Cityseal is now trading as Skyline sealants click here for our fantastic new website -


Areas covered

City Seal can provide all types of sealant application requirements to the Uk. London, South East, Cumbria, Newcastle, Sunderland, Dumfries, South West Scotland, Carlisle, Lake district,

For further enquiries on sealant products and mastic application services please use the contact link.




Contact us - Phone:

Toby - 07778769948

Office - 01228 573799


Services Provided.

In addition to sealing high profile glass atriums, City Seal provides a vast range of other services that involves the application of silicone sealant. Listed below are the main types of work undertaken, further services can be provided on request.


  • Window perimeter silicone joints 
  • Bathroom sealant /Tile & Unit Sealing
  • Air test silicone jointing
  • Curtain Wall mastic pointing 
  • Structural Glazing Sealing
  • Planar Glazing System Sealing
  • Glass to Glass sealant application 
  • Rain Screen mastic Pointing 
  • Exterior Panel Cladding sealant Joints 
  • Curtain Wall silicone pointing 
  • Wet Gasket Joints 
  • Stone Panel Cladding mastic Joints 
  • Expansion Joints polysulphide or silicone
  • Blockwork joints 
  • Fire Rated Intumescent sealing 
  • Cut out and replace sealant 
  • Draught Exclusion silicone
  • Cosmetic Fillet Work 
  • Ruber Membranes 
  • General Water Tests & Leak Repairs