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Showing posts from July 18, 2013

Goop?

Hi, has anyone ever used something called "Goop", a kind of gluey substance some sofrim put on the bottom of the tefillin shel rosh which stops moisture enetering the bayis and warping it?

If yes, does anyone know why this is not a chatzitzah, also, what is it made of and where can one buy it?