Quieting inside the curtis cab on 900

C

cowdog

Member
I know the machine is just fine with the top and windshield but when you install the doors it gets very loud. I bought a bulk pack of dynamat xtreme and removed both rear and bottom seats and double layered it with dynamat. Also used some behind the legs. That took 8 18"x32" sheets to do that and it fit nicely and don't look to bad. I also installed sheet number 9 on the underneath side of the bed right over the engine. I installed one of the bed stall mats in the bed from tractor supply on top of the spray in bedliner. I wasn't sure at first if I was just wasting my money by doing this but now I think it was worth it. It made the cab much quieter inside and stopped a lot of the vibrations. I have around $190.00 in the mat and dynamat. I believe the dynamat is more of vibration eliminator than acoustic insulation but it is very thin and it fit very well behind the backrest and under the seat. Sometime I would like to use it underneath the hard top and see if that would help even more. I may be the only one that thinks it's loud inside the cab but I was just wanting to know if anyone else had anymore ideas on quieting it. I know the 1100 cab has a very thick insulator between the engine and cab. I think the specs on the dynamat xtreme say it is good to 300° f so the piece under the bed should be fine.
 
Any consideration for weathering of the dynamat? The dynamat material I've used is not designed for exterior use. I have thought about doing the same to my cab. I have found some very dense foam which I used to 'plug' the holes at the seat belt anchors and the dump bed lever, around the roll bar tubes and any where else I could see light or feel air. It has help keep the interior warmer and marginally reduced the interior noise. I just crank up the tunes and all that rattling seems to just go away...........
 
I don't think you can use the regular dynamat outside but the dynamat xtreme is a rubber or tar material with aluminum foil coating. I washed my floorboard out and got it wet and water just beaded up and ran off. For the long term I guess well just have to see. I had thought about coating it with some of the black spray rubber under body coating it is supposed to be sound deadening also. I cleaned every thing good with a solvent and then applied and rolled it with a roller it made a very good seal. The only thing that is in the weather is the foil. The specs say it is water resistant and is good from -65 to 300 degrees.
 
Last edited:
One of the benefits of a career in aviation is that you don't hear too well when you get old. It never occurred to me that the inside (or outside) of my RTV900 is "loud."
 
there is a product call Lizardskins that sprays like the liner spray. It has heat and acoustic spray but I have not used the product. I was looking for sound quieting product for my 1100 and plan on using the dynomat on the under side of the seat area. Love your machine and welcome
 
Thanks for the reply Stuck in NJ and chikenmanbota. That is a very good idea to seal around the roll bars.
 
Just got back home from SEMA (Las Vegas), Lizardskin is the recommended product fro exterior sound deadening. It will stick t both steel and plastic (engine cover under the seating area). The folks at the Dynamat booth were great but do not recommend underbody exterior exposure to their product. It will loose adhesion and fall off. I ordered a undercoatimg spray gun while I was there and will find a local WD for Lizardskin products. Looks like I found something to keep me busy this winter between snow storms.
 
I guess if the dynamat xtreme falls off I will look into lizard skin. The only place that I might have a problem is under the bed. If you have ever stuck a sheet of this stuff on it will stick to about anything. Well see how long it lasts. I think Lowes sells some stuff that looks just like the dynamat that is for exterior use on buildings that I might look into. If nothing else I found out I was on the right track.
 
Last edited:
You must log in or register to reply here.
Top