[SEL] New epoxy product

[Jim Hardman]

Jerry, and all,

Some epoxies will stand up to hot water, others will not.  For underwater or 
occasional hot water applications, specialty formulations are required, 
often called "splash zone" epoxies.  These are typically used on concrete 
piers at the water line where wave action erodes and consumes the pilings.

Just because the fomulator says his product has "unlimited uses" doesn't 
mean that it is good for all applications.  Before assuming that any epoxy 
will do the job, get a statement of suggested applications from the maker. 
Not the seller, (the middleman), but the formulator... the actual maker. 
Note too that some epoxies can be applied to wet surfaces, others require 
absolutely dry surfaces.

For most engine applications, epoxies are acceptable choices for 
reconstruction where high temperatures are not expected.  Anything over the 
boiling point of water can be trouble for a lot of epoxies.  And the 
presence of water can compound the problem.

This is not a blanket condemnation of epoxies for repairing water jackets. 
It is, however, a wake up call that all epoxies are NOT the same and that 
specialty compounds are generally available for most applications.  Do your 
homework and contact the maker for approval for your particular job.

As a side note, the ratio of resin to curing agent can have a profound 
influence on ultimate performance.  Sloppy guessing or failure to properly 
weigh components can really mess up cured properties.  And mix twice a s 
long as you think you have to to truly get association between reacting 
chemicals.

Clean up thoroughly with soap and hot water after exposure to resin and 
curing agent.  After cure, the danger of exposure is greatly reduced... that 
is, the exposure to chiplets and dust from sanding or filing.

Use common sense.

Jim in Vermont



----- Original Message ----- 
From: "Jerry Evans" <jerrye at databak.co.za>
To: <stationary-engine at oldengine.org>
Cc: <sel at lists.stationary-engine.com>
Sent: Tuesday, April 28, 2009 1:30 PM
Subject: [SEL] New epoxy product


> Hi All,
>         A local newsletter has a few interesting articles on repairing
> things with a locally produced epoxy product. I'm trying to get some specs
> on the product which is called "Steenvas" and will keep you updated.
>
>         You can download the newsletter from my site here:
> <http://www.oldengine.org/members/evans/paraffinalia/index.htm>
>         and download the last link on the right hand side. <Cape Vintage
> Engine12 - April 2009)
>         Read the articles by Andy Self about repairs to a Tangye engine as
> well as a few others.
>
>         The company producing the product has a page here:
> <http://www.steenvas.co.za/index.htm>
> (Excuse the bad grammar - it looks to have been translated from Afrikaans
> to English and pretty badly at that.)
>
> Keep the revs up (or down)
> Jerry Evans
> Near Johannesburg in Sunny South Africa.
> Etched Brass Engine Plates made to order:
> <www.oldengine.org/members/evans/plates/index.htm>
>
>
>
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