Greengates Builders Merchants

310ml Roof N Gutter Sealant Cartridge- Black


Please Call Us

Roof N Gutter Sealant is a bitumen based mastic providing an effective seal between all roofing materials.


  • Incorporates polymer additives to improve adhesion.
  • Can be applied in wet conditions, even under heavy rain.
  • Semi-drying - remains permanently elastic beneath surface skin.
  • High solids formulation - excellent gap filling properties without shrinkage.
  • Excellent external weathering properties.

Areas for use:

  • Fills and seals gaps/cracks in most roofing appli­cations.
  • Bonds to: concrete, roofing felt, lead, zinc, steel and masonry.
  • For bedding tiles, slates and flashing into position.
  • Joint sealing on gutters and down pipes.
  • Sticking down loose roofing felt.
  • Joint sealing between corrugated asbestos cement and iron sheeting etc.

Areas not for use:

  • On glass.
  • On uPVC.
  • Internally.

Surface preparation:

The surfaces to be must be clean and free from dust, grease and other conta­minants. New concrete or mortar should be allowed adequate time to dry and mature. May be applied to wet surfaces.


For lap joints, apply sufficient sealant to bridge the gap and press surfaces together while still tacky leaving a minimum 2mm sealant film.

Cut the tip of the cartridge taking care not to damage the thread. Apply nozzle and cut cleanly at an angle of 45degrees, with an opening slightly larger than the gap to be sealed. Apply using a standard sealant gun. Best results will be obtained by keeping an even pressure on the gun trigger and keeping the gun at a constant angle to the surface being sealed. To ensure a proper bond, always smooth the sealant down using a spatula or piece of wood wetted with linseed oil or white spirits. An improved joint appearance can be achieved by placing masking tape to both sides of the joint, removing within 5minutes of application.

When using as an adhesive, press surfaces together, pull apart and wait for approx. 10minutes until sealant becomes tacky, then press together and apply even pressure.

Clean tools in turps or white spirits.

Health & Safety

Flammable. Contains white spirits. Avoid all sources of ignition when using. Do not smoke. Wash the material from the skin while still wet. Material in contact with the eyes should be washed out immediately with water. Seek medical advice if discomfort persists. Avoid unnecessary skin contact. Remove with soap and water.

There are no reviews yet.

Write a review

    Overall satisfaction
    Value for money
    Ease of use

Area Covered

Deliveries can be made throughout most of Lancashire, appro­ximately 20 miles radius from our depot at Accrington, Lancashire.

Other locations may also be arranged for direct loads from our suppliers e.g. full loads of bricks or blocks.

Vehicle Types

We operate 3 crane offload vehicles:

  • Our smallest vehicle can carry approx 5 ton.
  • Our middle sized vehicle can carry approx 7.0 ton and has a tipping facility for loose sand and aggregates.
  • Our largest vehicle can carry approx 8.0 ton and also has a tipper facility.


Pricing will vary depending on the goods required and distance travelled.

We can offer very competitive rates for delivery — please contact us for more details.