Canvas seam sealer

[jmott]

Hello... I recently bought a used Coleman popup and when I open it up there are some pieces of what looks like wax that has popped loose... I guessing it is coming from the window zippers but could be coming from the canvas seams. What has someone used for this that really works as far the sealing seams in the sides where the canvas meets the top? I've seen mention of using Liquid Stitch, is there anything else that may work for this application?
Would it be best to seal seams from the outside or inside?

Thanks in advance for advice...

[Ray,IN]

If your Coleman truly has canvas, try an Army surplus store. We used to re-seal canvas with a paint-like sealer on the outside.

[jmott]

Thanks.... it's actually Sunbrella I think... but I think the stuff I'm seeing on the bunks may be wax someone put on the zippers.

[Superslif]

When we had our 99' Coleman (99'- 05') I remember the zippers being a little tight, especially zipping them up around the corners. I was always afraid of having a zipper come out of its track. Same thing with our 05' Aerolite hybrid we use now, I'm very careful with the zippers.......