All-purpose polyurethane gap filling expanding foam. Moisture curing self-expanding foam with the specially designed Genius Gun patented trigger mechanism that ensures precise dosage and removes the need for an additional gun. Easy to use, can be operated with one hand and is re-useable up to 6-weeks after first use. General all-purpose filling of holes, gaps and joints. Adheres to all common building materials, resistant to water, heat and ageing. Can be cut, sanded, plastered and painted after full cure. Not UV resistant. Re-usable. Single handed operation. Fast curing. Expansion rate - 35 times initial volume.