Does it adhere to plastic?

This is for wood try doing a search for plastic epoxy. That should put you in a better direction.

If I use it to repair the top 4 or 5 inches of my porch post, is the paste strong enough to hold a 4X6 beam(beam is on side of post with bracket)?

I have personally used this to repair several areas around my house. I can tell you when it dries it is incredibly hard and durable. You can sand it, so if you don't form it perfectly you can smooth out any bumps. I was able to put screws through it as well. Without seeing the post my answer is this: if you are repairing decay and not the entire top of the post then yes. I would also recommend cleaning up all the rotten or broken wood as possible then spray it with a wood petrifier if damage is due to wood rot. The petrifier will hardened in 24-48 hours, then I would use system 3. The petrifier is relatively inexpensive.

Could you use this in a silicone mold to create replacement carved trim on furniture?

I cant tell you about the paste , but they have the pudy that comes in some different colors and it works great, for making parts and pieces of lots of things including wood. I love to work with this stuff. There is a time limit on it though, but if you are putting it in a mold shouldn't have a problem.

Can this be used on vertical surfaces? A standing wood beam has a crack. Or better to use the putty?

Most epoxy paste or putty would work. If it continues to enlarge, it could crack again. Caulking would allow some movement.

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System Three SculpWood Paste Epoxy Wood Filler, 0.5 Gallon Kit

Product ID: 28448547

Details

Brand
SYSTEMTHREE
Color
Brown
Item Form
Paste
Material
Epoxy Resin
Special Feature
Waterproof

💧100% waterproof epoxy

🕒6-8 hr sandable cure

🪵perfect wood filler paste

S/.654

Duties & taxes included

In stock

Sold byAmazon PeruDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Restore, don’t replace—epoxy wood repair that professionals trust!

FAST SANDABLE CURE - Ready to sand in just 6-8 hours at room temp—get your project moving faster.
SMOOTH CREAMY PASTE - Easy to apply with a drywall-like consistency for flawless crack and hole filling.
VERSATILE WOOD REPAIR - Perfect companion to SculpWood Putty or standalone for architectural wood restoration.
WATERPROOF DURABILITY - Engineered to withstand moisture, ideal for exterior and marine wood repairs.
MADE IN USA WITH SUSTAINABILITY - Crafted since 1979 with eco-conscious materials without sacrificing performance.

System Three SculpWood Paste is a premium 2-part epoxy wood filler designed for fast curing, waterproof durability, and smooth application. Ideal for filling cracks, holes, and small defects in wood, it sands easily after 6-8 hours and is compatible with most primers and paints. Made in the USA with sustainable materials, it’s the go-to choice for professional-grade exterior and interior wood repairs.

Specifications

ASIN	B00UVH1JHK
Best Sellers Rank	#88,027 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #103 in Tile Epoxy Adhesives
Brand	SYSTEMTHREE
Brand Name	SYSTEMTHREE
Color	Brown
Compatible Material	Wood
Container Type	Tubs
Customer Reviews	4.6 out of 5 stars 219 Reviews
Full Cure Time	24 hours
Global Trade Identification Number	00646697002820
Included Components	2 Component Paste
Item Form	Paste
Item Package Quantity	1
Item Weight	3.7 pounds
Manufacturer	System Three Resins, Inc.
Material	Epoxy Resin
Material Type	Epoxy Resin
Mixing Ratio	1:1
Model	1610K20
Number of Packs	1
Number of Pieces	1
Other Special Features of the Product	Waterproof
Part Number	1610K20
Special Feature	Waterproof
UPC	646697002820
Unit Count	64 Fluid Ounces
Viscosity Level	Medium
Volume	0.5 gallons
Water Resistance Level	Waterproof

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