Sika 291i Sikaflex Cartridge From  £14.50

First class sealant adhesive bit pricey

This did the job of re-sealing windows on a 1973 Princess 32 very well. However, I bought this material rather a long time before I was able to complete the job which meant the sealer was actually at its "use-by"date when applied. The only problem was the gun-force needed to expel the sealant which I am confident would have been much easier with freshly prepared sealant.