Yes, there is the Facebook like button documentation, there is attribute data-href
where you can set the absolute URL of the page you are going to enjoy.
HTML5
<div class="fb-like" data-href="http://example.com/produtos/item-2"
data-layout="standard" data-action="like" data-show-faces="true" data-share="true">
</div>
XFBML
<html xmlns:fb="http://ogp.me/ns/fb#">
...
<fb:like href="http://example.com/produtos/item-1" layout="standard" action="like"
show_faces="true" share="true">
</fb:like>
<fb:like href="http://example.com/produtos/item-2" layout="standard" action="like"
show_faces="true" share="true">
</fb:like>
For the buttons to work, add this as soon as you open <body>
(as suggested by the documentation):
<body>
<div id="fb-root"></div>
<script>(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/sdk.js#xfbml=1&version=v2.0";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
</script>
<div class="fb-like" data-href="http://example.com/produtos/item-1" data-layout="standard"
data-action="like" data-show-faces="true" data-share="true">
</div>