Arc External Grade Decorators Filler is a solvent free sealant that can be applied both externally & internally. Typical applications include sealing around window frames, architraves, cornices, PVC profile trim and cladding, sealing/filling cracks and gaps in brickworks, stone, concrete and between skirting board and walls. Can also be used as an adhesive for bonding polystyrene. Contains a fungicide to discourage mould growth. Arc External Grade Decorators Filler will not crack and is easy to apply with a standard sealant gun. No sanding required and can be over painted once fully cured, making it an ideal all purpose sealant/filler when decorating.