Owens Corning Energy Complete Sealant is Greenguard Gold Certified, meaning it emits the least amount of VOCs on the market. In fact it is approximately the same level as Zero-VOC paint. It’s perfect for crawlspaces, attics, and anywhere there’s a draft. Approximately 5-8 tubes cover 1,000 sq ft. Any extras can be sent back and refunded. A separate gun is needed to apply and is available for rental here.