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 3d Print Coating And Smoothing Epoxy

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Description

🖌️ Elevate your 3D prints from prototype to masterpiece—smooth, strong, stunning.

PRECISION MIXING RATIO - 2A:1B volume mix guarantees consistent results and professional-grade quality.
UNIVERSAL COMPATIBILITY - Perfect for SLA, SLS, PLA, ABS, Laywoo, and powder prints—versatility that fits your creative flow.
FAST EFFICIENT WORKFLOW - 10-minute working time with a quick 3.5-hour cure accelerates your project turnaround.
DURABLE IMPACT RESISTANT - Achieves 80D Shore Hardness for a tough, protective coating that lasts.
FLAWLESS FINISH EVERY TIME - Self-leveling epoxy ensures a smooth, glossy surface without brush marks.

Smooth-On XTC-3D™ is a high-performance, clear epoxy coating designed to smooth and protect 3D printed parts across multiple materials. With a precise 2:1 mix ratio, it offers a 10-minute working window and cures in just 3.5 hours to a hard, impact-resistant finish with 80D Shore Hardness. Its self-leveling formula delivers a flawless, brushstroke-free surface, making it the go-to choice for professionals seeking a polished, durable finish on SLA, SLS, PLA, ABS, and other rigid prints.

Specifications

ASIN	B01BKSLI9M
Best Sellers Rank	#16,267 in Automotive ( See Top 100 in Automotive ) #250 in Automotive Paints & Primers
Date First Available	February 8, 2016
Item Weight	10.2 ounces
Item model number	xtc3d
Manufacturer	Smooth-On, Inc.
Product Dimensions	2 x 3.5 x 6.8 inches

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RM177

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Smooth-On XTC-3D™ 3D Print Coating & Smoothing Epoxy - 6.4 oz

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