I believe the black tank is ABS. As it's in the top, and the tank is vented through the roof, which means its not pressurized, a soft sealant should do the trick. I'd recommend "Permatex Black Silicone Adhesive Sealant" Comes in a 3 oz tube for about $5. Cut the nozzle so that it will fit in the woopsie. DON"T squeeze it in yet! Squeeze out a ball of sealant that will fit in the hole, then let it sit overnight. Then, next day, (24 hours would be best) Squeeze the ball into the holewith just enough new sealant to stopper it. Good to go, will out last me!
Hi Bob, I just read your reply to a streamer about winterization for a fast trip home to Canada today and surmise you know a thing or two about holding tanks We were screwing down our new coosa floor and accidentally screwed into the black tank. We did not puncture through but have about a 1/4" deep screw hole. Worried about that and want to patch weld it but need to know what kind of plastic we are dealing with. We have a 1992 Excella and I saw you have that year as well. Do you have knowledge of the plastic used for the black tank in that time period? Thanks!
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