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Old 03-17-2018, 02:50 PM   #1
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Join Date: Mar 2018
Location: Belleville
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Caulking roof


We just bought a 2007 Sprinter 377BHS. Before we park it in a park I want to caulk the roof and vents just to be cautious.

What type of caulking is used and where do I get it?

Thanks in advance
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Old 03-17-2018, 04:14 PM   #2
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Dicor 501LSW-1 Lap Sealant - self leveling- For horizontal surfaces. Amazon or Camping World. RV dealer would carry it too - probably more $.

EternaBond RSW-4-50 RoofSeal Sealant Tape is good for taking care of "accidental" cuts in the roof material. I carry some in the RV just in case

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Old 03-17-2018, 04:24 PM   #3
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A 2007 Probably has a EPDM (rubber) roof membrane. Later models changed to TPO (plastic) roof membrane around the 2010-2013 years.

You can verify the type of roof membrane on your Sprinter by removing the inside vent fascia from one of the roof vents. There are 4 screws holding it in place. You'll also need to remove the vent handle by removing the center screw. With the fascia removed, you can see the edge of the roof membrane where it was cut, pulled inside and stapled to the wood structure. Look at the underside of that membrane. If the top is white and the bottom is black, it's EPDM. TPO membrane is typically the same color on both sides and some has a "fiber backing" on the underside.

If your roof is EPDM, then get DICOR self leveling sealant at any RV store. DO NOT USE SILICONE or any product with silicone in it !!!!! Clean the roof thoroughly, remove any loose or damaged sealant and apply a new coat over the old, overlapping the edges so the new sealant covers any area where you removed sealant and covers all the "old edges". Allow the sealant to dry, it will take 3 or 4 days to lose the tacky feeling.

You can download the DICOR roof care handbook here:

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Old 03-18-2018, 04:44 PM   #4
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Many thanks to Norskebob and JRTJH. I had the same question with regard to the roof of my 2007 Sprinter RLS 724 which we are picking up on Friday April 13th. (Hope it's a good omen. Maybe I'll buy a lottery ticket too)

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