Sunbrella Stain Removal

Blue Crab

benthivore
15,490
2,424
Outer Banks
Guessing this is mold. Pic is after a serious soap and water scrub. Removal thoughts?

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slug zitski

Super Anarchist
5,295
911
worldwide
No idea

i typical use oxyclean for canvas work and covers 

dissolve in warm water , let the canvas work soak for several hours , rinse clean 

does a good job 

0D5DA37E-C404-4F9B-A346-49D5CD771AE5.jpeg

 

Blitzen

Member
I've had pretty good luck with citrus-based cleaners like Simple Green.  This is from their website - for mildew:

  • Combine one fourth cup dishwashing liquid and one cup bleach per one gallon water. A stronger percentage of bleach may be necessary for severe mildew.
 

slug zitski

Super Anarchist
5,295
911
worldwide
It’s important to remove , rinse , all soap or cleaner off

Soap residue will cause mildew 

the typical cleaning basin  for large stuff and ropes is a child’s inflatable swimming pool 

it you take care of it it will last a few seasons

AD3ACDA4-D734-45A1-805A-BAC63653678E.png

 

Max Rockatansky

holy fuckfarts!
3,687
905
Glen Raven, manufacturer of Sunbrella, why would they know best? Yes, bleach is ok, as per the instructions



General or Light Cleaning

To clean Sunbrella while still on an awning frame:

Brush off loose dirt.

Hose down.

Prepare a cleaning solution of water and mild soap such as Woolite® or Dawn®dishwashing liquid.

Use a soft bristle brush to clean.

Allow cleaning solution to soak into the fabric.

Rinse thoroughly until all soap residue is removed.

Air dry.

May not require re-treatment depending on the age of the fabric.

If stubborn spills persist, you can use a diluted bleach/soap mixture for spot cleaning of mildew. For roof run-off or other similar spills a strong degreaser may be required. Specific information on spill cleaning is available in our Cleaning Guide.

Heavy Cleaning for Stubborn Stains and Mildew

Sunbrella fabrics do not promote mildew growth, however, mildew may grow on dirt and other foreign substances that are not removed from the fabric. To clean stubborn stains:

Prepare a solution of 1 cup of bleach and 1/4 cup mild soap per gallon of clean water.

Allow mixture to soak into fabric for up to 15 minutes.

Clean with soft bristle brush. Note: This step should be avoided when cleaning the coated side (back side) of Sunbrella Plus, Supreme, or Clarity.

Rinse thoroughly until all soap residue is removed.

Air dry.

Repeat if necessary.

Re-treatment of fabric for water and stain resistance will be necessary after using bleach solution.

Note: Use caution when cleaning the coated (underside) of Sunbrella Plus, Supreme, or Clarity with the recommended bleach solution. The coated side of the fabric should only be sprayed with the recommended bleach solution and rinsed thoroughly.”

 
Last edited by a moderator:

silent bob

Super Anarchist
8,610
1,227
New Jersey
As above use Soap, not Detergent!  Detergent will break down the DWR (Durable Water Repellent). I like to add Borax to my mix, it softens the water and is a great mildew inhibitor. 

 

Blue Crab

benthivore
15,490
2,424
Outer Banks
Going to be warm today. I'll try the Oxy first. Found this blurb on 30 Sec Off: 

"But I have a question: Is this product safe on synthetic fibers? I want to hang my sails (from my sailboat) in the back yard and spray them with this product. The fabric and stitching is 100% synthetic (like nylon). Would sodium hypochlorite cause harm?

20 MINUTES LATER: I think I found the answer to my own question, which I'll share for other sailors: Don't. Sodium Hypochlorite, including household bleach, can, according to The Practical Sailor, remove up to 90% of the fabric's strength: https://www.practical-sailo.... PS recommends good old mild soap. So I guess I'll go that route."

From PS: "For surface dirt on polyester sails and canvas, we like Formula B; it kills mildew and leaves an inhibiting residue. For mildew and algae stains we like all of the oxygen bleach products (such as Oxiclean). The formula CS-530 may have a slight edge in soil removal, but frugal sailors will want to save this for a last-ditch attempt"

Formula B

1 quart hot water

2 tablespoons baking soda

2 tablespoons Borax

1 tablespoon TSP Cleaner (trisodium phosphate)

Will post results.

 

Max Rockatansky

holy fuckfarts!
3,687
905
To repeat:

Sunbrella’s own advice is to use a bleach solution, as per the above link and quote.

Sunbrella is solution-dyed acrylic.

 

Startracker

Member
390
103
Van Isl.
Yeah man. I read it both times you posted AND when first introduced in post 3 or 4 as well. Was seeking first hand experience. 
I would never use it on sails, wrong material.  On Sunbrella it works a treat.  Every boat detailer I've met uses some variation on the theme, 30 second off is the most popular though, why I couldn't say.  Pre-wetting the top proper rinse and seal with fabric guard when dry or you'll have to do it again soonish.    Properly treated and sealed and then just stay on top of it with soap and water and re-sealing as needed in the future.  I did a few tops myself this year, nasty slimy green ones at that.

I wouldn't use a product I haven't seen professionals use, but it's up to you.  

 
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