Q I want to know how long I can use for Pro Glue.

A.  In general, all of the glue is firm together by its ingredients

and becomes progressively hardened without opening the glue

and is subject to high temperature and humidity.

As a result, we do not recommend bulk purchases for glue,

and the less glue, the faster it becomes firm.

As time passes, adhesive in the glue is volatilized

 so older the products have less adhesive.

The recommended period is 30 to 50 days.

The hard type glue for DIY is

KC Certified glue using highest-quality materials of hypoallergenic components

so it is suitable for DIY glue.

It is also good for more hypoallergenic procedures.

Use it as soon as possible after opening the glue.