RTFC!

The label on the can of Interlux 404 which is on my desk identifies its ingredients:
epoxy resin
xylene
titanium dioxide
magnesium silicate
methyl isoamyl ketone

The can of 414 indicates:
polyamide resin
aromatic petroleum solvent
tri(dimethyllaminomethyl)phenol
methyl n-amyl ketone
silica

The two ingredients formatted bold are, together, an epoxy resin system.

The same ingredients are listed, by somewhat more technically specific names, on the interlux web site.



"Brian D" wrote in message ...
Interlux Epoxy Barrier Kote 404/414 doesn't have any epoxy in it ....that's
the reason for this whole thread. It's a confusing label. It means that it
is a barrier to the epoxy on the boat so you can paint with the paint of
your choice without worrying about interaction with epoxy amines that didn't
get used in the epoxy cure reaction. The primer itself is not epoxy and
doesn't contain any ...just a bunch of high body stuff and stinky solvents.
It works quite well under a paint, both as something to protect the paint
from the epoxy AND as a defect-hiding high-build paint primer that sands and
finishes quite well.

Brian D



"Paul Oman" wrote in message
k.net...
Brian D wrote:

I'm curious ...I gave away my last bit of 404/414 so don't have a label to
read, but who's description was misleading? Interlux's? Or was the
description ambiguous instead? You know ...poorly written and could apply
equally well to more than one (conflicting) type of use? Have you called
the rep and told him about your experiences? Might save some newbies
headaches later on if the labels were clearer... Most companies won't want
you to be unhappy because a product was used for the wrong type of
application.

Brian


Hello All -

adding solvents to epoxy will decrease its physical properties but for a
hull coating that is OK. Epoxies are one of the very few coatings
suitable for constant immersion. Unlike polyester resin, which will let
water pass (hence boat blisters) epoxies provide a waterproof seal -
plain and simple.

epoxy primers, bond enhancers etc. are generally just solvent thinned
epoxy. Epoxies are a common primer under many other coatings. You can
use straight solvent free marine epoxies as a prime. Note that you
certainly would want to worry about amine blush with some epoxies,
especially if you are using them as a primer....

Awlgrip is a polyester polyurethane. Polyurethene's weakest property is
its bonding, hence usually used under a fresh coat of epoxy. Polyurethanes
are never recommended for immersion service, although I
wonder (and will soon be testing) 2 part polys bonded chemically with
uncured epoxy and put into immersion service. It may work, albeit no
one will officially so state.

PAUL OMAN Progressive Epoxy Polymers, Inc.