How is this better than other epoxy products? Specifically, west systems epoxy?

I don't think there's anything you can do with this that you couldn't do with WEST System if you were determined enough, but it certainly wouldn't be my first choice for smoothing a 3D print. This stuff is very runny by the standards of epoxy, which lends itself to very thin coats that are less likely to build up in small crevices and wash out fine details. That said I'm sure it's also nowhere near as good an adhesive.

Does this product effect the overall dimensions/tolerances of the print? Enlarge or shrink features?

It is a coating that adds appreciable thickness. It will enlarge all external dimensions and can cover up fine features if not used carefully. The effect on tolerance can be reduced by applying thin layers and sanding any remaining grain down.

Type of paint suggestions?

Acrylic / enamel paints work best.

This is a very random question, but can this epoxy also be used to seal cracks and knots in wood?

Our Tarbender may be a better choice for this - it is designed as a bar top epoxy, thought the XTC-3D will work as well, the Tarbender is a clearer material.

Smooth On Xtc 3d High Performance 3d Print Coating 6

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Description

✨ Elevate your 3D prints from prototype to masterpiece with XTC-3D 🖌️

ECONOMICAL COVERAGE - Just 1 oz covers 100 sq inches—maximize your print’s potential with minimal waste.
EFFORTLESS PRO FINISH - Brush on XTC-3D and watch layer lines vanish—no sanding marathon needed.
HEAT MOISTURE SHIELD - Protects prints up to 150°F (65°C) against abrasion and environmental wear.
DURABILITY MEETS DESIGN - Adds a tough, impact-resistant shell that’s also paintable and sandable.
UNIVERSAL COMPATIBILITY - Seamlessly smooths FDM, SLA, and SLS prints from PLA to ABS.

XTC-3D is a high-performance epoxy coating designed specifically for 3D printed objects, offering a simple 2:1 mix ratio that self-levels to smooth and fill layer lines. Compatible with FDM, SLA, and SLS prints, it creates a durable, impact-resistant, and moisture-proof finish that is both sandable and paintable. With exceptional coverage—1 oz per 100 sq inches—XTC-3D streamlines post-processing, eliminating tedious sanding and vapor smoothing, making it the go-to solution for professionals and hobbyists seeking flawless, long-lasting 3D print finishes.

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ASIN	B01BKSLI9M
Item model number	xtc3d
Manufacturer	Smooth-On, Inc.
Product Dimensions	5.08 x 8.89 x 17.27 cm; 290 g

Smooth-On XTC-3D - High Performance 3D Print Coating - 6.4 Ounce Unit

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