Category Archives: Plastic

On the left is a typical propane torch flame. On the right is one with a flame spreader attachment. The highlighted sections indicated the optimal zone for flame treating plastics.

Flame Treating Plastics

Above: The highlighted sections indicated the optimal zone for flame treating plastics. On the left is a typical propane torch flame. On the right is one with a flame spreader attachment. 

by Terry Monville – GBI Technical Advisor

It’s no secret that bonding to plastic can be a challenge. Identifying what type of plastic you are working with—ABS, PVC, HDPE, LDPE, UHMWPE, and this list goes on—is your first step. Continue reading

G/flex 655-1 Epoxy in a dual syringe

G/flex® 655 Epoxy

Now in a Convenient Dual Syringe

Versatile G/flex Thickened Epoxy Adhesive is now available in a dual syringe for convenient dispensing. The G/flex 655-1 syringe contains 0.42 oz. of resin and 0.42 oz. of hardener, the perfect amount to keep on hand for small repair jobs. Depressing the plunger on the dual syringe dispenses the proper 1:1 ratio of G/flex resin and hardener. Continue reading

which epoxy is recommended? WEST SYSTEM 105 Resin and G-flex epoxies

105 or G/flex?

Take the quiz

By Don Gutzmer – GBI Technical Advisor

“Should I use the 105 System or G/flex® Epoxy for my project?” This is a great question. Here’s what a Technical Advisor thinks about when recommending one type of WEST SYSTEM® Epoxy over another. Let’s start by comparing the handling characteristics and mechanical properties of both the 105 System and G/flex. This will show you the advantages of each and when one system is better suited over another for your project. Continue reading

Big Red Gets His Smile Back

By Tom Pawlak — GBI Technical Advisor

My neighbor Rollie is always coming up with these unbelievable deals along the highway between his home in Bay City, Michigan, and his cabin a couple hours north. The latest super deal was a big red garden tractor that was mechanically in near perfect working order—except the previous owner ran it into something and busted up the grille. He brought it over and asked if it could be fixed. Heres how we repaired “Big Red.” Continue reading

Azek® PVC Deck Boards

An option in boat construction or repair?

By Bruce Niederer — GBI Technical Advisor

Wood has always been used in fiberglass boat construction, in stringers and oftentimes as core in high compression areas such as under cleats, stanchions and winches. Wood works great in these applications but we all know that the big problem with wood is the fact that it rots if it gets wet. Here at Gougeon Brothers, Inc. (GBI) we have spent long hours writing manuals and training people to use proper techniques using epoxy to keep wood dry and strong. Continue reading

Will It Stick?

By Mike Barnard

Many times each day we get questions about sticking to various substrates.  Most questions are on something that we have already tested, so we check our large database and advise on how best adhere to the surface.  Other times the request is unique and we are unsure if WEST SYSTEM® Epoxy will stick to it or not.  In the event we do not have any experience bonding to a material, we recommend testing adhesion.  Many times this means gluing a wood block to the surface, then pulling the Continue reading

A G/flex Modified Snow Shovel

By Tom Pawlak — GBI Technical Advisor

This winter (2011) in Bay City, Michigan, we’ve seen a couple of big snowfalls and lots of small ones with 1″ to 2″ of accumulation. Not enough snow to bother breaking out the snowblower, so I usually shovel it by hand. About 10 years ago I fell in love with the plastic snow shovels that are lightweight and the snow slides off of them easily compared to the metal snow shovels that are heavy and snow clings to stubbornly.

My problem with plastic shovels is they wear out after one or two seasons at best because my driveway is made of fiber-reinforced concrete. It is like a huge piece of 80-grit sandpaper waiting to devour my plastic shovels. Continue reading

Repairing a Plastic Hatch with G/Flex

By Tom Pawlak — GBI Technical Advisor

A local sailor stopped by our shop with an old plastic hatch that was slightly warped and badly cracked. He hadn’t been able to find a similar hatch to replace it. He wondered if we had an epoxy that could be used to repair the hatch. I said G/flex would likely work but to know for sure we needed to do a bit of adhesion testing. Continue reading

Plastic Engine Cover Repair

By Jeff Wright — Vice President of Technical Services

My wife’s 2000 Audi TT has a very sleek shape, and these smooth lines are carried under the hood with molded plastic engine covers that provide a very clean-looking engine. Unfortunately, when I was servicing a burned-out bulb, I attempted to remove the covers in the wrong sequence which caused a tab to snap off.   Continue reading

Gluing Plastic with G/flex Epoxy

By Tom Pawlak — GBI Technical Advisor &  Jeff Wright — Vice President of Technical Services

One of our goals for G/flex® was an ability to bond to a variety of plastics. This was an ambitious goal because plastics historically have been used as mold release surfaces for epoxy, allowing it to release from the plastic when cured. While developing G/flex, we tested adhesion to a number of plastics with a variety of surface prep methods. We discovered that some plastics need only be abraded for good adhesion to take place. Other plastics required Continue reading