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Old 16 September 2008, 10:38   #21
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
Originally Posted by SnappingTurtle View Post
Is "silicon" bad for Hypalon?
Not per se, but it makes future repairs impossible. And it's silicone, not silicon.


jyasaki is offline   Reply With Quote
Old 20 September 2008, 20:32   #22
Country: Australia
Town: Adelaide
Length: no boat
Join Date: Sep 2008
Posts: 84
Hypalon Repairs:

Best adhesives:
General repairs - Bostik 2402.
High strength area (lifting handles) - SC2000.

When doing repairs on Hypalon craft you'll need to grind the fabric to remove traces of old glue. MEK is of no use on hypalon craft when doing repairs , only PVC boats. MEK can be used to remove stains.

Easiest and cheapest way to find difficult leaks. Go and buy a cheap hand held pressure sprayer add some dishwashing liquid and fill with water. Pump boat to full pressure and spray entire boat. Small bleeds will show in around 3 minutes. Larger holes you should be able to pick up audibly.

When we get boats in with a lot of old repairs, we usually start from scratch by removing all the old daggy patches, regrind the affected area and apply a single new patch. The problem with old boats is that the owners keep sticking patch upon patch and that does not resolve the problem.

Latex No. 4240.

this is generally only applied when the craft is on it's last legs. We drop in 500ml for each side for say a 2.8m boat. 3.4 you'd be looking at a litre each side. Just pour it in, pump it up (low pressure) and turn the boat every which way for around 5 minutes.

As a general rule boats that are well looked after the life span is: PVC boats - 15 years. Hypalon boats - 30 years. The last 2 digits of the serial number denotes the year of manufacture. Surf club hypalon boats are generally 15-20 years due to high usage.

S4Simon is offline   Reply With Quote

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