Selleys Liquid Nails Instant Construction Adhesive Hold is a high-strength adhesive that delivers an instant hold, without the need for clamps or supports.* It will hold up to 400kg per m2* on any building material even on vertical surfaces - and adheres to wet and damp surfaces. It must not be disturbed until its fully cured after 48 hours. Selleys Liquid Nails holds instantly but must not be disturbed until fully cured. Weight is restricted for non-porous substrates including, for example, metal & glass - support may be required where the object exceeds 5kg. Not suitable for PE, PP, PTFE, and some rubbers. Some support may be needed for objects over 5kg.