Pasto is an easy-to-apply sealant, particularly suitable for creating air- and windtight seals between underlays, vapour control layers/air barriers and rough surfaces. Application Sealing holes in plasterboard ceilings where services pass through vapour control layers/air barriers. Sealing underlays, vapour control layers/air barriers to rough surfaces eg masonry, abutments and chimneys. Sealing around nails. Irregular & rough surfaces. Timber frame: rough sawn, planed/finished or stained. Absorbent materials: brick*, sandstone*, concrete* or gypsum fibreboard. Synthetic materials: paper, fleece or similar, PE*, PP* or hard PVC*. Other surfaces: metal, glass, PURfoam. Humidity of 15 or more. All pitches of roof. Use both internally & externally.