Waterfall burning rate/duration

[Nemo_Tenetur]

Below you can see a waterfall with 20 sparklers, each sparkler has about 3/4 inch diameter and 10 inch lenght. Total weight is about 5 lbs (2300 grams), the sparkers are separated each other with about 20 inch cord.

 

What is the average burning rate of a waterfall?

 

This type doesn´t seem to be rain-resistant. Is it possible to coat/cover the waterfall with something to make it water-resistant without changing the properties/burning duration?

 

Any helpful information is welcome - thank you.

 

http://www9.file-upload.net/thumb/26.08.07/s31fk.jpg

 

 

http://www9.file-upload.net/thumb/26.08.07/8mwcg1.jpg

[Mumbles]

For that size, you'd want something on the order of 30-60 seconds minimum.

 

To make then weather resistant, you could always just coat them in wax, or used waxed or plastic coated kraft paper when rolling up the tubes. This would afford at least a little bit of resistance. I suspect the solution taken by the industry is to use plastic tubes. Anything on the outside should have no effect what-so-ever on the burn rate, as any changes would be very minimal.

[cplmac]

That waterfall will burn for 60 seconds give or take ten seconds, that's pretty much the same waterfall we get every year. Why exactly do you need it to be waterproof?

[Nemo_Tenetur]

Thank you for replies. Well, here in central europe the weather changes quickly in fall, so I need a rain-resistant waterfall. I´ll try it with adhesive plastic tape to cover the quickmatch and sparklers. My firework supplier had no waterproof waterfall in stock, so I have to find a protection against shi**y weather.