Why is the resin sticky!

Tim Evans Uncategorized

Resin does not dry,  it cures.  However, when it is in contact with air,  it will remain sticky.  When it is not in contact with air,  such as *inside* a crack or underneath a cure tab, it will dry to a non-sticky soft plastic.
To see the difference, put two drops on a windshield and cover one with a cure tab.  Cure both with a UV lamp or sunlight.  After curing remove the tab and scrape both drops off with a razor.  The uncovered drop will be sticky.  The covered drop will be dry.
This is why the resin works (while still remaining somewhat flexible) inside the glass.