The best 2-part epoxy filler depends on the gap and material: PC-Woody is made for replacing missing or rotted wood, while Gorilla epoxy offers clear gap-filling for household repairs. J-B Weld KwikWeld is a better fit when a dark-gray, fast-setting repair is suitable. The picks below compare their formats, set times, and intended uses so you can choose a filler that matches the job.
| Product | Best For | Key Difference |
|---|---|---|
| Gorilla 0.85 oz Epoxy | Clear, small repairs | Five-minute set; fills gaps |
| J-B Weld KwikWeld | Fast repairs needing a dark-gray finish | Six-minute set; 1:1 syringe |
| PC-Woody 12 oz | Larger wood repairs | Two-part paste in two cans |
| PC-Woody 6 oz | Smaller wood repairs | Two-part paste with mixing tool |
| Gorilla Epoxy, Pack of 2 | Repeat clear epoxy repairs | Two 0.85-ounce syringes |
Gorilla 5-Minute Epoxy, 0.85 Ounce
This Gorilla two-part epoxy is best for household or automotive fixes where a clear finish and gap-filling ability matter. The product features a five-minute set time, which allows some time for repositioning, and is described as suitable for voids and uneven or vertical surfaces. Its single applicator keeps the package compact for occasional repairs.
Why it stands out: It combines clear-drying epoxy with gap-filling use, making it a versatile choice when the repair may remain visible.
Consider: The 0.85-ounce size is a small-format option, so it may not suit a large repair requiring substantial filler. Its five-minute set time also calls for preparing the repair area and tools before mixing.
J-B Weld KwikWeld 6-Minute Epoxy
Choose KwikWeld for a fast-setting repair where a dark-gray cured color is acceptable. The epoxy uses a syringe for a 1:1 mix ratio and comes with a mixing tray and stir stick. It sets in six minutes and has a stated cure time of four to six hours. Listed uses include DIY household, automotive, marine, and craft repairs.
Why it stands out: The resealable syringe is designed for multiple uses, and the stated tensile strength is 4,360 PSI.
Consider: Its dark-gray set-and-cure color may be noticeable on light or appearance-sensitive surfaces. The six-minute set time leaves a limited window for adjustments.
PC-Woody Wood Repair Epoxy, 12 Ounces
PC-Woody is the most targeted option here for replacing missing or rotted wood. This 12-ounce two-part paste comes in two cans and is intended for indoor and outdoor applications. Its high tack helps reduce drips and sags while the paste hardens. The listed application temperature range is 35 to 115 degrees Fahrenheit, and the service temperature range is minus 20 to 200 degrees Fahrenheit.
Why it stands out: Its wood-repair purpose and larger listed quantity make it a practical choice for more substantial wood restoration than a small syringe repair.
Consider: It is tan and formulated as wood repair paste, so choose a different product when a clear finish or a general-purpose liquid epoxy is needed.
PC-Woody Wood Repair Epoxy, 6 Ounces
This smaller PC-Woody kit is best for wood repairs that call for a paste but do not require the 12-ounce package. It is a two-part tan epoxy supplied in two cans with a mixing tool. Like the larger kit, it is described as resistant to dry rot, UV light, and fresh and salt water. Its application and service temperature ranges are also listed as 35 to 115 degrees Fahrenheit and minus 20 to 200 degrees Fahrenheit, respectively.
Why it stands out: It offers the same stated wood-repair features in a smaller package, making it the better choice when the repair scope is limited.
Consider: The smaller quantity may not be appropriate for extensive wood replacement. Its tan paste is not a clear filler for finish-matching needs.
Gorilla Clear Epoxy, Two-Pack
This Gorilla pack is best for buyers who want clear, gap-filling epoxy available for more than one repair. It includes two 0.85-ounce syringes, and the epoxy has a five-minute set time. Listed uses include household and automotive repairs; the formula is also described as able to fill voids and bond uneven or vertical surfaces.
Why it stands out: It offers the same clear-drying and gap-filling features as the single Gorilla applicator, with two syringes in the pack.
Consider: Each syringe is 0.85 ounces, so this remains a small-format option rather than a bulk wood-repair paste. Plan the work before mixing because it sets in five minutes.
Buying Guide: How to Choose a 2-Part Epoxy Filler
Are you filling wood damage or a general-purpose gap?
For missing or rotted wood, choose a wood-specific paste such as PC-Woody. Its high-tack formula is intended to reduce drips and sags as it hardens. For household or automotive repairs where a clear result and gap filling are priorities, consider Gorilla epoxy. KwikWeld covers several listed repair categories, but its dark-gray finish should factor into the choice.
How much working time do you need?
Both Gorilla options list a five-minute set time, while KwikWeld lists six minutes. These set times make preparation important: identify the surfaces to repair and have the supplied or appropriate mixing materials ready before combining the parts. The listed cure time for KwikWeld is four to six hours; do not treat its six-minute set time as the full cure time.
Which package size and format fit the job?
Small syringes are convenient for limited repairs and provide measured delivery; KwikWeld specifically lists a 1:1 ratio syringe and a resealable cap. PC-Woody comes in two cans as a paste, in 6-ounce and 12-ounce kit options. Match the package to the repair rather than assuming a small syringe will cover a large damaged area.
Does color or exposure matter?
Gorilla is described as drying clear, KwikWeld cures dark gray, and PC-Woody is tan. PC-Woody lists resistance to dry rot, UV light, and fresh and salt water, along with application and service temperature ranges. Check the product details and surface requirements before use; the listed features do not establish suitability for every repair condition.
Frequently Asked Questions
What is the best 2-part epoxy filler for rotted wood?
PC-Woody is the most directly suited option in this selection because it is described as a paste for replacing missing or rotted wood.
Which option dries clear?
The two Gorilla epoxy products are described as drying clear. KwikWeld cures dark gray, and PC-Woody is tan.
Can 2-part epoxy fill gaps?
Gorilla lists gap filling as a feature, including filling voids and bonding uneven or vertical surfaces. Choose the product based on the repair material and finish needs.
How long does KwikWeld take to cure?
KwikWeld is listed as setting in six minutes and curing in four to six hours. Set time and cure time are different stages.
Should I choose the 6-ounce or 12-ounce PC-Woody kit?
Choose the 6-ounce kit for a smaller wood repair and the 12-ounce kit when the repair requires more paste. Both listings describe a two-part tan wood-repair epoxy.