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Category Archives: Adhesives

UL® Classification of Pipe Sealants (thread sealants)

UL® performs various tests to determine the suitability of pipe sealants for a particular use.  The UL® classification does not state the strength of the product or the maximum sealing pressure for other uses. For example, Permabond LH050 is classified by Underwriters Laboratories Inc.® for use in devices handling gasoline, petroleum oils, and natural gas (pressure...

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How much is “enough” when it comes to adhesive?

More adhesive isn’t necessarily better when you want an effective bond or seal. Covering the bond surface is the main requirement. The type of adhesive and the bonding environment have a lot to do with how much is “enough” and how much less or extra will cause adhesive failure. Adhesive failure is a common issues when using too much adhesive. Following are some e...

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Strong Adhesive – Permabond’s Experience

Over the holidays, I was visiting with a cousin from out of town that was talking about her new job.  I remembered that she had a new job last year too, so I asked her why she changed jobs again.  She said, “I don’t know how you’ve stayed with the same company for 20 years – don’t you get bored?” "Not yet" I said, because this happens to be one of the most i...

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Weld sealant finds new uses in heavy equipment repair

At Permabond we are reminded by our friends in the fire protection industry how valuable our weld sealant is to their work.  At the last AFSA convention, our team was approached by many contractors and fabricators who stopped by our booth just to say thank you for such a valuable product.  So when I glanced at an email that came through from a fire protection contractor...

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Plastic Adhesive: Best Adhesives for Bonding Plastic

What is the best adhesive for plastic?  Often the strongest glue for plastic may not be the best adhesive for plastic.  There are a variety of factors to consider when choosing the best plastic glue.  Obviously bond strength is at the top. For most plastic bonding applications cyanoacrylate adhesives, UV curable adhesives, MMAs, as well as some epoxy and structu...

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PPE-How to protect your skin when working with adhesives

Proper PPE personal protection equipment is described in section 8 of the adhesive SDS.  Basic personal protection from adhesives includes wearing the right gloves and washing your hands with soap and water.  Following are two substitutions in PPE that can do more harm than good. Nitrile gloves are a good choice for most adhesive products. Choose a size that is com...

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What are structural, tough, second generation, & reactive acrylics?

What is the difference between a structural, toughened, second generation, and reactive acrylics? They are all structural acrylics!  Adhesives have so many common and technical names it can be difficult to know how to compare them. Structural adhesives are adhesives that form bonds that can bear a structural load. Generally structural adhesives are epoxy or acrylic...

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Original adhesive containers only please!

I recently sat in on a meeting regarding redesigning a cap for one of our adhesive products.  I had expected the meeting to be a real snooze.  The real science is the adhesive in the bottle, not the bottle itself – right?  I was surprised at all of the material science and engineering that goes into a new design.  Adhesive packaging for optimum shelf life, safety, e...

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High Temp resistant adhesives which withstand paint-bake processes

Often adhesives are not considered suitable candidates for joining structural assemblies that need to go through a paint-bake or stoving process due to the brief exposure to high temperature (around 200°C / 390°F for 10-15 minutes). However, there are many temperature resistant adhesives which can resist these conditions for this brief duration - providing the joint is ...

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Metal bonding epoxy adhesives are some of the strongest glue for metal

          We are often asked “What is the strongest glue for metal to metal?”  For most applications the strongest metal glue is one part metal bonding epoxy also known as heat activated epoxy (heat curing epoxy).  Typical bond strengths of three adhesive types are compared below. Strongest metal glue? Adhesive Type ...

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