{if isset($product) AND $product}
    {if (is_object($product) AND isset($product->on_sale) AND $product->on_sale) OR
        (!is_object($product) && isset($product.on_sale) && $product.on_sale && isset($product.show_price) && $product.show_price && !$PS_CATALOG_MODE)}
        <div class="@iconSale.classNames @classNames">
            <span>{l s='Sale!'}</span>
        </div>
    {/if}
{/if}