supply of polyurethane type-a sealant of 3m single component.polyurethane type-a sealant of 3m single component.,polyurethane type-a sealant of 3m single component, polyurethane sealant 540 or equi valent make in 600 ml pack only as per technical specification given below. (1) type of sealant: polyur ethane sealant (2) cure method: moisture curing (3) application temperature :5 to 35 degree c (4) ser vice temperature: -40 to 75 degree c (5) cure rate :2mm/24 hours on porous substrates (6) specific g ravity :1.25 g/ ml. - 1.4 g/ml. (7) shore a hardness :28 to 55 (8) tensile strength:>1.3 n/mm2 (9) elon gation at break: min.500% (10) total joint movement: +/-50% (11) maximum joint width: up to 50mm (12) shelf life: minimum 9 months from the date of supply. ]