Looking for a trowelable foam...

[Externet]

Any suggestions for a trowelable product like the foam-in-a-can for sealing gaps, cracks and insulating ?

 

This product, after applied out of the can, cannot be troweled/molested at all until dry, as it collapses to nothing:

---->http://img2-2.timeinc.net/toh/i/a/tools/foam-spray-00.jpg

[Greg H.]

What are you trying to do? That may help people provide suggestions.

[John Cuthber]

My local DIY store sells a "filler" that must be foamed because it's very low density.

I can't recall the product name, but it's easy to find.

Go along the shelf picking up the tins of ready mixed filler; the remarkably light one is the one I mean.

I think it's foamed PVA with CaCO₃ in it or some such

[Externet]

What are you trying to do? That may help people provide suggestions.

The intention is to evenly coat an irregularly shaped 'mosquito net' with a couple of cm. of such insulating foam for a custom light thermal rigid cover. The net provides the reinforcement, adheres to the foam, and conforms to the object shape to cover.

 

Similar application, without the reinforcement net core and of a very small size :

----> http://www.qcidirect.com/outdoor-faucet-cover.html?utm_source=GoogleShopping&utm_medium=cse&utm_campaign=outdoor-faucet-cover&gclid=CPG6ooTY6r0CFQsSMwod4QMA9w

 

Thanks.

Edited April 18, 2014 by Externet

[dimreepr]

You could create a mould and inject it with the ‘foam in a can’, although I’m unsure if there’s a release agent that would be effective, in which case a lining of some sort maybe cling film.

[Greg H.]

Have you tried forming the net into the required shape and just spraying the insulation onto it? (I assume you have, but I thought I would ask)

 

If it were me, I would probably use rigid foam insulation instead. Cut it with a hot knife or hot wire cutter to the proper shape and then use an adhesive caulk to join the bits and seal them. Given that I don't know your final application, that may or may not work for you. but I do something similar to build up insulation layers for hills on my model railroad.

[Externet]

Thanks, Greg.

Yes, tried several ways, including rubbery undercoating spray instead of the foam : not rigid result.

 

The foam-in-a-can product does not 'spray' out of the can, that is the problem. It just flows slowly out of its dispenser tube and it is totally unmanageable, untouchable until set. Dressed a plastic film on top of item, covered/conformed with the net, and applied the foam : untrowelable.

The item to be made is 6' x4', somewhat convoluted.

[Acme]

Thanks, Greg.

Yes, tried several ways, including rubbery undercoating spray instead of the foam : not rigid result.

 

The foam-in-a-can product does not 'spray' out of the can, that is the problem. It just flows slowly out of its dispenser tube and it is totally unmanageable, untouchable until set. Dressed a plastic film on top of item, covered/conformed with the net, and applied the foam : untrowelable.

The item to be made is 6' x4', somewhat convoluted.

There are products available that spray out like a paint sprayer sprays. You do any required shaping after it dries.

 

>> http://www.amazon.com/Fomo-Products-Inc-Handi-Foam-Insulation/dp/B00901ONRQ/ref=sr_1_1/188-4043830-4754942?ie=UTF8&qid=1397852973&sr=8-1&keywords=Spray+Foam+Insulation+Kits

 

Here's a link to the company site. >> http://fomo.com/products/default.aspx

[michel123456]

I don't think polyurethane will do.

 

Better get a cake recipe from your mother in law.

Edited April 18, 2014 by michel123456

[Phi for All]

I don't think polyurethane will do.

 

Better get a cake recipe from your mother in law.

 

Unbaked = trowelable foam. Baked = doorstop.

[Greg H.]

Thanks, Greg.

Yes, tried several ways, including rubbery undercoating spray instead of the foam : not rigid result.

 

The foam-in-a-can product does not 'spray' out of the can, that is the problem. It just flows slowly out of its dispenser tube and it is totally unmanageable, untouchable until set. Dressed a plastic film on top of item, covered/conformed with the net, and applied the foam : untrowelable.

The item to be made is 6' x4', somewhat convoluted.

You could try a mixed application. Use the rubbery undercoating spray to form the initial shape and then coat both sides of it in the spray foam to give you your rigid surface.