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

Shop by category in Airtight & Windtight Systems

Airtight & Windtight Membranes

Airtight & Windtight Membranes

View collection
Airtight and windtight systems | Insulation Merchant

Airtight & Windtight Tapes and Sealants

View collection

Liquid Airtight Membranes

View collection
Airtight Grommets

Airtight Grommets

View collection

Expanding Tapes

View collection
Pro Clima

Pro Clima

View collection
SIGA

SIGA

View collection
Clear all filters

Showing 122 of 122 products

Sort by:
Brand Reset
Product type Reset
Thermal Conductivity Reset
Price Reset
Price: 0 – £764.35
Filter and sort

Filter and sort

Showing 122 of 122 products

Brand
Clear
Product type
Clear
Thermal Conductivity
Clear
Price

Up to £764.35

Clear
Clear all filters
Clear all filters
Showing 122 of 122 products
  • 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
    £1.09 per LM (linear metre)
    £22.88 ex. VAT
    £0.92 per LM (linear metre)
    £27.45
    £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
    £2.01 per LM (linear metre)
    £50.33 ex. VAT
    £1.68 per LM (linear metre)
    £60.40
    £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
    From £16.58 ex. VAT
    From £19.90
    £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
    £0.32 per LM (linear metre)
    £21.92 ex. VAT
    £0.27 per LM (linear metre)
    £26.30
    £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
    £3.49 per ea
    £29.08 ex. VAT
    £2.91 per ea
    £34.90
    £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
    £1.13 per LM (linear metre)
    £37.96 ex. VAT
    £0.95 per LM (linear metre)
    £45.55
    £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
    £17.75 ex. VAT
    £21.30
    £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
    £2.96 per ea
    £37.08 ex. VAT
    £2.47 per ea
    £44.50
    £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
    £2.63 per LM (linear metre)
    £65.75 ex. VAT
    £2.19 per LM (linear metre)
    £78.90
    £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
    £0.76 per LM (linear metre)
    £31.75 ex. VAT
    £0.64 per LM (linear metre)
    £38.10
    £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
    £5.07 per m²
    £317.42 ex. VAT
    £4.23 per m²
    £380.90
    £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
    £3.11 per m²
    £194.75 ex. VAT
    £2.60 per m²
    £233.70
    £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
    £4.61 per LM (linear metre)
    £76.92 ex. VAT
    £3.85 per LM (linear metre)
    £92.30
    £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
    £38.00 ex. VAT
    £45.60
    £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
    £4.23 per m²
    £264.71 ex. VAT
    £3.53 per m²
    £317.65
    £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
    £50.33 ex. VAT
    £60.40
    £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
    £1.67 per LM (linear metre)
    £34.83 ex. VAT
    £1.39 per LM (linear metre)
    £41.80
    £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
    From £8.67 ex. VAT
    From £10.40
    £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
    £2.21 per LM (linear metre)
    £55.33 ex. VAT
    £1.84 per LM (linear metre)
    £66.40
    £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
    £4.87 per m²
    £304.67 ex. VAT
    £4.06 per m²
    £365.60
    £4.87 per m²
    £368.16 you save £2.56
    £304.67 ex. VAT
    £4.06 per m²
    £306.80 you save £2.13