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fire retardant or low flame spread coatings over foam.

fire retardant or low flame spread coatings over foam.

fire retardant or low flame spread coatings over foam.

(OP)
Hopefully I am In the right forum, & hopefully I can get some direction.
The problem is to find a solution regarding fire supression
in a boats engine room.
The matter at hand is the fact that expandable foam was injected into adjacent compartments both sides of the engine room -for floation and noise supression .These compartments must be open to the main engine room for engine room air and cable / wire runs.
Also these boats , being goverment boats have recently fallen into a new set of regulations with tighter standards than at the time of building. Even though they are only 26 ft. boats.
The question is --
fire retardent or low flame spread spray  coatings over foam?
My impression to date is that any  coating over foam would be inefective due to the fact - that in a fire situation the foam would slump along with the barrier coating resulting in a break of the coating ,  rendering the whole exercise useless!
My other concerns
* acess to these compartmens is very diffucult (spray or brush on coatings are the only fesiable method}
* approval of canadian coast guard ship safty branch - meeting or exceding standards set out in TP 322 sec. 10

The other thought is going sidewise , The concern of the marine surveyor that brought this  up is that the foam adjacent to the engine room - could in time - absorb diesel fuel and engine oil, makeing it a dandy accelerent.
It is a closed cell foam , but prehaps a prouduct that could be put over the foam that would be oil , fuel and water resistant would meet crieteria.
Thanks for your time and any direction would be great.

Bob






RE: fire retardant or low flame spread coatings over foam.

Bob,
You are right that nothing sprayed over the foam will prevent the collapse of the foam itself under the heat of the fire. You could, however, stick a plate on the top of the foam and spray the metallic plate with Chartek or similar. I assume that your foam will not ignite behind the plate at some 300 F heat.
cheers,
gr2vessels

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