sealing fibreglass

[clayton1985]

hi guys i have mentioned this on another thread but dont seem to be getting many responces. i im building a plywood tank and am ok up to sealing the fibre glass. iv seen mentions for sweetwater and other products but i live in the uk and would like to avoid shipping so i can get the build done as soon as possible. do you know any products available in the Uk that will do this..thanks