2 part gun grade polysulphide sealant for wide joints


Polyseal PS+ is a two component non slumping, chemically curing sealant for wide joints. It is based on a liquid polysulphide polymer which when mixed with the hardener, cures to form a tough, flexible and non staining rubber like seal. Polyseal PS+ is specifically designed to be used as a watertight seal for overhead moderate movement joints and joints with widths greater than 30mm. Polyseal PS+ has excellent adhesion to concrete, stone, metals and other common building substrates. the cured sealant has good resistance to most environmental chemicals & resists deterioration on prolonged exposure to UV. The sealant has a movement accomodation factor (maf) of ±25%.


  • High resistance against industrial chemicals, hydrocarbon fuels and effluents
  • Highly resilient with excellent recovery characteristics
  • Provides permanent and uniform watertight seal
  • Non-staining
  • Excellent resistance to fatigue and stays flexible throughout its service life–won’t become brittle, caulk or crack due to ultra violet exposure
  • Prevents uncontrolled cracking by allowing expansion and contractions during temperature changes
  • Excellent adhesion to most common building substrates
  • Good resistance to ageing. Retains joint soundness once cured
  • Resistance against mild chemicals, hydrocarbon fuels, sea water
  • Non-toxic. Can be used in potable water applications, swimming pools

This TDS is applicable for the United Arab Emirates only. Please contact your local Polybit sales office for the available TDS in your region

Step by Step

Joint preparation

The joint edges must be clean, dry and free from oil, loose particles, cement laitance and other contaminants which may affect the adhesion. A thorough wire brushing, grinding, grit blasting or solvent cleaning may be required to expose a clean and sound substrate. The compressible joint filler shall be cut back to expose a uniform joint depth. 


The primer Polyprime PS* shall be applied to clean, dry surfaces prior to the installation of backer rod. The primer Polyprime PS* shall be applied to clean, dry surfaces prior to the installation of backer rod. 

Back-up Material

A bond breaking backing rod (Polyrod)* shall be inserted into all movement joints to avoid a three sided adhesion. for static and joints where the depth is not sufficient for the use of the backing rod, a bond breaking tape may be applied to prevent the three side adhesion.

Mixing & Application

Polyseal PS+ is available in a ready to mix container with all the components packed in a single tin. The material shall be mixed thoroughly with a slow speed drill (300-400 rpm) fitted with a flat bladed paddle for 2-3 minutes till a uniform colour and consistency is achieved.

DO NOT PART MIX. Since the base and the curing agent ratio controls the ultimate physical properties like adhesion, durability and strength, one complete kit has to be mixed at a time. The side and base of the container shall be periodically scrapped with a scrapper to ensure that the curing agent is properly dispersed and blended in the mix. Load the sealant immediately into the barrel gun by a heavy duty follower plate. Start extruding into the joint firmly by maintaining an even pressure on the trigger off the gun. Vertical joint sealing shall commence from the bottom of the joint and continued to the top. Overhead sealing shall start from one end of the joint. Once the sealant has been installed a suitable rounded tool soaked in a soapy water solution can be used to achieve a smooth hour glass profile. Any masking tape applied should be removed immediately after the sealant is installed.