Well-built Spalock 213 x 213 R=19 cm Grey from Sannra™ , with high thermal insulation.  

Fits many hot tubs including Sundance, Peyton, Edison, Dimension One, Breeze, Dream, Diamante, San Gabriel, Folkpool, Dream, Sojourn, Wayfarer, Calspas, Jacuzzi J-506, Hotspring limelight flair and others.  

Constructions consists of insulating blocks with a density of 25 kg per cubic meter. Reinforcement is via a galvanized steel U-beam.
(steel is superior to aluminum in strength and torsional stiffness) which is embedded in the insulation block so that it does not risk damaging the moisture barrier.
The moisture barrier is in turn vacuum-sealed, hot-welded and made of aluminum-coated plastic film. Thickness and density are extremely important for insulation.
Our Sannra™ Lids therefore have a maximum thickness of 127mm at the center and 102mm at the sides for effective water drainage. In order for the cover to stay well on the bath, it comes with a skirt that prevents the wind from grabbing it. It also comes with buckles to attach it to the bath.

The function of the moisture barrier and importance of a spalock is worth further comment. One of the most common problems with spalock
is that the moisture barrier fails and the cover takes in condensation and therefore soon weighs 100 kg. The quality of the moisture barrier is therefore extremely important. We therefore decided to offer the absolute most reliable moisture barrier on the market and we are convinced that we have now achieved this. The moisture barrier is made of Mylar, which is a material of specially treated polyester and aluminum foil.

Marine vinyl which surrounds the entire structure is of the highest quality and is anti-UV and anti-mildew treated at the factory.
Finally, for maximum durability, the joint of the vinyl is insulated along the entire length of the spalock with 2 small and one long cushion to create the
sustainability and minimize heat loss.

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