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. 

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Airtight & Windtight Systems

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  • SIGA Dockskin® 200 Mineral Surface Primer - 1kg bottle | Insulation Merchant SIGA Dockskin® 200 Mineral Surface Primer - 1kg bottle | Insulation Merchant
    Spring Savings
    DOCKSKIN® by SIGA

    SIGA Dockskin® 200 Mineral Surface Primer - 1kg bottle

    £41.45 inc. VAT
    £34.54 ex. VAT
    £41.45 inc. VAT
    Save £-41.45
    £34.54 ex. VAT
    £0.00 Save £-34.54
  • Pro Clima Extoseal Encors - 300mm x 20m | Insulation Merchant Pro Clima Extoseal Encors - 300mm x 20m | Insulation Merchant
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    EXTOSEAL by Pro Clima

    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 Save £7.50
    £230.75 ex. VAT
    £11.54 per LM (linear metre)
    £237.00 Save £6.25
  • Pro Clima Contega Solido EXO100 (External Single-sIded Corner Adhesive Tape) - 30m x 100mm | Insulation Merchant Pro Clima Contega Solido EXO100 (External Single-sIded Corner Adhesive Tape) - 30m x 100mm | Insulation Merchant
    CONTEGA SOLIDO EXO by Pro Clima

    Pro Clima Contega Solido EXO200 (External Single-sIded Corner Adhesive Tape) - 30m x 200mm

    £121.03 inc. VAT
    £100.86 ex. VAT
    £121.03 inc. VAT
    Save £-121.03
    £100.86 ex. VAT
    £0.00 Save £-100.86
  • Pro Clima Aerosanna Fleece | Insulation Merchant pro clima | Insulation Merchant
    Sale 5%
    AEROSANA FLEECE by Pro Clima

    Pro Clima Aerosanna Fleece

    £17.67 inc. VAT
    £0.70 per LM (linear metre)
    £14.73 ex. VAT
    £0.59 per LM (linear metre)
    £17.67 inc. VAT
    £0.70 per LM (linear metre)
    £18.60 Save £0.93
    £14.73 ex. VAT
    £0.59 per LM (linear metre)
    £15.50 Save £0.78
  • Pro Clima Contega Solido EXO-D80 (External Double-sIded Corner Adhesive Tape) - 30m x 80mm | Insulation Merchant Pro Clima Contega Solido EXO-D80 (External Double-sIded Corner Adhesive Tape) - 30m x 80mm | Insulation Merchant
    Sale 5%
    CONTEGA SOLIDO EXO-D by Pro Clima

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

    £64.75 inc. VAT
    £2.15 per LM (linear metre)
    £53.96 ex. VAT
    £1.80 per LM (linear metre)
    £64.75 inc. VAT
    £2.15 per LM (linear metre)
    £68.16 Save £3.41
    £53.96 ex. VAT
    £1.80 per LM (linear metre)
    £56.80 Save £2.84
  • SIGA Fentrim® 330 Grey Adhesive Tape - 150mm | Insulation Merchant SIGA Fentrim® 330 Grey Adhesive Tape - 150mm | Insulation Merchant
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    FENTRIM® 330 GREY by SIGA

    SIGA Fentrim® 330 Grey Adhesive Tape - 150mm

    £169.15 inc. VAT
    £6.76 per LM (linear metre)
    £140.96 ex. VAT
    £5.64 per LM (linear metre)
    £169.15 inc. VAT
    £6.76 per LM (linear metre)
    Save £-169.15
    £140.96 ex. VAT
    £5.64 per LM (linear metre)
    £0.00 Save £-140.96
  • SIGA Dockskin® 100 Fibrous Surface Primer - 1kg bottle | Insulation Merchant-1kg SIGA Dockskin® 100 Fibrous Surface Primer - 1kg bottle | Insulation Merchant
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    DOCKSKIN® by SIGA

    SIGA Dockskin® 100 Fibrous Surface Primer - 1kg bottle

    £30.15 inc. VAT
    £25.13 ex. VAT
    £30.15 inc. VAT
    Save £-30.15
    £25.13 ex. VAT
    £0.00 Save £-25.13
  • SIGA Majcoat® 150 SOB Breather Membrane - 1.5m x 50m | Insulation Merchant SIGA Majcoat® 150 SOB Breather Membrane - 1.5m x 50m | Insulation Merchant
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    MAJCOAT® 150 by SIGA

    SIGA Majcoat® 150 SOB Breather Membrane - 1.5m x 50m

    £240.00 inc. VAT
    £3.20 per m²
    £200.00 ex. VAT
    £2.67 per m²
    £240.00 inc. VAT
    £3.20 per m²
    Save £-240.00
    £200.00 ex. VAT
    £2.67 per m²
    £0.00 Save £-200.00
  • SIGA Fentrim® 2 50/85 (Pre-folded External Corner Tape) - 25m | Insulation Merchant SIGA Fentrim® 2 50/85 (Pre-folded External Corner Tape) - 25m | Insulation Merchant
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    FENTRIM® 2 by SIGA

    SIGA Fentrim® 2 50/85 (Pre-folded External Corner Tape) - 25m

    £88.80 inc. VAT
    £3.55 per LM (linear metre)
    £74.00 ex. VAT
    £2.96 per LM (linear metre)
    £88.80 inc. VAT
    £3.55 per LM (linear metre)
    Save £-88.80
    £74.00 ex. VAT
    £2.96 per LM (linear metre)
    £0.00 Save £-74.00
  • SIGA Majcoat® 350 Diffusion-open Breathable Roof Membrane | Insulation Merchant SIGA Majcoat® 350 Diffusion-open Breathable Roof Membrane | Insulation Merchant
    Sale 6%
    Spring Savings
    Bat Friendly
    MAJCOAT® 350 by SIGA

    SIGA Majcoat® 350 Diffusion-open Breathable "Bat-friendly" Roof Membrane

    £549.45 inc. VAT
    £10.97 per m²
    £457.88 ex. VAT
    £9.14 per m²
    £549.45 inc. VAT
    £10.97 per m²
    £588.00 Save £38.55
    £457.88 ex. VAT
    £9.14 per m²
    £490.00 Save £32.13
  • SIGA Tape Dispenser | Insulation Merchant SIGA Tape Dispenser | Insulation Merchant
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    TAPE DISPENSER by SIGA

    SIGA Tape Dispenser

    £26.10 inc. VAT
    £21.75 ex. VAT
    £26.10 inc. VAT
    Save £-26.10
    £21.75 ex. VAT
    £0.00 Save £-21.75
  • Pro Clima Contega Solido EXO-D100 (External Double-sIded Corner Adhesive Tape) - 30m x 100mm | Insulation Merchant Pro Clima Contega Solido EXO-D100 (External Double-sIded Corner Adhesive Tape) - 30m x 100mm | Insulation Merchant
    Sale 5%
    CONTEGA SOLIDO EXO-D by Pro Clima

    Pro Clima Contega Solido EXO-D100 (External Double-sIded Corner Adhesive Tape) - 30m x 100mm

    £77.50 inc. VAT
    £2.58 per LM (linear metre)
    £64.58 ex. VAT
    £2.15 per LM (linear metre)
    £77.50 inc. VAT
    £2.58 per LM (linear metre)
    £81.60 Save £4.10
    £64.58 ex. VAT
    £2.15 per LM (linear metre)
    £68.00 Save £3.42
  • SIGA Primur Roll (Flexible Membrane Seal) | Insulation Merchant
    Spring Savings
    PRIMUR by SIGA

    SIGA Primur Roll (Flexible Membrane Seal)

    £21.00 inc. VAT
    £2.62 per LM (linear metre)
    £17.50 ex. VAT
    £2.19 per LM (linear metre)
    £21.00 inc. VAT
    £2.62 per LM (linear metre)
    Save £-21.00
    £17.50 ex. VAT
    £2.19 per LM (linear metre)
    £0.00 Save £-17.50
  • SIGA | Insulation Merchant
    Spring Savings
    Internal Use
    FENTRIM® 20 by SIGA

    SIGA Fentrim® 20 (Pre-folded Internal Corner Tape) - All sizes

    From £65.60 inc. VAT
    £2.62 per LM (linear metre)
    From £54.67 ex. VAT
    £2.19 per LM (linear metre)
    From £65.60 inc. VAT
    £2.62 per LM (linear metre)
    Save £-65.60
    From £54.67 ex. VAT
    £2.19 per LM (linear metre)
    £0.00 Save £-54.67
  • SIGA Majvest® 500 SA - Self-Adhesive Facade Membrane (1.52m x 30.5m) | Insulation Merchant SIGA Majvest® 500 SA - Self-Adhesive Facade Membrane (1.52m x 30.5m) | Insulation Merchant
    Spring Savings
    MAJVEST® 500 SA by SIGA

    SIGA Majvest® 500 SA - Self-Adhesive Facade Membrane (1.52m x 30.5m)

    £575.95 inc. VAT
    £12.43 per m²
    £479.96 ex. VAT
    £10.36 per m²
    £575.95 inc. VAT
    £12.43 per m²
    Save £-575.95
    £479.96 ex. VAT
    £10.36 per m²
    £0.00 Save £-479.96
  • SIGA Wetguard® 200 SA - 780mm x 50m | Insulation Merchant SIGA Wetguard® 200 SA - 780mm x 50m | Insulation Merchant
    Spring Savings
    WETGUARD® by SIGA

    SIGA Wetguard® 200 SA - 780mm x 50m

    £382.25 inc. VAT
    £9.80 per m²
    £318.54 ex. VAT
    £8.17 per m²
    £382.25 inc. VAT
    £9.80 per m²
    Save £-382.25
    £318.54 ex. VAT
    £8.17 per m²
    £0.00 Save £-318.54
  • SIGA Sicrall® 170 VCL and Jointing Airtight Tape | Insulation Merchant SIGA Sicrall® 170 VCL and Jointing Airtight Tape | Insulation Merchant
    Spring Savings
    SICRALL® by SIGA

    SIGA Sicrall® 170 VCL and Jointing Airtight Tape

    £116.90 inc. VAT
    £2.92 per LM (linear metre)
    £97.42 ex. VAT
    £2.44 per LM (linear metre)
    £116.90 inc. VAT
    £2.92 per LM (linear metre)
    Save £-116.90
    £97.42 ex. VAT
    £2.44 per LM (linear metre)
    £0.00 Save £-97.42
  • SIGA Dockskin® 100 Fibrous Surface Primer - 4kg tub | Insulation Merchant SIGA Dockskin® 100 Fibrous Surface Primer - 4kg tub | Insulation Merchant
    Spring Savings
    DOCKSKIN® by SIGA

    SIGA Dockskin® 100 Fibrous Surface Primer - 4kg tub

    £102.70 inc. VAT
    £85.58 ex. VAT
    £102.70 inc. VAT
    Save £-102.70
    £85.58 ex. VAT
    £0.00 Save £-85.58
  • Siga Knife & Ruler Set | Insulation Merchant Siga Knife & Ruler Set | Insulation Merchant
    Spring Savings
    by SIGA

    Siga Knife & Ruler Set

    £25.00 inc. VAT
    £20.83 ex. VAT
    £25.00 inc. VAT
    Save £-25.00
    £20.83 ex. VAT
    £0.00 Save £-20.83
  • SIGA Primur® Tubular Bag Bonding Adhesive (600ml) | Insulation Merchant SIGA Primur® Tubular Bag Bonding Adhesive (600ml) | Insulation Merchant
    Spring Savings
    PRIMUR® by SIGA

    SIGA Primur® Tubular Bag Bonding Adhesive (600ml)

    £23.70 inc. VAT
    £39.50 per litres
    £19.75 ex. VAT
    £32.92 per litres
    £23.70 inc. VAT
    £39.50 per litres
    Save £-23.70
    £19.75 ex. VAT
    £32.92 per litres
    £0.00 Save £-19.75