Just spoke to resiblock they have quoted that I need 100lt of product at a cost of £876 inc vat and delivery
Not going ahead with the clean, they are a adement they want it sealing , and to be truthful I think they are being crafty as I gave a suggested price and around £600 extra to seal it, which I know now is way off.
I think they have had a price before so knew my price was way too low but hoped I would stick to my estimate and they would get it sealed on the cheap.