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Insulation!!
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<blockquote data-quote="defcon1" data-source="post: 1768309" data-attributes="member: 30064"><p>Ok...this coming weekend, I'll complete the floorboards, and I think, the two front doors.</p><p></p><p>After working with the bitumen flash strips for a while, I've come to the conclusion that it works well on parts of the car the don't heat up, whereas, on the parts that do, you WILL want to use some better material.</p><p></p><p>Hence, Bitumen strips you would use on...</p><p></p><p>a) Boot area but make sure you layer over it with Insuflex or some equivalent material to soak up anything that may ooze out expecially above the muffler.</p><p></p><p>b) Rear wheel wells - ok. also layer with Insuflex.</p><p></p><p>c) Rear seats - you might not have the space to layer with insuflex. But there is already a bitumen sheet there (factory applied), so you only need to dampen around it, if necessary.</p><p></p><p>d) Floorboards up to the pedals - no problems here. Insuflex layering will definitely help. Make sure you cut holes for all the difficult areas like the rails for the front seats, etc. You may want to avoid layering areas where the original plastic mouldings meet the body as it will be darn difficult to get the mouldings back in place again.</p><p></p><p>For the firewall, and doors, you will probably want to use better material. I cannot anticipate 2 things...</p><p></p><p>a) That the bitumin will continue to stick even when the firewall or skin of the car door is hot. 50 degrees C is probably still ok. 60 degrees C is pushing it. Even though the material is rated to 80 degrees C, I don't feel like using my car for a test vehicle, considering that if it fails, I'm the one who is going to have to clean it up... <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1425" alt=":smile:" title="Smile :smile:" loading="lazy" data-shortname=":smile:" /></p><p></p><p>b) How hot the firewall or skin will heat up to under various conditions. Don't forget...when you stick bitumin eg. on the outer skin of the door, you also compromise the heat radiating capacity of the door material itself, so it will probably "pool" heat in the metal. A car door in mid-afternoon sunlight could possibly reach 55 degrees C or more.</p><p></p><p>So, I've finally called Grexer and ordered half a roll of Raammat, which should allow me to do 4 doors and the non-horizontal part of the firewall.</p><p></p><p>I'll let you know how it is.</p></blockquote><p></p>
[QUOTE="defcon1, post: 1768309, member: 30064"] Ok...this coming weekend, I'll complete the floorboards, and I think, the two front doors. After working with the bitumen flash strips for a while, I've come to the conclusion that it works well on parts of the car the don't heat up, whereas, on the parts that do, you WILL want to use some better material. Hence, Bitumen strips you would use on... a) Boot area but make sure you layer over it with Insuflex or some equivalent material to soak up anything that may ooze out expecially above the muffler. b) Rear wheel wells - ok. also layer with Insuflex. c) Rear seats - you might not have the space to layer with insuflex. But there is already a bitumen sheet there (factory applied), so you only need to dampen around it, if necessary. d) Floorboards up to the pedals - no problems here. Insuflex layering will definitely help. Make sure you cut holes for all the difficult areas like the rails for the front seats, etc. You may want to avoid layering areas where the original plastic mouldings meet the body as it will be darn difficult to get the mouldings back in place again. For the firewall, and doors, you will probably want to use better material. I cannot anticipate 2 things... a) That the bitumin will continue to stick even when the firewall or skin of the car door is hot. 50 degrees C is probably still ok. 60 degrees C is pushing it. Even though the material is rated to 80 degrees C, I don't feel like using my car for a test vehicle, considering that if it fails, I'm the one who is going to have to clean it up... :smile: b) How hot the firewall or skin will heat up to under various conditions. Don't forget...when you stick bitumin eg. on the outer skin of the door, you also compromise the heat radiating capacity of the door material itself, so it will probably "pool" heat in the metal. A car door in mid-afternoon sunlight could possibly reach 55 degrees C or more. So, I've finally called Grexer and ordered half a roll of Raammat, which should allow me to do 4 doors and the non-horizontal part of the firewall. I'll let you know how it is. [/QUOTE]
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