Van's Air Force
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Firewall sealant
- Thread starter hamblin10
- Start date
As far as I know, that is the correct interpretation. That sealant is used generically as an adhesive/sealant in a number of places throughout the build.
FYI, 3M makes a fire proof sealant that comes in a tube for a caulking gun that would be quite a bit more convenient for these type of small applications.
rocketman1988
Well Known Member
…and
…and the Fire Barrier 2000+ is NOT the same that they sell at most big box stores, labeled with Fire Barrier CP.
Make sure you get the 2000+ type.
…and the Fire Barrier 2000+ is NOT the same that they sell at most big box stores, labeled with Fire Barrier CP.
Make sure you get the 2000+ type.
Don't use a polysulfide sealant (aka proseal) in a firewall.
The FireBarrier 2000+ tests well.
I recently ran some tests with "real" firewall sealants. They generally fall into two classes, rubber based and silicone based. The recent market entries all seem to be silicones. Current favorite is Dapco 2100, as it is single part, no mixing, thus easy to dispense with little waste. Performance appeared to be on par with the two-part choices.
As Bob said, the home store 3M sealant is a latex base. Nope.
The FireBarrier 2000+ tests well.
I recently ran some tests with "real" firewall sealants. They generally fall into two classes, rubber based and silicone based. The recent market entries all seem to be silicones. Current favorite is Dapco 2100, as it is single part, no mixing, thus easy to dispense with little waste. Performance appeared to be on par with the two-part choices.
As Bob said, the home store 3M sealant is a latex base. Nope.
sc_pilot
Active Member
I’m curious why you say not to use Polysulfide on the firewall? I bought Flamemaster CS3204 tank sealant for my firewall as the plans said to “apply tank sealant to all seams and rivet heads on the firewall”. Is there a great concern of using polysulfide and should I now scrape off a hundred rivet heads? I’m not trying to argue, just curious cause the plans didn’t say to avoid using a particular type of sealant.
Attachments
I've wondered about this too. Has anybody asked Van's tech support? For those of us building E-LSA, I think we're supposed to use whatever is specified in the plans.
I'll modify the statement. Don't use proseal in overlap seams.
Sealing the head of a rivet on the engine side of the firewall is not a problem. Use proseal if you wish. As a general rule, you can put practically anything on the engine side of a firewall without concern.
Sealing the head of a rivet on the engine side of the firewall is not a problem. Use proseal if you wish. As a general rule, you can put practically anything on the engine side of a firewall without concern.
Brantel
Well Known Member
Well, for me personally, anytime I am dealing with the firewall I am concerned about fire.
If you have a fire in front of the firewall, it gets bad fast! Just some of those concerns are when stuff heats up and starts melting, off gassing, billowing smoke and burning.
Have had many a firefighter tell me that most people die from smoke than from the actual fire during an incident.
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An E-LSA builder will sign a document stating that is what they did.
Without remembering exactly what they were, I recall there being at least a few places where this was may have not even been possible due to availability of materials or parts changes.
