Mildew and mold spore spotting can occur on the Hypalon fabric when moisture is left unchecked. This usually appears on boats that are left covered, without adequate ventilation, in extremely humid conditions. Here are some images of what this looks like:
Once it starts, it cannot be stopped. It can however be slowed down, and the majority cleaned. The spotting you show should be able to be cleaned up approximately 70-75%. You will need to make a blend of 50% bleach, and 50% cold water. Spray down the tube, and let the bleach sit for about 20 minutes, but no longer than 30 minutes. Wash it off with ice cold water. Then spray the bleach solution on a second time, and brush the tube with a “Soft” detail brush. Not too hard, or you can damage the fabric, but lightly in circular swirls, to work the bleach through the first layer of fabric, and to remove any spores on top or in the first layer. Clean this off again with ice cold water.
Spray the tube down with a mixture of cold water and a cleaner like soft scrub or simple green, and repeat. Then you can put on the protectant you have been using to seal it.
The first layer of Hypalon is for abrasion resistance, and the second layer is neoprene like used on wetsuits. The mold/mildew spores will settle in the neoprene, and grow out from there because it is moist. So once they take hold, there is no removing them 100%.
In the future, make sure that you use a cover that is vented, and that with any heavy precipitation or humidity, that the boat is uncovered and aired out at least once a week, to keep the moisture out of the bilges and tubes.
Mildew and mold spore spotting can occur on the Hypalon fabric when moisture is left unchecked. This usually appears on boats that are left covered, without adequate ventilation, in extremely humid conditions. Here are some images of what this looks like:
Once it starts, it cannot be stopped. It can however be slowed down, and the majority cleaned. The spotting you show should be able to be cleaned up approximately 70-75%.
You will need to make a blend of 50% bleach, and 50% cold water. Spray down the tube, and let the bleach sit for about 20 minutes, but no longer than 30 minutes. Wash it off with ice cold water. Then spray the bleach solution on a second time, and brush the tube with a “Soft” detail brush. Not too hard, or you can damage the fabric, but lightly in circular swirls, to work the bleach through the first layer of fabric, and to remove any spores on top or in the first layer. Clean this off again with ice cold water.
Spray the tube down with a mixture of cold water and a cleaner like soft scrub or simple green, and repeat. Then you can put on the protectant you have been using to seal it.
The first layer of Hypalon is for abrasion resistance, and the second layer is neoprene like used on wetsuits. The mold/mildew spores will settle in the neoprene, and grow out from there because it is moist. So once they take hold, there is no removing them 100%.
In the future, make sure that you use a cover that is vented, and that with any heavy precipitation or humidity, that the boat is uncovered and aired out at least once a week, to keep the moisture out of the bilges and tubes.
This is located on the transom, right side, on a 1” by 4” plate and starts with US-PKD or PKD
US-PKD is our USCG assigned builder code. “US” for country code. “PKD” for Novurania of America.
XXXXX is the five digit serial number, assigned by Novurania which follows the Sales order and Work order during production.
X correlates to the month the boat is built. “A-L”, works out to January thru December.
XXX is the production year, and the model year of the tender. “415” would be a boat built in 2014, and sold as a 2015 model year boat.
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