PEPermatex
Permatex
Permatex 84145 PermaPoxy 5 Minute Plastic Welder
- 2-part plastic-specific epoxy
- Waterproof
- 5-minute set
- Works on most plastics
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On this page
Is the Permatex 84145 PermaPoxy 5 Minute Plastic Welder worth it?
Yes, for the right buyer. The Permatex 84145 PermaPoxy 5 Minute Plastic Welder ranks #1 in our Best Waterproof Adhesive for Plastic 2026 list (best overall). Its biggest strength: plastic-specific chemistry - standard epoxies do not bond many plastic types. The main caveat: does not bond polyethylene (PE) or polypropylene (PP) without surface preparation.
Overview
What the Permatex 84145 PermaPoxy 5 Minute Plastic Welder does well
Requires mixing Best waterproof plastic adhesive. The highlights are plastic-specific chemistry - standard epoxies do not bond many plastic types and waterproof cure - holds in outdoor exposure and submersion. One caveat, does not bond polyethylene (PE) or polypropylene (PP) without surface preparation.
Specs that matter
Key features
- 2-part plastic-specific epoxy
- Waterproof
- 5-minute set
- Works on most plastics
The trade-offs
Pros & cons
Pros
- Plastic-specific chemistry - standard epoxies do not bond many plastic types
- Waterproof cure - holds in outdoor exposure and submersion
- 5-minute set - handling strength in 5 minutes
- Permatex automotive grade - proven outdoor durability
Cons
- Does not bond polyethylene (PE) or polypropylene (PP) without surface preparation
Fit check
Should you buy the Permatex 84145 PermaPoxy 5 Minute Plastic?
Buy it if you're…
- Shopping for plastic 2026
Think twice if this matters to you
- Does not bond polyethylene (PE) or polypropylene (PP) without surface preparation
Where it ranks
Featured in 1 best-of list
| List | Rank |
|---|---|
| Best Waterproof Adhesive for Plastic 2026· Best Overall | #1 / 10 |
Cross-shop
Alternatives to the Permatex 84145 PermaPoxy 5 Minute Plastic Welder
Products ranked near it in our research, each better for a slightly different buyer.
- Best OverallGorilla
Gorilla Super Glue Gel
- Gel formula, no-run on vertical surfaces
- 45-second handling time
Buying advice: adhesives
- Porous materials like wood, paper and fabric bond well with water-based glues. Non-porous ones like metal, glass and most plastics need epoxy, cyanoacrylate or a polyurethane adhesive. Polyethylene and polypropylene resist almost everything, so check the label lists them.
- Thin glues need parts that meet closely. If the joint is loose or the surfaces are uneven, epoxy or polyurethane glue fills the gap and still holds.
- Fast-setting glue is convenient for small fixes but leaves no time to adjust a big assembly. For furniture and glue-ups, a longer open time is worth more than speed.
- Standard PVA softens with moisture. For outdoor projects, cutting boards or anything washed often, look for a water-resistant (Type II) or waterproof (Type I) rating, or use epoxy.
- Once opened, super glue and some epoxies thicken within months. Smaller bottles that you finish quickly often work out cheaper than a big one that goes off.
Answers
Permatex 84145 PermaPoxy 5 Minute Plastic Welder: common questions
Is the Permatex 84145 PermaPoxy 5 Minute Plastic Welder worth buying?
Yes, for the right buyer. The Permatex 84145 PermaPoxy 5 Minute Plastic Welder ranks #1 in our Best Waterproof Adhesive for Plastic 2026 list (best overall). Its biggest strength: plastic-specific chemistry - standard epoxies do not bond many plastic types. The main caveat: does not bond polyethylene (PE) or polypropylene (PP) without surface preparation.
Who is the Permatex 84145 PermaPoxy 5 Minute Plastic Welder best for?
Based on our research it suits plastic 2026. It's ranked #1 of 10 in our Best Waterproof Adhesive for Plastic 2026 list.
What are the downsides of the Permatex 84145 PermaPoxy 5 Minute Plastic Welder?
The main trade-offs owners and reviewers point to: does not bond polyethylene (PE) or polypropylene (PP) without surface preparation.
What are the key features of the Permatex 84145 PermaPoxy 5 Minute Plastic Welder?
2-part plastic-specific epoxy, Waterproof, 5-minute set and Works on most plastics.
What are the best alternatives to the Permatex 84145 PermaPoxy 5 Minute Plastic Welder?
Worth comparing: Weld-On 16 Plastic Cement, Gorilla Super Glue Gel and E6000 Craft Adhesive. Each ranks near it in our research for a slightly different buyer.
Where can I buy the Permatex 84145 PermaPoxy 5 Minute Plastic Welder?
It's sold on Amazon. Prices and stock change often, so check the current listing before you buy, our link takes you straight to it.