Politherm AF was introduced into the UK over 10 years ago and wa the first film to combine excellent mechanical strength, heat retention and long lasting anti-fogging properties in a clear, high light transmission film. It has established a deserved reputation for early crop condensation to spread out on the film surface, which reduces water 'dripping' onto crops and leads to higher light transmission - water dropelts on film can reflect back up to 15% of incoming light. Combined with the heat retaining characteristics of the film, this means the warmest conditions in the winter and overnight, and fast warm-up and plant development in the spring.

Polytherm 'Plus' now has a new UVI system which gives a 5 season lifetime and broad band absorption of UV light. This has been shown to assist in the control of spore production of botrytis and downy mildew. Broad band UV absorption also affects insects as it blocks out wavelengths of light which are important to insect vision. Therefore aphids and whitefly infestations can be inhibited, together with the disease they may carry. the behaviour of pollinating insects will be adversely affected, and the development of some flower or plant colours and fragrances may be inhibited.


Clear film with high light transmission and excellent heat retention
Long lasting anti-fog properties
Maximum light and warmth to promote early growth
Broad band UV absorption to assist in control of insects and aphids
Broad band UV absorption combined with condensation control can help in the control of botrytis and downy mildew
Particularly good for crops where early yield is important and where there is influence by direct light levels and temperature. Also for the propagation and development of young plants
Manufactured by Visqueen and benefitting from their expertise & reliability, and covered by their guarantee

Guaranteed for 5 seasons (only if fitted correctly, not guaranteed against acts of violence, willful damage, or acts of god i.e. storms).