I needed to make a repair on some PVC pipe. When I opened my can of cement, I discovered that is was thicker than when new. I purchased the cement around a year ago and kept the lid firmly closed. The can is about 2/3 full. I could still easily spread the cement around the pipe. At what point is the cement no longer viable? Can it be made viable by thinning it with PVC primer? Yes, I should go purchase a new can of cement.
Thin thick PVC cement with primer
pvc
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Best Answer
I use MEK (methyl ethyl ketone) available at most hardware stores. It has always worked for me and I've never had a fitting failure yet. I have had fittings fail from using thickened glue. Granted it's not the best thing to do, and I always buy a new can as soon as possible. But I do know where you're coming from when you need to do something to be able to finish a job, and can't run to a store at 3 am, or when you are 30 or more miles from any supplies.
Being that is the main ingredient in most welding adhesives or glues. Look at any MSDS Sheet and you will see the solvent used in it. For example: http://www.speedlinepvc.com/user/pdfs/5152-pdfs-5-file.pdf
I know I'm satisfied with my results. And storing that can upside-down always helps. I've even spread a bit of the glue around the top of the can to dry into a seal if I know I'm not going to use it for a really long time.