Thanks for the report.
I've been seeing more mention of the Kapci brand in the fakebook groups as well.
"high build" is, to me, a tough term because it is marketing directed, and does not
really tell us about the makeup of the product.
For modern products that are intended to be used as a surfacer, we have Polyester and Urethane.
If the ultimate goal is really "high build", then you really want Polyester surfacer.
Evercoat feather fill/slick sand/optex superbuild
USC Eliminator
Clausen Sandy/all u need/rust defender
www.clausenautobody.com
*always adhere to the fluid tip recommendations in the TDS
In the Urethane surfacer world there are both standard build and high build products.
The MarHyde was high build urethane. If we want another high build urethane, then we have to very
specifically look for it, and there are tons of different ones out there.
my favorite is SPI standard build urethane, but have had good results with spi high build too, and
have had good experiences with Matrix. On a super tight budget I would not be afraid to try Finish One 2k urethane, and Have seen many good reviews of Upol as well, and would be willing to try it. Whatever isn't available locally I'd just grab it online.
Myself, I would shy away from trying that particular Kapci product because of the first sentence of the
tech sheet: "Kapci 625 is a flattable 2K acrylic filler developed for use........"
This seems to be a friendly way of saying it is a lacquer product at the core, that has been converted to run an activator.
Based on that alone, humbly, it is a concern.
(Personal rule, no more acrylic anything for me. Not since 1992 and I am not going back.)
It could be a perfectly good product but I'm sold on modern materials.
Worth mentioning... there are newer hybrid product$, and some reasonably block sanding-friendly epoxy products that are sometimes used throughout a job. These are generally not designed for very high/thick build compared to a polyester or urethane, but are popular among many high end builders as they feel they get a superior end result.