If I am using this to fill wood gaps in wood that is not rotted should I still use wood hardener first? How likely is this epoxy to come loose?

The petrifier can be used to harden rotted wood. You can also remove a lot of the rotted wood if that is possible given the project parameters. If you are filling a large void it is good idea to use some screws to act as rebar for the putty. You install the screws below the surface of the repair and make sure to drive them into good material. Then spread the putty into the hold around the screws when dry the putty will have wrapped around the screws almost like you "screwed" the putty to the surface. Make sure the screws are below the finished surface will allow the putty to hide the screws.

the bottom of my sash is rotted, so how do I keep the epoxy in the hole

Tape over the bottom if you have access to the bottom, but if not try plugging the bottom of the hole with putty or glazing compound

How thick can this be built up? I have floor joist, hacked by plumber. I've sistered it up but also want to fill gouge 3"W and ~3" deep

This can likely do it, just make sure you buy enough of it. I filled a 1" x 1" gap with ease. I'd imagine 3" x 3" is doable. Good on you for sistering the floor joist.

Is this product ok to use on my porch floor where it gets lots of traffic?

If the rotted-out section is properly prepared (say, by removing all damaged wood and applying a couple of coats of wood petrifier to soak the adjacent area), then yes, the epoxy paste will be equally as strong as wood and should withstand traffic. Just filling in the rot hole without treating the edges where it binds will eventually result in the "plug" separating. Be sure to paint or eurathane, etc. the finished, sanded repair.

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PC-Woody Wood Repair Epoxy Paste, Two-Part 12 oz in Two Cans, Tan

Product ID: 15488872

Details

Brand
PC Products
Item Form
Paste
Material
Epoxy Resin
Special Feature
High Tack Time
Specific Uses For Product
Repair

⏳30-40 min extended work time

🪵850 psi tensile strength

🌡️Service temp -20°F to 200°F

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Description

🛠️ Fix it once, fix it forever — the wood repair pros trust!

WEATHERPROOF WONDER - Resists UV, dry rot, fresh & salt water—perfect for indoor & outdoor fixes.
POST CURE VERSATILITY - Once cured, sand, drill, paint, or stain to seamlessly blend with your woodwork.
PRECISION APPLICATION - High tack formula prevents drips and sags, making overhead repairs effortless.
WOOD STRONG DURABILITY - Outperforms natural wood with 850 psi tensile strength for lasting repairs.
FLEXIBLE WORKING WINDOW - Extended 30-40 minute work time lets you reposition and perfect every repair.

PC-Woody is a two-part epoxy paste designed to permanently replace missing or rotted wood with superior structural strength. It offers excellent resistance to weather, UV, and water, with a high-tack formula that minimizes drips and sags. Suitable for indoor and outdoor use, it cures fully in 24 hours and can be sanded, drilled, or painted for a flawless finish.

Specifications

ASIN	B000H5O7Y8
Best Sellers Rank	#1,132 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #5 in Wood Filler
Brand	PC Products
Brand Name	PC Products
Color	Tan
Compatible Material	Wood
Container Type	Can
Customer Reviews	4.6 out of 5 stars 3,577 Reviews
Full Cure Time	24 hours hours
Global Trade Identification Number	00054983163337, 00549831633372
Included Components	(1) PC-Woody
Item Form	Paste
Item Package Quantity	1
Item Type Name	PC-Woody Wood Repair Epoxy Paste, Two-Part
Item Weight	12 ounces
Manufacturer	Protective Coating Co.
Material	Paste
Material Type	Paste
Model	16333
Number of Pieces	2
Other Special Features of the Product	High Tack, Extended Working Time, Weather Resistant, Versatile Post-Curing
Part Number	163337
Special Feature	High Tack, Extended Working Time, Weather Resistant, Versatile Post-Curing
Specific Uses For Product	Repair, Woodworking
Tensile Strength	850 psi
UPC	054983163337 549831633372
Unit Count	1 Count
Viscosity Level	Medium to High
Volume	12 fluid ounces
Warranty Description	Warranty
Water Resistance Level	Water Resistant

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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S$53

Duties & taxes included

In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to SINGAPORE.

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TrustScore 4.5 | 7,300+ reviews

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