want to paint white. This will be demolished in a few years so don't want to invest too much in it.

I also have a full 20l bucket of 'Cromarty building products Hi-bond primer' left by the roofers when they felted over an ashphalt roof. On what's left of the label it says 'Emulsion based primer used to treat surfaces prior to laying mastic ashphalt'.

Can this be used to prime the brick before painting with a masonry emulsion?

Thanks

 

[Wayners]

Read the application date sheet for products and see what it says about painting.
Might say yes. Might say no.
If it don't mention painting then it's a no..

 

[joefuller]

Little update- I tried it on a bit of identical brickwork in a lean to shed. The patch on the left has the primer (you can see at the bottom) and then paint and on the right its just paint straight into the brick. The paint is one coat of bog standard magnolia emulsion and there's basically no difference between the two!

I think I'll just paint straight onto the brick and sell the 20l of primer on ebay. The corridor to be painted is being demolished in a couple of years anyway so it just needs to look a bit better not be perfect.