One component superior quality acrylic sealant


Polyseal AC is a one component superior quality, high performance water based acrylic sealant. The sealant on curing forms a pliable flexible seal with minimal shrinkage. Polyseal AC is primarily intended for internal & external pointing applications. Polyseal AC can be used in both horizontal and vertical applications.


  • Excellent adhesion to most building substrates. Can be used without the use of primer in new substrates.
  • Weather resistant.
  • Fast drying.
  • Odorless.
  • Easy to apply, one component sealant. No mixing required.
  • Greater flexibility and higher movement.
  • Good compatibility with paints and emulsions. Can be over painted.
  • Good resistance to water and water vapour.
  • Non-staining.

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


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, sand blasting or solvent cleaning may be required to expose a clean and sound substrate. When applied on glazed surfaces like ceramic or terrazzo tiles or porcelain enamel joint surfaces, the glaze should be removed by abrading with sandpaper or wire brush.


Usually priming is not required, however on highly absorbent surfaces, dilute Polyseal AC with water (1:3 by vol.) and prime the joints with it. The primer shall be applied by a brush in a thin coat application and shall be allowed to become tack free prior to the application of the sealant. For obtaining a clean and neat finish, masking tape shall be applied on both the edges of the joint before the application of the primer or the sealant and shall be removed once the sealant installation is complete.


A bond breaking backing rod (Polyrod)* shall be inserted into all movement joints to avoid a three sided adhesion. The diameter of the backing rod shall be at least 20% larger but not greater than 33% of the joint width. A bond breaking tape may be applied to joints where the depth does not allow the application of the backing rod.


Polyseal AC is available in a ready to use pail and a self-contained cartridge which can be loaded onto a caulking gun. Start extruding the sealant firmly into the joint or apply with a spatula if using from the pail. On vertical joints, sealant extrusion shall start from the bottom of the joint and continued to the top. Once the sealant has been installed, tool it to obtain a smooth profile. Do not ise soapy water solution. Any masking tape applied should be removed immediately after the sealant is installed.


Dispersion based paints can be applied after 24 hours of application of the sealant. Solvents based paints can be painted after 7 days of application of the sealant.