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Seal It Roof Seal

Quickly and easily repair flat roof leaks with the Seal It Roof Seal Liquid Membrane System.

The Roof Seal range from Seal It is a modern alternative to GRP, PU, silicone and bitumen roofs. It is ideal for repairing flat roofs, pitch roofs (with pitch less than 10°), leaking flashing, guttering, downpipes and roof lights plus much more.

Roof Seal Liquid Membrane is an easy-to-apply, one coat roof sealer, ideal for use on all existing substrates. Solvent-free and non-flammable, it is an excellent alternative to bitumen based and GRP roofing membranes. Roof Seal offers outstanding water resistance and weather proofing, and is also self-levelling, gap-bridging, non-shrinking and non-cracking. It can even be applied in the wet!

At Selco, we stock the complete Seal It Roof Seal range, including grey Roof Seal Liquid Membrane, Bleed Blocker Roof Primer, Cracks & Edging Sealer and Reinforcing Mat. Buy Seal It Roof Seal in branch at your local Selco or online with Click & Collect and next day delivery available.

Why choose Roof Seal?

Formulated using advanced hybrid technology, Seal It Roof Seal offers a whole range of benefits:

  • High elasticity under varying weather conditions – will not harden, soften or crack under extreme temperatures
  • Excellent resistance to ageing, UV, and discolouration
  • Outstanding thermal properties help reduce energy costs
  • Easy application with a brush, roller, spatula, trowel, squeegee or sprayed to a thickness of 1mm to 2mm
  • Adheres to various building substrates
  • Primerless adhesion to most substrates (primer required on existing bitumen / asphalt)
  • Solvent-free and non-flammable
  • Can be used in all weather conditions, even in the rain
  • Capable of resisting heavy rain 3 hours after application
  • Long-lasting flexibility
  • Resistant to chemical attack
  • Neutral cure, so won’t react with metals such as lead
  • Guaranteed to last up to 25 years

Shop the Seal It range


How to apply Seal It Roof Seal Liquid Membrane



Seal It Roof Seal can be used to repair pitch roofs (with pitch less than 100), leaking flashing, guttering, downpipes and rooflights, cracked roofing panels, chimney stacks, corrugated and plate roofing materials, zinc, steel, fibre-cement, ventilation ducts and facades. It can be used on metal, wood, brick, stone, polyester, glass, lead, bitumen coatings (primer required), tile, plastics, polycarbonate and concrete.

1 litre of Seal It Liquid Membrane will cover approximately 1m² at 1mm thickness.

You can find out more information about Roof Seal, including the ultimate guide on how to fix a leaking roof, by visiting the Seal It website.


If the roof you're covering is bitumen based or covered in roofing felt, then primer is required to provide a key for the membrane. Seal It Bleed Blocker Roof Primer is designed to enhance the bond strength of the top coat. It is quick and easy to apply and prevents bitumen coatings from staining through the top coat.

Seal It Edging & Crack Sealant can be used to seal irregular gaps, minor tears and blisters. For sealing larger gaps, we recommend using Seal It Reinforcing Mat as a sandwich layer to fill holes. This sealant can also be used after application to secure edgings or seals around chimneys and air vents.

Use Seal It Reinforcing Mat as a sandwich layer to increase the strength of the final coating. This will provide more than 50% strength improvement when the product has cured. This reinforcing mat will also reinforce areas where splits may occur, where there are penetrations to the surface or where you may need to make a seam or a joint.


Find all your roofing supplies at Selco

Seal It is a subsidiary of Bond It, a manufacturer of high performance building chemicals, such as sealants, adhesives, grouts, cleaners, expanding foams and fillers. At Selco, we stock a full range of Bond It products to buy in-branch or order online with Click & Collect and next day delivery. You can also find all the roofing supplies you need, including waterproofing systems, roofing felt and felt adhesive.

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