solar fountain in a container

our grandson has been given a solar fountain and wants to put it on our patio,but with toddlers about we don't want a pool.We have a lovely large earthenware container that would do,but it's porous inside.The question is,what can we seal it with to make it water tight that won't be detrimental to plants should we use it for that later on.Any advice would be welcome. :rolleyes:

 

I've been googling for an answer, and haven't come up with one yet - but this site looked interesting as a "diy water feature in a container" site. In the meantime, I'll keep an eye open! Good luck!

 

http://www.hgtv.com/hgtv/gl_design_water_features/article/0,1785,HGTV_3575_2970656,00.html

Oops, I'm always doing that - forgetting to put in the very thing I'm talking about - sorry!

 

this might just do the job - PAINTABLE SILICONESize 310ml


SILIRUB A high quality neutral curing silicone which can be painted after 24 hours with most synthetic paints as well as water-based paints.
Tests are recommended.

- very easy application
- permanent colours, UV-resistant,
- stays permanently elastic after curing
- very good adhesion on many materials
- specially developed for applications when the sealant must be painted
with paints based on alkyd resins
- can be tooled without soapy solution

For more information view our 'Technical Data Sheet'
You will need adobe acrobat reader to view this file
Click picture to download

for website -
http://www.absealantsltd.com/sealants.htm#Paintable%20Silicone

 

Or fibreglass resin (Halfords). I fixed a rusty and leaking rear axle on an old Land Rover by painting it on. It withstood hot oil so should be ok with water.

 

A two pack "West System" epoxy resin would do it too.
It can be used to waterproof plywood aquariums, so it`s safe for fish and plants.
Most fibreglass stockists would have it and probably boatyards.