Inner sleeve of bladders
According to a retailer of adventure gear here in Australia, statements indicating that certain bladders are not able to cope with ethanol use ( with one saying specifically that if ethanol is used, warranty is voided) should be taken with a grain of salt. At least one USA- made bladder indicates that the bag should not be used for ethanol storage. So, what’s the reasoning? Simply put these statements are to protect the companies from legal action by the users if ethanol is used in the bladder and things go pear-shaped. Two different brands of bladder I checked ( to determine the inner bladder substance) both have the inner bladders made of tpu. A suitable product for short-term use of fuel so my research indicates. One of the bladders has a warning statement about ethanol use, one does not. Conclusion.. it appears that both may be used for short-term carriage of ethanol. The question arises… is some tpu better in terms of ethanol use than other types of tpu? Personally in the case of the two products I saw, I doubt it.
|