2 Dr Sludge Self Sealing Mountain Bike Inner Tube 26" puncture repair Schrader

Purchased two tubes ! One inflated but leaked through the valve! The other would only let me inflate to 5lb psi! I am now waiting to see what the supplier will do regarding the £15 I spent! Obviously a valve problem probably connected with the sludge maybe old stock. Anyway not fit for purpose. I can report that although the product was faulty Baldwins were most helpful and I will receive my refund.