This is probably a dumb question and possibly redundant. What is the shelf life of CA glue if left out in the shop and/or if kept in refrigeration? Is it longer if still sealed, ie: unopened? Is it a sharply descending curve of holding power, ie: strong for 90 days then strong to weak in 30 days? Or a gradual descending slope, ie: strong for 6 months tapering to worthless in 1 year? Tried to contact Starbond, but no luck. And while we're at it, is there a particular brand and/or viscosity preferred by folks here?