What is self-sealing lapping?

I am installing Titanium PSU30 (self-adhesive Ice & Water shield) and I read that in high wind areas, if you are not installing the roof layer immediately after applying the PSU30, you should use "self-sealing lapping" on the seams to prevent uplift. What is self-sealing lapping exactly? And is there a preferred brand?		Brad C 10/17/2017	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/22550/find/
It should be fine. Hit the seams with a roller (i.e. for bonding laminate) and it should be fine. That stuff really bonds as long as you are sticking clean to clean. Your underlayment should extend over the Ice/Water and have that cap nailed/stapled down to the roof.		Eric Novotny An informed customer is the Best Customer! 10/17/2017	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/22551/find/
I was told by the folks I purchased the roof from that the PSU30 would suffice as the ice and water & underlayment as I am covering the entire roof with the PSU30. It sounds like I should have another layer on top of the PSU30...		Brad C 10/17/2017	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/22552/find/
The ice and water is fine for the whole roof, but I prefer a slip layer so that nothing sticks to the back of the metal panels.		Eric Novotny An informed customer is the Best Customer! 10/17/2017	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/22553/find/

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