Kemseal Roof & Gutter Repair Membrane

RESTORE, PROTECT, AND SAVE - the smarter way to renew your roof

A leaking roof or failed gutter doesn't announce itself until the damage is already done.

Water finding its way through cracked roofing, deteriorated flashing, or failing gutter joints causes structural damage, mould growth, and costly repairs - all of which are far more expensive than treating the problem early. Liquid membrane systems offer a permanent, flexible waterproofing solution that conforms to any shape and won't crack or lift over time.

The Kemseal range from Stratacote includes professional liquid silicone membranes, water-based epoxy primers, and reinforcing tapes — everything needed for a complete, lasting roof and gutter waterproofing system. Used by roofing contractors, builders, and maintenance teams across New Zealand on both residential and commercial projects.

Kemseal Liquid silicone Membrane is the proven solution for roof restoration delivering the strength and performance of a new roof at around half the cost of a full replacement. 

Specially designed to rejuvenate Butanol, Torchon, and other aged membranes and structures.  Kemseal forms a seamless, UV durable barrier that withstands ponded water and flexes with Thermal and Seismic activity, due to a 300% elongation factor to handle movement and stress. 

Whether for homes, commercial buildings, hotels & resorts, Kemseal extends the life of your roof, & provides lasting protection against the elements.  

Installed by approved applicators, it’s cost effective reliable & proven way to restore your roof with confidence & have a product & workmanship warranty for added peace of mind. (terms and conditions apply) 

  • Up to half the cost of a complete roof replacement. - Save thousands $$ without compromising on protection. 
  • Restoration method in situations when reroof is not viable.
  • Seamless waterproof barrier – stops leaks and resists ponded water. 
  • UV durable - Designed to perform in harsh sunlight & extremes of weather. 
  • 300% Elongation - Flexible and resilient, handling structural thermal & seismic movement with ease. 
  • Extends roof life – Breathe new life into butanol torchon and other membranes & substrates. 
  • Professional installation - applied by approved applicators for guaranteed results.
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Application

A step by step guide for roof and gutter restoration.
Contact Us for further advice for your project.
Step 1: Clean
  • Rinse off guttering with a water blaster and ensure you have a clean, dry surface before starting.
Step 2: Prep
  • Bridge sealing edges, laps, vents & joints in the guttering with Kemseal Reinforcing Tape or Kemseal Peel & Stick Tape.
  • Stir up both the Kemseal WBE Part A and Part B individually for a couple of minutes, until each of them is thoroughly mixed. The Dilute 10% with & mix
  • Mix together the Kemseal WBE Part A and the Kemseal WBE Part B until well combined.
  • Apply 1 Layer of Kemseal WBE to the whole area. Leave it to dry for approx. 6 hours, or until dry to touch.
  • Roller Nap 5 recomended for WBE application

Coverage: 1L Part A & Part B mixed does 6 - 8m2.
Step 3: Seal
  • Apply the Kemseal S-80 on top of this primer using a brush or small roller, within 2 days at the latest, to ensure the primer doesn't get too hard. Apply at rate of 2.5m2 per L (2 coats needed). Roller Nap 9 or 10 is recommended for application of KS-80.
  • Leave it to dry for approx. 3-12 hours depending on weather conditions and when it can be walked on without causing damage before applying the second coat. 
  • Apply the second Layer of Kemseal S-80 after the first coat is dry.

Coverage: A 9.5L pail of Keamseal will coat 4.75m2 total with 2 coats.

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