Sensa: 15-year warranty All Sensa granite and quartzite products offer a 15-year, certified, written warranty. Cosentino anti-stain natural stones give you full confidence in all your projects. Activate your warranty Requirements for completing the Sensa warranty form 1. Provide your invoice/proof of purchase. 2. Register the warranty on the website within 6 months from from purchase. Any product that has not been registered within a period of 6 months from the date of purchase will be covered by a 2-year warranty if the invoice is submitted. Letter of Warranty Download your Letter of Warranty – only applicable to those products that are sold and registered. Download