Search Bar to search only products

I have the following code for my search bar:

<div id="search-bar">
				<form method="get" id="searchform1" action="<?php echo esc_url( home_url( '/' ) ); ?>">
					<input type="text" value="<?php esc_attr_e('search this site...','eStore'); ?>" name="s" id="searchinput" />

					<input type="image" src="<?php echo get_template_directory_uri(); ?>/images/search-icon.png" id="searchsubmit" />
				</form><!– end searchform–>
			</div> <!-- #search-bar -->

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I need to alter it so the search bar only comes back with products, not any of the articles written… Any ideas? The url is:

http://bottomsandbeyondboutique.com/

https://wordpress.org/plugins/woocommerce/