I am replacing my 20 year old sanitation hoses. Just started today and going well. I have a question. On the top of my holding tank are the two fittings you see. The white hose is the holding tank vent hose and fitting. The black hose is the sanitation hose from the head to the holding tank and fitting. Both fittings thread into a washer like plastic piece. The washer like plastic pieces have a caulk like white material underneath them to adhere them to the holding tank. It was still holding well after 20 years and pliable and tacky. I don’t know what this adhesive is. As I removed the vent hose and sanitation hose today I encountered this material. It seems it was acting as an adhesive and sealer. Any idea what it is? I would like to know and use the same or similar caulk/adhesive. I attached a photo.
What is this adhesive/caulk/sealant?
- Thread starter Mike8193
- Start date
If it's still pliable it could be pre-EPA butyl tape. That stuff lasts a long time. If you need to replace it, Bed-IT tape is the only thing I know that still offers the pre-EPA characteristics. SBO has it in stock, just type Bed-IT into the store search.
The hoses on my MSD system are so tight no sealant was considered. Heat, in the form of hot water or a hair dryer/heat gun, was the solution for installation and removal. If you are connecting pvc to some other hard surface then sealant would be be expected. However, flexible hose that is fitted over a barbed nipple and double clamped, would certainly not have space for butyl tape. Maybe plastic piumber's tape, the thin, stretchy stuff on a spool that's wrapped around the threads on pipe fittings was used. But how would it stay in place if you're trying to wiggle the hose onto the fitting? Perplexing. I'll be interested to see what you find out.