Liquid based polysulphide sealant is composed of catalyst and resin in precise amount. This two part fuel proof joint sealant has elastomer based content. This sealant has excellent flexibility level. Provided sealant shows strong adhesive properties to different types of building materials. This sealant is preferred over commonly used sealants like asphalt mastic, bitumen etc. Offered polysulphide sealant can be accessed in pour grade and gun grade versions.