It absolutely should have a liquiseal on the bottle neck :
If it does not then it has been removed prior to your purchase ( unlikely ) or was defective in manufacture.
I have checked and we have no QC's outstanding for this fault. I would not suggest returning it to the shop in case you spill some, I would also suggest that you do not use the product, PM me your address and I will arrange to have it replaced free of charge. Please be kind enough to PM me the batch number from the bottle so as I can start our internal work.
Sorry you have had a problem with an ILFORD Photo product.
Simon. ILFORD Photo / HARMAN technology Limited