Hello, any recommendation for a resin to isolates reliably wire contacts e.g. two wires soldered together used outdoors?
Preferably something I can buy from eBay
Thanks
Thanks. heat-shrink is not 100% impermeable. Please have a look at the example picture, I need same kind of coating. I could then have a heat-shrink above for a better mechanical protection
Normal heatshrink is not weatherproof, but the adhesive lined type Nigel mentioned should be, if you select the appropriate size and have a decent overlap on to the cable jacket.
Self-amalgamating tape is also suitable for outdoor weatherproofing.
It needs a protective layer of normal PVC tape over it, if it's in a position exposed to sunlight.
Stretch the stuff as you apply it and make sure there are 2 - 3 layers everywhere, including the cable for an inch or two beyond the joint or connector.
It very quickly blends in to itself and becomes a one-piece rubber shell or sleeve over the whole thing.
What I have used in the past is a coating of RTV followed by a covering of heavy wall heatshrink.
When it sets, this generally makes for a water proof join.
Max.
Thanks. heat-shrink is not 100% impermeable. Please have a look at the example picture, I need same kind of coating. I could then have a heat-shrink above for a better mechanical protection
Adhesive lined ones are water proof, which is why we use them. As for filling a 'hole' as in the picture, any of the usual potting compounds would do the job (we also use those), or just mix some epoxy resin up and use that.
As rjenkinsgb mentioned, self-amalamating tape is amazing, and makes for a nice water tight joint - we also use that at work
To make a watertight connection that will survive submersion in a hundred feet of salt water, roll tight-fitting o-rings on to the cable an inch or more back from the spliced area, and then shrink adhesive-lined heatshrink extending at least an inch past the o-rings over the entire splice.
We used this method for connecting hydrophones for sonar trials. The o-ring provides good contact area for the adhesive.
DAFLEX SM321 is a large size, heavier wall, adhesive lined, heat shrinkable tubing with a meltable adhesive liner. When 120°C is applied, the tubing will shrink to 1/3 of its supplied size. As the outer wall shrinks the inner adhesive liner melts & flows.
yes! Easy. Just mix well, then mix a bit more. Most people don't mix epoxy well enough.
Use a piece of scrap plastic or metal, squeeze out equal Sized dots. Then mix horizontally, across both dots, then pile up the flattened mess into a pile, stir it again until flat, pile up, repeat until you just start to notice the viscosity build. Then quickly apply.
Thanks to all the participents to this thread for your help. I think that the heat shrink sleeve with inner adhesive layer should the the job. Bought few on eBay.