Airtight & Windtight Systems

Airtightness and Widtightness are essential aspects to consider when building or renovating. Air leakage into and out of a property can be detrimental to the thermal performance of insulation. Creating an airtight seal in the property helps minimize heat loss or gain and eliminates drafts ensuring a consistent indoor temperature. It also helps eliminate the entry of pollutants, allergens, and moisture, resulting in a healthier indoor environment. 

Shop our range of airtight membranes, tapes, grommets, and sealants.

Airtight and windtight systems | Insulation Merchant

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Airtight & Windtight Membranes

Airtight & Windtight Membranes

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Airtight and windtight systems | Insulation Merchant

Airtight & Windtight Tapes and Sealants

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Liquid Airtight Membranes

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Airtight Grommets

Airtight Grommets

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Pro Clima

Pro Clima

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SIGA

SIGA

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  • Pro Clima Aerosanna Visconn Fibre-reinforced Spray/Paintable Airtight Sealant Membrane
    Sale 83%
    AEROSANA VISCONN FIBRE by Pro Clima

    PC/AVF5B

    Pro Clima Aerosanna Visconn Fibre-reinforced Spray/Paintable Airtight Sealant Membrane

    From £14.05 inc. VAT
    From £11.71 ex. VAT
    From £14.05 inc. VAT
    £86.88 you save £72.83
    From £11.71 ex. VAT
    £72.40 you save £60.69
  • SIGA Primur® Cartridge Bonding Adhesive (310ml) SIGA Primur® Cartridge Bonding Adhesive (310ml)
    PRIMUR® by SIGA

    SIG/PC

    SIGA Primur® Cartridge Bonding Adhesive (310ml)

    £12.75 inc. VAT
    £41.13 per litres
    £10.63 ex. VAT
    £34.27 per litres
    £12.75 inc. VAT
    £41.13 per litres
    you save £-12.75
    £10.63 ex. VAT
    £34.27 per litres
    £0.00 you save £-10.63
  • SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²) SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²)
    MAJCOAT® 150 by SIGA

    SIG/MC150-15

    SIGA Majcoat® 150 Breather Membrane - 1.5m x 50m (75m²)

    £220.90 inc. VAT
    £2.94 per m²
    £184.08 ex. VAT
    £2.45 per m²
    £220.90 inc. VAT
    £2.94 per m²
    you save £-220.90
    £184.08 ex. VAT
    £2.45 per m²
    £0.00 you save £-184.08
  • Pro Clima Roflex Solido 100 - Airtight Pipe Grommet (Pack of 6) Pro Clima Roflex Solido 100 - Airtight Pipe Grommet (Pack of 6)
    ROFLEX SOLIDO by Pro Clima

    PC/RS100

    Pro Clima Roflex Solido 100 - Airtight Pipe Grommet (Pack of 6)

    £38.65 inc. VAT
    £6.44 per ea
    £32.21 ex. VAT
    £5.37 per ea
    £38.65 inc. VAT
    £6.44 per ea
    you save £-38.65
    £32.21 ex. VAT
    £5.37 per ea
    £0.00 you save £-32.21
  • Pro Clima Stoppa - 20mm (20 per pack)
    Sale 7%
    STOPPA by Pro Clima

    PC/S20-20

    Pro Clima Stoppa - 20mm (20 per pack)

    £19.20 inc. VAT
    £0.96 per ea
    £16.00 ex. VAT
    £0.80 per ea
    £19.20 inc. VAT
    £0.96 per ea
    £20.76 you save £1.56
    £16.00 ex. VAT
    £0.80 per ea
    £17.30 you save £1.30
  • Pro Clima Orcon Multibond - Membrane Adhesive Strip Roll (Pack of 2) Pro Clima Orcon Multibond - Membrane Adhesive Strip Roll (Pack of 2)
    Sale 4%
    ORCON by Pro Clima

    PC/ORCM

    Pro Clima Orcon Multibond - Membrane Adhesive Strip Roll (Pack of 2)

    £56.00 inc. VAT
    £2.80 per LM (linear metre)
    £46.67 ex. VAT
    £2.33 per LM (linear metre)
    £56.00 inc. VAT
    £2.80 per LM (linear metre)
    £58.92 you save £2.92
    £46.67 ex. VAT
    £2.33 per LM (linear metre)
    £49.10 you save £2.43
  • SIGA Wetguard® 200 SA - 390mm x 50m SIGA Wetguard® 200 SA - 390mm x 50m
    WETGUARD® by SIGA

    SIG/WG200S-39

    SIGA Wetguard® 200 SA - 390mm x 50m

    £202.70 inc. VAT
    £10.39 per m²
    £168.92 ex. VAT
    £8.66 per m²
    £202.70 inc. VAT
    £10.39 per m²
    you save £-202.70
    £168.92 ex. VAT
    £8.66 per m²
    £0.00 you save £-168.92
  • Pro Clima Stoppa - 16mm (20 per pack)
    Sale 5%
    STOPPA by Pro Clima

    PC/S16-20

    Pro Clima Stoppa - 16mm (20 per pack)

    £18.50 inc. VAT
    £15.42 ex. VAT
    £18.50 inc. VAT
    £19.56 you save £1.06
    £15.42 ex. VAT
    £16.30 you save £0.88
  • Pro Clima Solitex Fronta WA - Wall Lining Membrane (3m x 50m) Pro Clima Solitex Fronta WA - Wall Lining Membrane (3m x 50m)
    SOLITEX FRONTA WA by Pro Clima

    PC/FWA30050

    Pro Clima Solitex Fronta WA - Wall Lining Membrane (3m x 50m)

    £339.90 inc. VAT
    £283.25 ex. VAT
    £339.90 inc. VAT
    you save £-339.90
    £283.25 ex. VAT
    £0.00 you save £-283.25
  • Pro Clima Roflex Solido 50 - Airtight Pipe Grommet (Pack of 6) Pro Clima Roflex Solido 50 - Airtight Pipe Grommet (Pack of 6)
    ROFLEX SOLIDO by Pro Clima

    PC/RS50

    Pro Clima Roflex Solido 50 - Airtight Pipe Grommet (Pack of 6)

    £27.94 inc. VAT
    £4.65 per ea
    £23.28 ex. VAT
    £3.88 per ea
    £27.94 inc. VAT
    £4.65 per ea
    you save £-27.94
    £23.28 ex. VAT
    £3.88 per ea
    £0.00 you save £-23.28
  • SIGA Majvest® 200 SOB - Breather Membrane with Tape (Particularly for Closed Facade) SIGA Majvest® 200 SOB - Breather Membrane with Tape (Particularly for Closed Facade)
    MAJVEST® 200 SOB by SIGA

    SIG/MV200S

    SIGA Majvest® 200 SOB - Breather Membrane with Tape (Particularly for Closed Facade)

    £218.65 inc. VAT
    £2.91 per m²
    £182.21 ex. VAT
    £2.43 per m²
    £218.65 inc. VAT
    £2.91 per m²
    you save £-218.65
    £182.21 ex. VAT
    £2.43 per m²
    £0.00 you save £-182.21
  • Pro Clima Glumex - Adhesive Remover (400ml)
    Sale 5%
    GLUMEX by Pro Clima

    PC/GLU

    Pro Clima Glumex - Adhesive Remover (400ml)

    £11.85 inc. VAT
    £9.88 ex. VAT
    £11.85 inc. VAT
    £12.48 you save £0.63
    £9.88 ex. VAT
    £10.40 you save £0.53
  • SIGA Wigluv® 150 External Adhesive Tape - (150mm x 25m) SIGA Wigluv® 150 External Adhesive Tape - (150mm x 25m)
    WIGLUV® 150 by SIGA

    SIG/WL150

    SIGA Wigluv® 150 External Adhesive Tape - (150mm x 25m)

    £81.95 inc. VAT
    £3.27 per LM (linear metre)
    £68.29 ex. VAT
    £2.73 per LM (linear metre)
    £81.95 inc. VAT
    £3.27 per LM (linear metre)
    you save £-81.95
    £68.29 ex. VAT
    £2.73 per LM (linear metre)
    £0.00 you save £-68.29
  • SIGA Fentrim® 2 (Pre-folded External Corner Tape) - All sizes
    External Use
    FENTRIM® 2 by SIGA

    SIG/F2100

    SIGA Fentrim® 2 (Pre-folded External Corner Tape) - All sizes

    From £67.05 inc. VAT
    £2.68 per LM (linear metre)
    From £55.88 ex. VAT
    £2.24 per LM (linear metre)
    From £67.05 inc. VAT
    £2.68 per LM (linear metre)
    you save £-67.05
    From £55.88 ex. VAT
    £2.24 per LM (linear metre)
    £0.00 you save £-55.88
  • Pro Clima Solitex Fronta Humida - Wall Lining Membrane (1.5m x 50m) Pro Clima Solitex Fronta Humida - Wall Lining Membrane (1.5m x 50m)
    SOLITEX FRONTA HUMIDA by Pro Clima

    PC/FH15050

    Pro Clima Solitex Fronta Humida - Wall Lining Membrane (1.5m x 50m)

    £268.90 inc. VAT
    £3.58 per m²
    £224.08 ex. VAT
    £2.99 per m²
    £268.90 inc. VAT
    £3.58 per m²
    you save £-268.90
    £224.08 ex. VAT
    £2.99 per m²
    £0.00 you save £-224.08
  • SIGA Farmer Waterproof High Performance Multi-purpose Tape - 60mm x 15m SIGA Farmer Waterproof High Performance Multi-purpose Tape - 60mm x 15m
    FARMER by SIGA

    SIGA/F60

    SIGA Farmer Waterproof High Performance Multi-purpose Tape - 60mm x 15m

    £20.90 inc. VAT
    £1.39 per LM (linear metre)
    £17.42 ex. VAT
    £1.16 per LM (linear metre)
    £20.90 inc. VAT
    £1.39 per LM (linear metre)
    you save £-20.90
    £17.42 ex. VAT
    £1.16 per LM (linear metre)
    £0.00 you save £-17.42
  • SIGA Wetguard® 200 SA - 1560mm x 50m SIGA Wetguard® 200 SA - 1560mm x 50m
    WETGUARD® by SIGA

    SIG/WG200S-156

    SIGA Wetguard® 200 SA - 1560mm x 50m

    £764.35 inc. VAT
    £9.79 per m²
    £636.96 ex. VAT
    £8.17 per m²
    £764.35 inc. VAT
    £9.79 per m²
    you save £-764.35
    £636.96 ex. VAT
    £8.17 per m²
    £0.00 you save £-636.96
  • Pro Clima Solitex Adhero 3000 - Self Adhesive Vapour Permeable Membrane (1.5m X 30m) Pro Clima Solitex Adhero 3000 - Self Adhesive Vapour Permeable Membrane (1.5m X 30m)
    SOLITEX by Pro Clima

    PC/SEA

    Pro Clima Solitex Adhero 3000 - Self Adhesive Vapour Permeable Membrane (1.5m X 30m)

    £414.48 inc. VAT
    £9.21 per m²
    £345.40 ex. VAT
    £7.68 per m²
    £414.48 inc. VAT
    £9.21 per m²
    you save £-414.48
    £345.40 ex. VAT
    £7.68 per m²
    £0.00 you save £-345.40
  • SIGA Dockskin® 200 Mineral Surface Primer - 1kg bottle SIGA Dockskin® 200 Mineral Surface Primer - 1kg bottle
    DOCKSKIN® by SIGA

    SIG/DS200-1

    SIGA Dockskin® 200 Mineral Surface Primer - 1kg bottle

    £40.25 inc. VAT
    £33.54 ex. VAT
    £40.25 inc. VAT
    you save £-40.25
    £33.54 ex. VAT
    £0.00 you save £-33.54
  • Pro Clima Extoseal Encors - 300mm x 20m Pro Clima Extoseal Encors - 300mm x 20m
    Sale 2%
    EXTOSEAL by Pro Clima

    PC/ENCORS300

    Pro Clima Extoseal Encors - 300mm x 20m

    £276.90 inc. VAT
    £13.84 per LM (linear metre)
    £230.75 ex. VAT
    £11.54 per LM (linear metre)
    £276.90 inc. VAT
    £13.84 per LM (linear metre)
    £284.40 you save £7.50
    £230.75 ex. VAT
    £11.54 per LM (linear metre)
    £237.00 you save £6.25