Originally Posted by campbuzz98
I thought you couldn't use petroleum distillates(acetone) on the rubber roof. It degrades it according to the manufacturer of thst rubber roof.
You need to prep the Dicor "to make it sticky" and clean the oxidized rubber from the roof material. Eternabond Primer is what is recommended by the manufacturer of the EB tape; however an Acetone damp rag works just as well. Just not too much and it evaporates immediately.
EternaPrime Spray Primer, 14 oz. Can
This is from the Best Materials web site FAQ:
Subject: Best EPDM Seam Construction
Q: I am re-doing my RV roof with white epdm. I will have a seam across it and I am having a hard time understanding which seam seal method I should use. Can you help me understand this?
1) 3" or 4" seam tape, with primer?
2) 4" double stick 60mil no primer ($57.95 for 50')?
3) Splice adhesive ($60.00 for 1 quart)
A: The best practice is to create a double lap-seam. It will out-live the roof. Create as follows:
1. clean, overlapping EPDM pieces, in preparation for 3" wide Doublestick. If you have an OLD roof surface, prime the surfaces first. New EPDM can be generally just cleaned well.
Insurance: Just prime both surfaces before applying Doublestick seam material.
2. apply use 3" Eternabond Doublestick Seam tape (Doublesided sticky tape sealant), and roll well.
3. Then cover the exposed seam edge with a piece of COVERSTIP TAPE (6" wide, EPDM faced peel/stick tape). PRIOR to applying this, clean surface and prime. Only prime in areas where the coverstrip will be exposed.
Now you have a double sealed seam, which will take foot traffic, and outlast the rest of the roof.