Best Adhesives for Bonding to HDPE Plastic

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Members widely agree that bonding to HDPE (high-density polyethylene) is notoriously difficult, with most adhesives failing to create a reliable hold. One experienced RVer notes that nothing truly adheres to HDPE long-term, recommending mechanical fasteners instead for critical applications. However, several members suggest possible workarounds for less demanding uses: Loctite Black Max (380) with primer (770), 3M spray adhesives (77 or 90), and Gorilla construction adhesive are mentioned as... More...

Cheezewhiz

Senior Member
Joined
Mar 9, 2021
Posts
206
Less obnoxious than my last question, fuelled by entirely different dipshittery!

What kind of adhesive bonds, or a least sticks like an absolute bastard, to HDPE? something I can laminate a couple layers over with uh, denim or something as a substrate.

I cannot actually find a website that tells me this that isn't a bullshit AI written pile of garbage.

Sorry not sorry, I do not and will not trust the lying machine that has poisoned the vast majority of what's left of the internet
 
I've used Black Max (loctite 380) on a lot of plastic to metal joints, but it's best with a primer (loctite 770). Anything more that that and you're into specialty industrial adhesives.

If you're laminating denim to HDPE, you might experiment with a spray contact adhesive like 3M 77 or better yet, 3M 90.
 
The boat ****er forum I'm on is primarily recommending Gorilla construction adhesive, for yall's info, and I haven't tried anything just yet.

Intend to update
 
Here's something: Bonding Low & High Density Polyethylene with Industrial Adhesives

How much force does the bond need to withstand? Is it just interior decoration?

I work in soft drink bottling. We use a special hot melt glue to attach labels to PET bottles. We splice(d) label rolls (attach the start of one roll to the end of another) with very expensive double-sided tape with silicone adhesive, about $80 per roll the size of a normal 1" masking tape roll. You could use a tape with silicone on the HDPE side and something normal on the denim side. www.Findtape.com is usually very helpful. 3M discontinued my preferred tape, so I'm getting by with another 3M tape with acrylic adhesive that's much cheaper at McMaster, item 7602A53, because silicone double-sided tape has gotten really hard to buy. I tried pretty much every tape I could find that sounded like it might work, and most of them didn't work worth a crap. That was many hundreds of dollars spent on research.
 

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