Primer for non-porous joints


Polyprime NP is a single component solvent based adhesion promoting primer for joints in non-porous substrates like glass, stainless steel. the primer forms a chemical bridge between the surface and the sealant which is applied into the joint.


  • Strengthens the adhesion of joint sealants to non porous surfaces such as stainless steel, glass and other non absorbent surfaces
  • Single component
  • Easy to apply

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 surface 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. On painted surfaces all loosely adhering paint must be removed (contamination will reduce the strength of the bond), if in doubt remove all previous decorations. To optimize adhesion of both the primer and the sealant, remove all round or sharp edges and corners. Ensure that the surface is absolutely dry before the primer is applied.


Polyprime NP shall be applied to clean, dry surface prior to the installation of backer rod or bond breaking tape. POLYPRIME NP can be applied by a brush in one thin and uniform coat. the sealant shall be applied only after the primer becomes tack free. a recoat of the primer is required to be applied on the surfaces if the sealant application gets delayed by more than 3 hours after application of the primer. for obtaining a clean and neat finish, masking tape shall be applied on both the edges of the groove before applying the primer and shall be removed once the sealant installation is complete. 


Clean all tools with Polysolvent immediately after use. Hardened materials can be removed mechanically only.