We have decided that we need to water proof our tent this year for the first time. Any ideas how much we should buy to proof a 6 berth, 3 pod dome tent (Hi Gear Sahara 6) please? Also, any suggestions on which brand of water proofer is the best? Many thanks
A modern synthetic tent should not need reproofing, other than seam sealing, it has an impermeable polyurethane coating on the inner face of the fabric.
Copied from your other thread on the same subject:
I am assuming the Hi-gear Sahara 6 is polyester in which case if it starts leaking through the material itself it will be knackered and no amount of waterproofing will seal it.
Polyester is waterproofed during manufacture with a polyurethane waterproof membrane on the inside. The coating on the outside is just to make the rain run off quickly without soaking into the material, aid drying, and in more recent years it also contains UV protection which helps to preserve the material longer. If the inner waterproof membrane fails then the tent is a write off.
If a synthetic tent is going to leak at all it will do so through the seams...through the stitching holes. The seams of new tents these days are taped on the inside to help prevent leaks through the stitching holes. On old tents or those not finished very well, the tape can start peeling off in which case you will need a seam sealer applied to the leaking seams on the inside of the tent.
Seam sealer is basically a clear rubberised glue and usually comes in a tube or a small bottle. It is applied with a small brush or a sponge applicator. It sticks peeling tape down and seals any exposed stitching holes.
I sprayed the outside of my tent with Fabsil because it had clearly lost it's outer protection after being erected for months in all weathers. Rain was soaking into the material and not beading. Rain now beads on the surface and runs off and makes it look cosmetically better as well as aiding drying and hopefully preserving the material for a little while longer on a tent that has probably already had a lifetimes use under normal circumstances. A newish tent or one that hasn't seen much use shouldn't need respraying but as Mucker has said, give it a hose down and see what it looks like if you are worried.
We always use fabsil - put it into an old spray bottle and take it on your next camping trip - once tent is erected spray it. that's how we do ours - once a year - makes the water bead and roll off and makes the tent dry much quicker after rain.
Just a word of warning if spraying Fabsil...do it on a wind free day and wear a face mask. I felt ill for two days after spraying mine...probably waterproofed my lungs!
I reproofed an 9 year old montana 6 last year, the first roof section near the door started to leak very badly. I used fabsil gold, 3 litres was enough to treat the entire tent using a pump spray and rubbing in method, the roof was given 2 coats. I managed to treat the roof by pitching the tent roof as shown in the attached picture
http://postimg.org/image/ulrugvw9p
The tent was then pitched fully to do the sides,
The tent has performed flawlessly in some really bad Welsh storms since with not a drop off water coming through and as the price of a new monty is around £700 it seems that even if you have to reproof every year, which I'm not sure I will have to, for the sake of £50 quid and a weekends work its a no brainer really.
You can reproof a polyester tent I can vouch for that as can my much used and much loved monty!!
Just to say, after discovering a small drip coming from around the skylight on a VERY wet and windy weekend away, we decided to go ahead with reproofing. We used Gelert seam sealer around the skylight, and then used Fabsil, which we applied with kitchenroll - we tried spraying and found it was going everywhere, but wiping it on with kitchen roll worked really well. We used around 3.5 litres on the whole tent plus the extension, and it took only around an hour to be completely dry. Be warned - Fabsil kills grass (logical really). Thanks for all the advice
Been wondering this myself... our tents only a year old but thanks to some loose seagulls some of the waterproofing on the roof has obviously deteriated. Was going to get some solar proof to put on when we next go camping but... don't think the campsite would be too chipper with us killing the grass... will have to do it at home then... thanks :)
------------- June 2015: seaview international 2 nights
July 2015: little winnick 2 nights
August 2015: lower polladras 5 nights
august 2015: tollgate farm 5 nights
august 2015: oakdown 3 nights
September 2015: tregarton park
family of 6 with young children