303 high tech fabric guard

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seabeagle

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C Dory Year
2007
C Dory Model
16 Cruiser
Vessel Name
Sea Beagle II - Sold 4-19-12
I know that Sunbrella recommends the 303 spray for protection. But, is there a cheaper alternative? Is Thompson's water sealer beyond the realm of stupidity? In the past I've used the silicone based camping tent spray but, it doesn't seen to last more than 2 weeks on a camperback.
 
I sure wouldn't put Thompson's on a fabric if you mean the kind you use to seal decks! :roll:

Charlie
 
I think the 303 protectant is reccomended as a U.V. light protectant.(sun tan lotion for vinyl and fabrics) not a waterproofing treatment.
 
303 is expensive but it works and it lasts. I sprayed our camper back in March and it still beads the water with no problem.[/list]
 
303 web site has a special for $80 for a gallon, spray bottle and wipes
 
I was reading the MSDS for it and found that 95% is odorless mineral spirits. Also Amazon has a gallon for $89.49 shipping included. The deal on the 303 website is the protectant only not the fabric guard.
 
I read the cleaning sunbrella info and seen "Sunbrella fabrics are treated with a fluorocarbon finish, which enhances water repellency." I was also looking up info on Bass Pro Shop's Waterproofing with PTEF spray and found a Q&A stating that "It is a fluropolymer-based product." and it has the same odorless mineral spirits base. A gallon of the Bass Pro is $38.00 which is much less than the 303. Any thoughts? $52.00 savings = a nice day on the water if it works. I also spoke with a guy from 303 on Friday and he said that friction breaks down its effectiveness. Our camperback is always up and we regularly travel 70 mph on the highway with it which surely creates a LOT of friction.
 
I have used the 303 Fabric protectant, since I was getting it wholesale. I suspect the Bass Pro material is similar. I do spray my canvas (Sunbrella every year or so, after washing it). The mineral spirits is just a vehicle for the active ingredient.

On the other hand, I don't drive long distances with the camper back up. Not just friction--but vibration, debris, road dust/diesel particulate, asphalt etc is bad for the fabric.

I agree with Capt Charlie--only use Thompson's or waxed canvas sealant as a last resort, if the Sunbrella is on its last legs.
 
Eight years ago said:
303 [fabric spray] is expensive but it works and it lasts. I sprayed our camper back in March and it still beads the water with no problem.
Click to expand...
The waterproofing on my camperback needs restoring. Can anyone tell me how many coats of 303 spray I should use, and about how much of the product it would take?
 
I like neverwet

This is what I use on my duck hunting gear and its amazing. i sprayed a back pack two years ago and its stillwater proof. It was not a water proof pack to start. You do have to apply it when its warm and you want to be out side. Nasty off gassing.
 
I put two coats of 303 on the canvas. One quart spray bottle should be plenty. I buy it in the gallon--considerably cheaper. I have seen it as low as $40--most places have it for $50 a gallon. The quarts can range from $13 to $35..! The Sunbrella still "breaths". Not sure if other waterproofing materials will allow that.
 
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