Karnak 19 Ultra Instant Roof Repair

£13.67 Incl. VAT
£11.39 Ex. VAT


Karnak is the ultimate repair compound providing a rapid, instant and permanent waterproofing repair. Its unique formula means that it is suitable for application onto wet or dry surfaces and can be applied in heavy rain or under water. Can be applied to most surfaces and with the addition of tape.


Unique no rip formula provides an instant, rapid solution to stop leaks permanently. Can be applied onto wet or dry surfaces & even underwater or in rain. Ideal for detailing roof lights, up stands & parapet walls.



  • Works Underwater
  • Instant results
  • Permanent
  • Elastic
  • Fully Bonded
  • Easy to use


Suitable surfaces

  • Downpipes
  • Chimneys
  • Wood
  • Skylights
  • Gutters
  • Felt
  • Asphalt
  • Metal
  • Bitumen
  • Concrete
  • Masonry
  • Roofs
  • Balcones
  • Walls
  • GRP
  • Tiles


Application and Use

Prior to using Karnak 19 Ultra, ensure all surfaces are clean and free from oil, grease, dust, dirt, loose paint or other foreign matter. When possible, excess water should also be removed for best results however Karnak 19 ultra can be applied under water when required.

When repairing blisters, cracks and breaks, spread 19 Ultra over the damaged area at an average thickness of ½ cm. Then, embed Karnak 31 GRP Tape Fibreglass Membrane in the 19 Ultra, before finally applying another layer at a thickness of around ½ cm.



Approximately 2 sq./m per Litre at ½ cm Thickness (Heavily aggregate surfaces and cracks will consume more)




Payment & Security

Mastercard PayPal Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

You may also like

Recently viewed