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

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  • SIGA Rissan® 60 VCL & Jointing Airtightness Tape - 60mm x 25m SIGA Rissan® 60 VCL & Jointing Airtightness Tape - 60mm x 25m
    RISSAN® 60 by SIGA

    SIG/R60

    SIGA Rissan® 60 VCL & Jointing Airtightness Tape - 60mm x 25m

    £27.45 inc. VAT
    £1.09 per LM (linear metre)
    £22.88 ex. VAT
    £0.92 per LM (linear metre)
    £27.45 inc. VAT
    £1.09 per LM (linear metre)
    you save £-27.45
    £22.88 ex. VAT
    £0.92 per LM (linear metre)
    £0.00 you save £-22.88
  • Pro Clima Contega Solido SL100 (Internal Single-sIded Corner Adhesive Tape) - 100mm x 30m Pro Clima Contega Solido SL100 (Internal Single-sIded Corner Adhesive Tape) - 100mm x 30m
    Sale 2%
    CONTEGA SOLIDO SL by Pro Clima

    PC/SOLSL100

    Pro Clima Contega Solido SL100 (Internal Single-sIded Corner Adhesive Tape) - 100mm x 30m

    £60.40 inc. VAT
    £2.01 per LM (linear metre)
    £50.33 ex. VAT
    £1.68 per LM (linear metre)
    £60.40 inc. VAT
    £2.01 per LM (linear metre)
    £62.04 you save £1.64
    £50.33 ex. VAT
    £1.68 per LM (linear metre)
    £51.70 you save £1.37
  • Pro Clima Compego Tape
    Sale 9%
    COMPEGO by Pro Clima

    PC/COM6025

    Pro Clima Compego Tape

    From £19.90 inc. VAT
    From £16.58 ex. VAT
    From £19.90 inc. VAT
    £21.96 you save £2.06
    From £16.58 ex. VAT
    £18.30 you save £1.72
  • 80m Pro Clima Duplex Double Sided Membrane Tape 80m Pro Clima Duplex Double Sided Membrane Tape
    Sale 2%
    DUPLEX by Pro Clima

    PC/DD80

    80m Pro Clima Duplex Double Sided Membrane Tape

    £26.30 inc. VAT
    £0.32 per LM (linear metre)
    £21.92 ex. VAT
    £0.27 per LM (linear metre)
    £26.30 inc. VAT
    £0.32 per LM (linear metre)
    £27.00 you save £0.70
    £21.92 ex. VAT
    £0.27 per LM (linear metre)
    £22.50 you save £0.58
  • Pro Clima Kaflex Post - Retrofit Airtight Cable Grommet (Pack of 10) Pro Clima Kaflex Post - Retrofit Airtight Cable Grommet (Pack of 10)
    Sale 1%
    KAFLEX by Pro Clima

    PC/KP-10

    Pro Clima Kaflex Post - Retrofit Airtight Cable Grommet (Pack of 10)

    £34.90 inc. VAT
    £3.49 per ea
    £29.08 ex. VAT
    £2.91 per ea
    £34.90 inc. VAT
    £3.49 per ea
    £35.52 you save £0.62
    £29.08 ex. VAT
    £2.91 per ea
    £29.60 you save £0.52
  • SIGA Wigluv® 60 External Adhesive Tape (40m x 60mm) SIGA Wigluv® 60 External Adhesive Tape (40m x 60mm)
    WIGLUV® 60 by SIGA

    SIG/WL60

    SIGA Wigluv® 60 External Adhesive Tape (40m x 60mm)

    £45.55 inc. VAT
    £1.13 per LM (linear metre)
    £37.96 ex. VAT
    £0.95 per LM (linear metre)
    £45.55 inc. VAT
    £1.13 per LM (linear metre)
    you save £-45.55
    £37.96 ex. VAT
    £0.95 per LM (linear metre)
    £0.00 you save £-37.96
  • Pro Clima Tescon Naideck - Sealing Adhesive Tape (50mm x 20m) Pro Clima Tescon Naideck - Sealing Adhesive Tape (50mm x 20m)
    Sale 2%
    TESCON by Pro Clima

    PC/NAIDEC

    Pro Clima Tescon Naideck - Sealing Adhesive Tape (50mm x 20m)

    £21.30 inc. VAT
    £17.75 ex. VAT
    £21.30 inc. VAT
    £21.84 you save £0.54
    £17.75 ex. VAT
    £18.20 you save £0.45
  • Pro Clima Roflex 20 - Airtight Pipe Grommet (Pack of 15) Pro Clima Roflex 20 - Airtight Pipe Grommet (Pack of 15)
    Sale 12%
    ROFLEX by Pro Clima

    PC/R20-15

    Pro Clima Roflex 20 - Airtight Pipe Grommet (Pack of 15)

    £44.50 inc. VAT
    £2.96 per ea
    £37.08 ex. VAT
    £2.47 per ea
    £44.50 inc. VAT
    £2.96 per ea
    £50.76 you save £6.26
    £37.08 ex. VAT
    £2.47 per ea
    £42.30 you save £5.22
  • 150mm Pro Clima Tescon Vana - Sealing Adhesive Tape (30m) | Insulation Merchant 150mm Pro Clima Tescon Vana - Sealing Adhesive Tape (30m) | Insulation Merchant
    Sale 2%
    TESCON by Pro Clima

    PC/TV-15

    150mm Pro Clima Tescon Vana - Sealing Adhesive Tape (30m)

    £78.90 inc. VAT
    £2.63 per LM (linear metre)
    £65.75 ex. VAT
    £2.19 per LM (linear metre)
    £78.90 inc. VAT
    £2.63 per LM (linear metre)
    £80.88 you save £1.98
    £65.75 ex. VAT
    £2.19 per LM (linear metre)
    £67.40 you save £1.65
  • SIGA Twinet® 20 VCL Mounting Tape SIGA Twinet® 20 VCL Mounting Tape
    TWINET® by SIGA

    SIG/T20

    SIGA Twinet® 20 VCL Mounting Tape

    £38.10 inc. VAT
    £0.76 per LM (linear metre)
    £31.75 ex. VAT
    £0.64 per LM (linear metre)
    £38.10 inc. VAT
    £0.76 per LM (linear metre)
    you save £-38.10
    £31.75 ex. VAT
    £0.64 per LM (linear metre)
    £0.00 you save £-31.75
  • SIGA Majrex® 200 (1-directional) Airtight Humidity Vapour Control Layer - 1.5 x 50m (75m²) SIGA Majrex® 200 (1-directional) Airtight Humidity Vapour Control Layer - 1.5 x 50m (75m²)
    MAJREX® by SIGA

    SIG/MR200

    SIGA Majrex® 200 (1-directional) Airtight Humidity Vapour Control Layer - 1.5 x 50m (75m²)

    £380.90 inc. VAT
    £5.07 per m²
    £317.42 ex. VAT
    £4.23 per m²
    £380.90 inc. VAT
    £5.07 per m²
    you save £-380.90
    £317.42 ex. VAT
    £4.23 per m²
    £0.00 you save £-317.42
  • SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²) SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²)
    MAJPELL® 5 VCL by SIGA

    SIG/MP5-15

    SIGA Majpell® 5 Vapour Control Layer - 1.5 x 50m (75m²)

    £233.70 inc. VAT
    £3.11 per m²
    £194.75 ex. VAT
    £2.60 per m²
    £233.70 inc. VAT
    £3.11 per m²
    you save £-233.70
    £194.75 ex. VAT
    £2.60 per m²
    £0.00 you save £-194.75
  • Pro Clima Extoseal Encors - 100mm x 20m Pro Clima Extoseal Encors - 100mm x 20m
    Sale 2%
    EXTOSEAL by Pro Clima

    PC/ENCORS100

    Pro Clima Extoseal Encors - 100mm x 20m

    £92.30 inc. VAT
    £4.61 per LM (linear metre)
    £76.92 ex. VAT
    £3.85 per LM (linear metre)
    £92.30 inc. VAT
    £4.61 per LM (linear metre)
    £94.80 you save £2.50
    £76.92 ex. VAT
    £3.85 per LM (linear metre)
    £79.00 you save £2.08
  • Pro Clima Kaflex Mono - Airtight Cable Grommet (Pack of 15) Pro Clima Kaflex Mono - Airtight Cable Grommet (Pack of 15)
    Sale 0%
    KAFLEX by Pro Clima

    PC/KM612-15

    Pro Clima Kaflex Mono - Airtight Cable Grommet (Pack of 15)

    £45.60 inc. VAT
    £38.00 ex. VAT
    £45.60 inc. VAT
    £45.84 you save £0.24
    £38.00 ex. VAT
    £38.20 you save £0.20
  • SIGA Majcoat® 200 SOB Diffusion Open Roof Breather Membrane - 1.5m x 50m SIGA Majcoat® 200 SOB Diffusion Open Roof Breather Membrane - 1.5m x 50m
    MAJCOAT® 200 by SIGA

    SIG/MC200S

    SIGA Majcoat® 200 SOB Diffusion Open Roof Breather Membrane - 1.5m x 50m

    £317.65 inc. VAT
    £4.23 per m²
    £264.71 ex. VAT
    £3.53 per m²
    £317.65 inc. VAT
    £4.23 per m²
    you save £-317.65
    £264.71 ex. VAT
    £3.53 per m²
    £0.00 you save £-264.71
  • Pro Clima Contega Solido EXO100 (External Single-sIded Corner Adhesive Tape) - 30m x 100mm Pro Clima Contega Solido EXO100 (External Single-sIded Corner Adhesive Tape) - 30m x 100mm
    Sale 2%
    CONTEGA SOLIDO EXO by Pro Clima

    PC/SOLEXO100

    Pro Clima Contega Solido EXO100 (External Single-sIded Corner Adhesive Tape) - 30m x 100mm

    £60.40 inc. VAT
    £50.33 ex. VAT
    £60.40 inc. VAT
    £62.04 you save £1.64
    £50.33 ex. VAT
    £51.70 you save £1.37
  • SIGA Wigluv® 20/40 Split External Adhesive Tape (60mm x 25m) SIGA Wigluv® 20/40 Split External Adhesive Tape (60mm x 25m)
    WIGLUV® 20/40 by SIGA

    SIG/WL2040

    SIGA Wigluv® 20/40 Split External Adhesive Tape (60mm x 25m)

    £41.80 inc. VAT
    £1.67 per LM (linear metre)
    £34.83 ex. VAT
    £1.39 per LM (linear metre)
    £41.80 inc. VAT
    £1.67 per LM (linear metre)
    you save £-41.80
    £34.83 ex. VAT
    £1.39 per LM (linear metre)
    £0.00 you save £-34.83
  • Pro Clima Aerosanna Visconn Spray/Paintable Airtight Sealant Membrane Pro Clima Aerosanna Visconn Spray/Paintable Airtight Sealant Membrane
    Sale 14%
    AEROSANA VISCONN by Pro Clima

    PC/AVB10L

    Pro Clima Aerosanna Visconn Spray/Paintable Airtight Sealant Membrane

    From £10.40 inc. VAT
    From £8.67 ex. VAT
    From £10.40 inc. VAT
    £12.12 you save £1.72
    From £8.67 ex. VAT
    £10.10 you save £1.43
  • Pro Clima Contega Solido SL-D80 (External Double-sIded Corner Adhesive Tape) - 80mm x 30m Pro Clima Contega Solido SL-D80 (External Double-sIded Corner Adhesive Tape) - 80mm x 30m
    Sale 2%
    CONTEGA SOLIDO SL-D by Pro Clima

    PC/SOLSLD80

    Pro Clima Contega Solido SL-D80 (External Double-sIded Corner Adhesive Tape) - 80mm x 30m

    £66.40 inc. VAT
    £2.21 per LM (linear metre)
    £55.33 ex. VAT
    £1.84 per LM (linear metre)
    £66.40 inc. VAT
    £2.21 per LM (linear metre)
    £68.16 you save £1.76
    £55.33 ex. VAT
    £1.84 per LM (linear metre)
    £56.80 you save £1.47
  • Pro Clima Solitex Fronta Quattro - Open Facade Membrane (1.5m x 50m) Pro Clima Solitex Fronta Quattro - Open Facade Membrane (1.5m x 50m)
    Sale 0%
    SOLITEX by Pro Clima

    PC/FQ

    Pro Clima Solitex Fronta Quattro - Open Facade Membrane (1.5m x 50m)

    £365.60 inc. VAT
    £4.87 per m²
    £304.67 ex. VAT
    £4.06 per m²
    £365.60 inc. VAT
    £4.87 per m²
    £368.16 you save £2.56
    £304.67 ex. VAT
    £4.06 per m²
    £306.80 you save £2.13