Call our Team

1 300 888 972
Mon - Fri 8AM - 4PM
Australia Wide Delivery
Expert Advice
20 years experience


How effective is ThermaLock® as a thermal insulation material?

Extremely effective ...essentially because stabilized air is such a good insulator.

Does ThermaLock® absorb water?

During the process of moulding a block, tiny channels are formed between the EPS particles. If the material is immersed in water these tiny channels can be filled with water. After immersion for more than 360 days, there may be up to 6% water content by volume, which has entered the channels.

Even under such an adverse and rare condition of prolonged saturation, ThermaLock® suffers little adverse effect. It maintains its shape, size, structure, cohesion and physical appearance. The ability of EPS to resist the adverse effects of moisture is exemplified by its widespread use in floats, marinas and other applications, which involve full or partial submergence in water for prolonged periods of time.

Does ThermaLock® have a capillary action?

No. ThermaLock® does not have a capillary action.

Does age affect the thermal performance of ThermaLock®?

No. EPS consists of 96% - 99% air and 4% - 1% material, and nothing else. Because of its cellular structure EPS is dimensionally stable, and will not settle over time. ThermaLock® used and installed correctly does not deteriorate with age and as such is able to deliver constant R-value for the life of the building.

Is ThermaLock® strong?

Yes. ThermaLock® can be manufactured in a number of classes (or densities), and each class exhibits excellent compressive and flexural strength and dimensional stability characteristics a very high strength to weight ratio.

The range of classes available enables engineers to select the most appropriate balance between structural and insulation properties for any application.

Is ThermaLock® degraded by ultraviolet light?

Prolonged exposure to sunlight will cause a slight discolouration (yellowing) of EPS insulation and cause some surface embrittlement.

Even so, the thermal insulation properties will not be affected unless exposure results in loss of thickness of the EPS boards, although the friable surface can make bonding difficult. For this reason, EPS insulation should be covered to protect it from UV light if it is to be stored in the open for extended periods.

Is ThermaLock® durable?

Yes. Because ThermaLock® is an inert, organic material, it will not rot and is highly resistant to mildew. It also provides no nutritional value to ants, termites, or rodents.

Provided ThermaLock® does not suffer mechanical damage or failure of any fittings that may be used, it should have a life equal to that of the building in which it is installed.