What's it called?

Captain_Flack.

Plumber came round and sealed round the boiler flue with a sealant. It was in a white tube and I thought it was grip seal. Can't find it anywhere using google.

jhgkp

Something like this

http://www.screwfix.com/p/geocel-trade-mate-plumba-flue-silicone-black-310ml/66373?kpid=66373&cm_mmc=Google-_-Product%20Listing%20Ads-_-Sales%20Tracking-_-sales%20tracking%20url&gclid=CPrQh8WM07sCFfHMtAodSWkAiw

Captain_Flack.

Yeah something that but it was deffo a grip fill type.

diywhynot

Captain_Flack. wrote: »

Plumber came round and sealed round the boiler flue with a sealant. It was in a white tube and I thought it was grip seal. Can't find it anywhere using google.

Have you asked the 'plumber'?

Captain_Flack.

He's on holiday.

diywhynot

Can't it wait until his return? We can speculate but he is the one with the definitive answer.