Gorilla Heavy Duty Construction Adhesive is a tough, versatile, all-weather adhesive. It's 100% adhesive formula provides a long-lasting, heavy duty bond. We call it All Surface, All Purpose. The durable, 100% waterproof formula holds up indoors and out and bonds virtually anything including subfloor, mirrors, trim, drywall, landscaping, bath surrounds, foam board, marble and more. TERMS OF SALE: If, after receiving this item you discover that it was not the one you wanted, simply return it for a full refund within 30 days. Refund is void if you have installed, used or damaged the item in any way. Item must be returned with its original box, packing materials and instructions. International buyers: Customs fees, duties, taxes, tariffs other fees are your responsibility. Arrival time wil.