On 24/06/2015 22:22, A.Lee wrote:
Fredxxx wrote:

This would be for a sealant between a sleeve and a pipe carrying gas.

I notice that the IGEM procedures use the term "mastic seal" as an
example but the description "mastic" is very vague.

Can anyone provide what sealant the trade use?

Something from the Pyrocoustic range:
http://www.fsiltd.com/sealant.html

Many thanks for the idea. I can't see any reference to sealing sleeves
carrying gas pipe.

I have come across intumescent sealant:

http://www.screwfix.com/p/no-nonsens...te-310ml/70510

though perhaps this is more appropriate:

http://www.screwfix.com/p/no-nonsens...te-310ml/77289
It says fire retardant in the headline, but it does claim to have fire
resistance.

What do plumbers really use?