Pourable, flexible gap filler??

G'day John

What about a rubber based tile adhesive - you can make it as runny as you want - it will fill all nooks and crannies - will find it's own level - pretty much waterproof and goes quite hard and can still flex and depending on what brand you use it will stick like s--t to a wet blanket !


Cheers


Gazz

Have a look at Bunnings or similar in their waterproof membrane section and you will see some polyurethane membranes that you could pour in with no problem.
You may be able to get a small funnel with a piece of hose as an extension to direct the liquid into the spot?
You will see some water based and solvent based versions, I would use the solvent based one as it will cure better in the high build situation you have

If it needs to be permanent and you're happy with that, what about an expanding foam ?
You may need to make up some sort of reservoir to contain it, and mask areas you don't want covered, but it may be worth a thought.

The "well" is only about 1cm wide, 180cm long, and needs to be filled to a depth of about 2cm

lux Mate that is a big hole to fill.

to put it bluntly...forget anything you will find at a hardware store.

yes you will have problems getting it to flow down there
yes you will have a problem with that volume of most sealers staying flexible AND adhered
yes you will have problems with most sealers with shrinkage
yes you will have problems with most sealers with long term weather durability

AND
among other problems you will have a problem with anything runny enough to get in there running straight out the bottom if it is not a completely sealed cavity at the bottom.

NOW

The place that may have the solution is "Barnes supply", they are an Art and Special Effects supplier with a fabulous array of resins fuillers and mouldable stuff, ranging from dental alginate to so very specy concrete aditives.
They have branches in most capitol cities and do mail order.

People who shop there range from school children with an art project, creative types moulding craft objects and wood workers to, makers of prostetic limbs, special effect artists and builders of sex toy prototypes.

they have a couple of soft flexible resins that may be suitable....and you could make it any colour you like.

cheers

If a funnel and small tube will get to the spot then just put the small tube on the end of your sika flex nozzle and pump it down there, may need to tape the tubing on but yeah

hi john
is it possible to drill holes in the side of the so called well /cavity
you can then put a length of flexible pvc tube onto a sikaflex silicon nozzle and force silicon through the holes into the well/cavity until its completely full it wont run out and will set in time to stop dust/water entry for ever
because I don't fully understand how this well/cavity has been created by the fitting of a rear cab without photo evidence
i'm only suggesting above based on imagination and my suggestion maybe of no help at all
cheers

Ring up your local friendly concrete repairers and get some semi rigid epoxy (sre). Mix it up and pour it in. I'd look for some high flex sre/b which is epoxy with black rubber inert filler to keep it very flexible. Single pack fillers are likely to skin over and never go off in the volume you are talking about - stick to two pack epoxy or maybe even pourable foam.

You could try a couple of things.

1. Spray some body shcutz under pressure into the spce ntil it runs through, then tape off the bottom, top off and let set.

2. Silicone can be made runny by adding shellite (white spirits).
We seam seal bushwalking tents etc with a thinned down mix, so you could do this in a jar and pout in, block off when it gets to the bottom, top off, and let set.

Maybe do a test to see you're happy with the set off, when mixed to a brushable motor oil type viscosity, it goes off just like normal silicone, so should be fine if a little thicker.

Thanks everyone. Some interesting ideas to follow up here.

Cheers, John

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