Mastic,myths and legends. (1 Viewer)

[Gorsecover59]

Hi,
I want to re-seal my outside toilet locker door but am absolutely discombobulated over what to use.
There are as many advocates of using a non setting mastic as there are over using a bonding on.
Non setters say you may want to remove the componenet in the future. The only reason I am removing to re mastic is that it has broken down. So does this not point to using a bonding sealant that does not break down.
Confused beyond belief.
Cheers
Martin

 

[Silver-Fox]

IMHO just use Sikaflex best of both worlds and job done

 

[Badknee]

For my fridge vents I bought mastic on a roll. You can buy it on eBay in various thicknesses and width. I used 3x22mm.

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[Geo]

You can discuss as many myths and legends as you wish, it wont change what is the correct material for the job
hard setting bonds, will over time crack through movement and vibration (it is a vehicle on the move after all)
none setting sealants handle vibration and movement very well as they are designed to do and incorporate a degree of self healing
ps Never say never

 

[Popeye]

You can discuss as many myths and legends as you wish, it wont change what is the correct material for the job

Bang on!

 

[tonyidle]

Strip butyl mastic as suggested above will not set and will allow for removal later if needed. I've removed the stuff after 10 years use and seen zero deterioration - if the 'edges' hadn't got dirty it could have been re-used. It's easy to apply and is very sticky adding to the integrity of the mounting as well as sealing. PU adhesive (the commonly discussed variety of Sikaflex) cannot be removed by solvents and is near impossible to clean off. It is brilliant stuff for its intended purpose but totally unnecessary where all that is required is a sealant.

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