SteriLite SuperThermic

From £8.59 (per metre)

Out of stock

Out of stock

SKU: f9ae06c11f60-1-3-1-9-1-1


SteriLite SuperThermic Polythene

Another diffused cover which has the benefit of an additive which holds the infra-red rays in the tunnel, so retaining the heat for longer, the bigger the tunnel the more effective this becomes. Ideal where you are looking to extend the growing season and where heating the tunnel. For vegetables, flowers, soft fruit, shrubs and bedding plants. For all crops which are to be heated. For vegetables, flowers and nursery stock. For late in the year, overwintered, or early crops. For Organic soft fruit.

Use Sterilite SuperThermic for all crops which are heated and where the advantages of the UV blocking IPM will be advantageous, for example organic growing. Great for vegetables, especially salad crops.

UV blocking is proven to reduce fungal and aphid attacks and give a greater foliage area. Specially designed to block the lower end of the light spectrum, aphids can’t see to fly and won’t colonise and botrytis and mildew are short-lived without the correct light.

Reflective properties of polythene can keep the tunnel up to 10% cooler than a clear polythene


Prices are per metre.

Cutting charges apply as follows: 5-10m length = £20, 11-19m = £10, 20m and above = £0.

Please note that certain ranges have limited roll widths available. This may mean you need to buy a larger width which may result in an excess of material. Always choose a roll width which is larger than your cover width requirements.

Unsure what size polythene you need? Use our polythene calculator here


SteriLite SuperThermic Specification
UV guaranteed life 5 years
Life expectancy 8+ Years
Thickness 180mu
Diffusion Medium
Frost Protection Very High
Light transmission >89%
UV transmission yes above 380nms
Anti Mist / Drip Yes
Thermicity ~85%%
Temperature reducing Yes
Total UV (300-390nms) <1% – UV Blocking


Additional information

Weight 150 kg

Unsure what size polythene you need?

Measure your polytunnel following our diagram and note down the measurements for A, B and C. Enter the information into our calculator and it will work out the size of sheet you will need in order to cover your structure.

Related products

  • Sunmaster Super Diffused Evo Anti Condensation (AC)


  • Stockmaster White

    From £8.90 (per metre)

  • SunMaster Cool

    From £9.18 (per metre)

  • SunSmart Green

    From £8.85 (per metre)