... hexamine solid fuel tablets. Inexpensive, compact, and non-explosive...
hexamine is the most expensive fuel you can buy
coghlan's 24 fuel tablets of hexamine , 0.2oz per tablet, 0.3lb total at 12,900 BTU/LB is 3870 BTU total. you can buy them at these prices
3870 BUT / $18.15 USD = 213 BTU/$ dollar
3870 BUT / $12.83 USD = 302 BTU/$ dollar
3870 BUT / $6.33 USD = 611 BTU/$ dollar
696 BTU/$ dollar
3870 BTU / $4.35 USD = 890 BTU/$ dollar
3870 BTU / $2.53 USD = 1,530 BTU/$ dollar
1,610 BTU/$ dollar
Compare that to dollarstore unscented vaseline 4oz for $1 , its 0.25lb * 19,900BTU/lb , 4970 BTU/$
Compare to Walmarts which lists 6-lb Crisco (24970 Calories) 95,400 BTU / $8.98 = 10,620 BTU/$ dollar
Compare to this past winter 40 lb of premium wood pellets for 342,000 BTU / $4.98 = 68,675 BTU/$ dollar
So for a three day or 30 day in-home earthquake kit, hexamine is too expensive as both fuel and tinder.
Everybody has paper and oil/grease/butter around the house to use as tinder to burn pellets or twigs or logs
I would leave the hexamine to Ultralight gram counters