Ah Volusion. Yes, we've run into this issue. Unfortunately, you can't add an
around the logical spot for the product name (at the top of the page below the crumb trail) So what we've done, and had very good results from in long tail / product-based search results, is to repeat the product name (sometimes with a bit of a keyword tweak) as the leading data in the product description area - where you do have control over the HTML.
Here's an example: https://www.diigo.com/item/image/3y63p/5pnd?size=o
The CSS which styles the H1's was edited to match the product name display at the top of the page, for consistency.
In order to quickly implement this run of site for all products, we used the CONCAT function in Excel to append the tags, and generally used the "productname" value to populate the heading text, then appended the closing tag + the actual description, and then just inserted back into the db.
CAVEAT: If you're pulling a product feed back out of Volusion, you'll want to strip the HTML out of that description, in order to not get wonky behavior in the CSE's (comparison shopping engines).
Hope that helps - if not, and there's anything else I can add - please let me know.
Cheers!
BMT