Substitute for Dynomat

Afriend sent me this link and thought I would share. He says this is the same as Dynomat but alot cheaper. Anybody try this?

The price is sure right.

http://www.lowes.com/pd_154017-81326-PS625_0_?productId=1018733&Ntt=peel%20and%20seal&Ntk=i_products&pl=1&currentURL=/pl__0__s?newSearch=true

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