Does fresh epoxy stick to dried epoxy?

"David" <[email protected]> wrote in message
news:[email protected]...
> Absolutely!
>
Though of course... epoxy does not dry, it hardens.

RE: Subject

If you lay new resin on resin that is less than 24 hours, no problems.

If you wait past 24 hours, the existing resin may develop an amine blush
which is easily removed with a ScotchBrite pad and water.

I always sand the old resin with a 24 grit disk before laying new resin
on top of old.

HTH

Lew

Icepick wrote:

> Epoxy is great stuff . I was wondering if a non-toxic variety of epoxy
> has been developed yet ?

Not that I'm aware of.

Lew

Well that is encouraging and since I glued up a project last night I'll
let you know how it went in a couple of days.

David wrote:

> Absolutely!
>
> Dave
>
> Icepick wrote:
>
>> I 'm using slow set epoxy .
>>

I roughed it up quite a bit before re-epoxing so the epoxy should bond
alright... I hope ;-)

Epoxy is great stuff . I was wondering if a non-toxic variety of epoxy
has been developed yet ?

Lew Hodgett wrote:

> RE: Subject
>
> If you lay new resin on resin that is less than 24 hours, no problems.
>
> If you wait past 24 hours, the existing resin may develop an amine
> blush which is easily removed with a ScotchBrite pad and water.
>
> I always sand the old resin with a 24 grit disk before laying new
> resin on top of old.
>
> HTH
>
> Lew

Seems to have worked fine.


Icepick wrote:

> Well that is encouraging and since I glued up a project last night
> I'll let you know how it went in a couple of days.
>
> David wrote:
>
>> Absolutely!
>>
>> Dave
>>
>> Icepick wrote:
>>
>>> I 'm using slow set epoxy .
>>>
>

"David" <[email protected]> wrote in message
news:[email protected]...
> Absolutely!
>
Though of course... epoxy does not dry, it hardens.

On 13-Apr-2005, David <[email protected]> wrote:

> Absolutely!
>
> Dave
>
> Icepick wrote:
>
> > I 'm using slow set epoxy .

But it's a good idea to sand the surface of the old epoxy first.
That will remove any amine blush and roughing the surface will also
give the new epoxy a bit of bite.

Mike

"Lew Hodgett" <[email protected]> wrote in message
news:[email protected]...
> Icepick wrote:
>
>> Epoxy is great stuff . I was wondering if a non-toxic variety of epoxy
>> has been developed yet ?
>
> Not that I'm aware of.
>
> Lew

In addition to these, there are many non-toxic epoxy coatings.

http://www.lkecity.com/putty.html

Food-Safe Adhesive
A two-component, low-viscosity EP48 epoxy has high strength and good
electrical insulation properties. It can be used to seal and coat metallic
and nonmetallic substrates and conforms to Title 21, U.S. Code of Federal
Regulations, FDA Chapter 1, Section 175-105 and 173.300 for food
applications. The epoxy has a 100:75 mix ratio and is 100% reactive. It
resists chemicals and prolonged submersion in water, dilute acids,
alkalines, aggressive organic solvents, ethanol, isopropanol, mineral
spirits, and gasoline. EP48 has a Shore-D hardness of 70+ and a tensile
strength of 5 kpsi. It is available in pint, gallon, and 5-gallon kits.

Masterbond Inc.,
154 Hobart St.,
Hackensack, NJ 07601,
(201) 343-8983,
masterbond.com

Years ago I bought an expensive kit of blue epoxy for a GE dishwasher
rack. Now I'm wondering if that was a "non-toxic" type of epoxy...

Dave

Edwin Pawlowski wrote:

> "Lew Hodgett" <[email protected]> wrote in message
> news:[email protected]...
>
>>Icepick wrote:
>>
>>
>>>Epoxy is great stuff . I was wondering if a non-toxic variety of epoxy
>>>has been developed yet ?
>>
>>Not that I'm aware of.
>>
>>Lew
>
>
> In addition to these, there are many non-toxic epoxy coatings.
>
> http://www.lkecity.com/putty.html
>
> Food-Safe Adhesive
> A two-component, low-viscosity EP48 epoxy has high strength and good
> electrical insulation properties. It can be used to seal and coat metallic
> and nonmetallic substrates and conforms to Title 21, U.S. Code of Federal
> Regulations, FDA Chapter 1, Section 175-105 and 173.300 for food
> applications. The epoxy has a 100:75 mix ratio and is 100% reactive. It
> resists chemicals and prolonged submersion in water, dilute acids,
> alkalines, aggressive organic solvents, ethanol, isopropanol, mineral
> spirits, and gasoline. EP48 has a Shore-D hardness of 70+ and a tensile
> strength of 5 kpsi. It is available in pint, gallon, and 5-gallon kits.
>
> Masterbond Inc.,
> 154 Hobart St.,
> Hackensack, NJ 07601,
> (201) 343-8983,
> masterbond.com
>
>

Edwin Pawlowski wrote:

>
> In addition to these, there are many non-toxic epoxy coatings.
>
> http://www.lkecity.com/putty.html

<snip>

Don't confuse uncured with cured states.

Uncured, amine hardener based epoxies are definitely toxic.

Cured, they are inert.


Lew

Absolutely!

Dave

Icepick wrote:

> I 'm using slow set epoxy .
>

True; but I knew what meant. :)

Dave

toller wrote:
> "David" <[email protected]> wrote in message
> news:[email protected]...
>
>>Absolutely!
>>
>
> Though of course... epoxy does not dry, it hardens.
>
>

deja vu.

Dave

toller wrote:

> "David" <[email protected]> wrote in message
> news:[email protected]...
>
>>Absolutely!
>>
>
> Though of course... epoxy does not dry, it hardens.
>
>