The formulation used in our products can be affected by both exposure to air as well as heat.
Heat can act as an accelerant to degrade the effectiveness of a product - we have conducted accelerated stability tests at around 40 degrees to gauge the shelf life of the product in ambient temperatures. Our procedures state that 8 weeks at 40 degrees is the equivalent of 2 years at ambient temperature, so effectively having the product for 1 month at 40 degrees, the product 'ages' by 1 year.
Based on this, if the product was heated by only for a relatively short period of time (our tests are conducted over a period of weeks, rather than days or hours), then the impact on the product would be very minimal. If the product was subjected to other conditions such as being exposed to the air through damaged packaging etc, then this would contribute to a breakdown of the product.
Unless it is known how the products were stored prior to being delivered, we can only assume they were kept at an ambient state and provide data relating to their effectiveness based on this. Provided that the shipping time is relatively quick in comparison to the tests we have carried out, it is likely that the products would still be effective for their intended use.