Definition: The associative property states that you can add or multiply regardless of how the numbers are grouped. By 'grouped' we mean 'how you use parenthesis'. In other words, if you are adding or multiplying it does not matter where you put the parenthesis.
Full Definition of ROSIN. : a translucent amber-colored to almost black brittle friable resin that is obtained from the oleoresin or deadwood of pine trees or from tall oil and used especially in making varnish.
The Trimaco 36 in. x 166 in. Heavy-Weight Red Rosin Paper is an excellent moisture barrier making The paper useful for flooring and roofing projects. Ideal to use as underlayment, in landscaping, plastering and as protection against overspray. For roofing use as a protective barrier to prevent asphalt or coal tar dripping.