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From our technical experts

Thermalux Heat Retention Cover Blue/Blue 20′ x 40′


  • For pools run up to 30°C
  • Extremely hard wearing
  • Reduction of heat loss



Foam Heat Retention Covers

Certikin foam heat retention covers are manufactured from a closed-cell PE foam. Our 6mm Thermalux is suitable for all heat retention purposes on pools run up to 30°C, and benefits from a laminated underside and a strong woven polyethylene top coat making it extremely hard wearing. The density of the material helps to keep light penetration to a minimum and therefore reduces algae growth.

Of course the main purpose of a heat retention cover is to limit heat loss and this is where foam covers come into their element – a good fitting and correctly used 6mm foam cover will eliminate heat loss by 85- 90%, significantly reducing running costs and offering a very quick payback period (retention and payback will differ from site to site).

Due to the nature of these materials, and the manufacturing process, some creasing of the top coat can be present (especially on hemmed covers) and the cover may not lie perfectly flat. Covers are rolled, not folded, for dispatch in order to eliminate these where possible.

Unless requested otherwise at time of order, all 6mm foam covers will be made approximately 30mm narrower than pool width to allow ease of movement on and off the pool. Covers over 10.5m in length will be seamed across the width of the cover. Covers at or over 100m² cannot be hemmed.

Modifications & Accessories: For all modifications and accessories such as hemming, reinforcing, shaping, towing systems etc. please call prior to ordering.

20′ x 40′ Thermalux 6mm Foam – Blue/Blue

  • Tough woven surface and laminated underside
  • Hemming optional – at extra cost
  • 350g / m²
  • Panel width 1850mm
  • R-value 0.16 / U-value 6.25
  • 4 Year Pro-Rata Warranty
  • All sizes and shapes can be quoted for
  • Special delivery rates apply to this product. Delivery Price On Application – please email or call with your postcode.

How to treat green water

Find out all you need to know about algae and green water, how to treat it and how to cure it.

Returns Policy

Your rights to return goods are protected under the EU Distance Selling Directive.

You are entitled to cancel your order and return the goods within 7 working days for a full refund not including the cost of delivery. Do this by contacting us by email or telephone and quoting the order number supplied to you. Your refund will be paid within 30 days. You are responsible for the cost and risk of loss or damage when returning the goods, so you should take out enough postal insurance to cover their value. This cancellation policy does not affect your rights when we are at fault - for example, if goods are faulty or incorrectly-described.

Exclusions: Bespoke items (made to measure items) are not included and cannot be returned. If a bespoke item is faulty then the product warranty /guarantee will take effect.

Any goods returned should be in saleable condition.

These terms apply to your order. We may change our terms and conditions at any time, so please do not assume that the same terms will apply in the future.

None of these terms affect your legal rights and these are not diminished in any way. If any term is held to be invalid under any applicable statute or rule of law, that term is automatically omitted from the terms to minimum extent necessary to comply with the law and without affecting the validity or enforceability of the remainder.

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