Epoxy Putty Sticks | What They Can and Can't Do

Epoxy Putty Sticks | What They Can and Can't Do

Posted by Israel Oba on

The invention of the epoxy putty stick was a giant step forward, especially for do-it-yourselfers. To use them to their full advantage, make sure you pick the stick best designed for the specific repair job you’re about to do! Epoxy putty have recently become popular with 3D modelers who use the flexible material for filling gaps, cracks and imperfections in 3D printed models. It's typical use however is in domestic construction and repair as a sealant or filler. This article aims to help you understand more about this product and what it can and can’t do.

What is the history of Epoxy?

First, a bit of background: Epoxy putty sticks were invented by an entrepreneurial chemist in 1973. Several different ways of combining the two ingredients (the epoxy and the hardener) were tried, and the ultimate answer was a cylinder within a cylinder. The inner cylinder was the hardener, and the outer was the epoxy. This design keeps the two parts from reacting with one another until the putty is mixed. The hardener, which goes bad when exposed to air, was protected by the outer epoxy. This design lengthens the shelf life of the product.

The user simply cuts off as much as they want (giving the perfect amount of each ingredient), then kneads the coloured ingredients until they reach a consistent colour, ready for application. Using that technology, a whole line of application-specific epoxy putties was developed for a wide variety of uses. Today, there are specific products for the repair of wood, steel, concrete, aluminium, copper, plastic, and fibreglass, as well as a generic repair putty. A version for fibreglass repair that contains fibreglass actually bonds and cures underwater. While the original technology has been refined over the years, the basic principles remain the same.

What are they used for?

While epoxies are often used as adhesives, epoxy putties perform best when used as a permanent filler, replacing some other material that has been broken off, gouged out, or worn away from another product. They are not intended to perform tasks such as:

  • Towing and hauling very heavy loads.
  • Solving structural problems almost instantly, such as gluing a heavy shelf onto a wall.
  • Replacing the common adhesives that glue paper together.

 

epoxy stick

The best epoxy sticks are designed for specific end uses. Here the generic epoxy stick sinks to the bottom, while the stick made specifically to repair wood actually floats.

 

Unfortunately, the hyperbole all too common with epoxy sticks. One American TV infomercial indicates that its epoxy stick can stick a heavy shelf to a wall in seconds or be used to haul an "80,000-pound truck". Reputable manufacturers neither make such claims nor suggest such applications.

Epoxy sticks have thousands of uses and, when used for what they are designed, perform wonders. They are perfect for plugging knot holes in wood, replacing or rebuilding pieces broken off surfboards, filling chips in concrete, plugging holes in metal and plastic piping, closing breaks in metal gutters... the list is endless.

magnetic pull of steel epoxy stick vs generic

The epoxy stick designed for steel actually contains steel, so an ordinary magnet picks it up. The generic epoxy stick has no steel, so it is not only less strong but cannot recognise the magnetic force.

One size does not fit all

If you decide to purchase an epoxy stick, remember that reputable manufacturers have tailored their products to solve specific problems. A few examples:

  1. An epoxy stick for patching concrete that actually contains stone aggregate, giving an appearance that resembles concrete.
  2. An epoxy stick designed for wood repair that comes in various colours to match different woods. It can be sanded and stained or painted.
  3. An epoxy stick that contains steel for patching metal that is designed to adhere to steel and is magnetic. Note: Some epoxy sticks are coloured to appear as if they contained steel or other materials but do not.
  4. An epoxy stick for repairing boats that can be applied underwater while the boat is floating since it cures and creates a strong bond even if submerged. There is a wide variety of specialty epoxy sticks, each tailored to maximise its benefits for a specific task. No one generic stick is as good as any of the individual sticks.

bond strength of epoxy stick to steel epoxy

Note the first graph, which compares the bond strength of an epoxy stick designed for steel versus a generic stick. The steel stick has more than twice the strength of the generic. So, if bond strength with metal is what you want, avoid the generic brands.

underwater epoxy

Now look at the second graph, which compares the bond strength when applied underwater of the epoxy stick tailored for that type of application versus the generic stick. It’s more than 20 times stronger.

How to get the most out of an epoxy putty stick

Above all, choose the best stick for the job at hand (note: multi-purpose sticks are fine for some applications). You will usually find a specialty stick tailored for your repair job. In addition, follow these simple guidelines:

  1. Clean and prepare the surface to ensure good adhesion.
  2. Wear gloves while mixing (disposable rubber gloves are ideal). They help keep the putty clean as they protect your hands.
  3. Mix the two ingredients thoroughly. Make sure the putty achieves a uniform colour before applying.
  4. Pay attention to the cure time in the instructions. Waiting too long to use can reduce the effect you want.
  5. Apply pressure on the repair. Clamping a joint or applying pressure makes the bond stronger by assuring maximum surface contact.
  6. Be patient before returning the repaired part to service. Some putties continue to cure (and strengthen) over a few days.
  7. Protect the unused portion carefully. Resealing the package to prevent extra exposure to air helps save the putty for future use.
  8. Embellish the repair. A great benefit of these products is that they can be shaped, sanded, drilled, and painted to give you precisely the appearance you want, helping hide the fact that the part has been repaired.

The Jenolite range of epoxy putty includes, Plastic, Titanium, Aluminium, Steel, Copper and Underwater sticks. Specialty sticks tailored for specific tasks outperform generic alternatives, as illustrated by the bond strength comparisons in the graphs. 

To maximise the benefits of epoxy putty sticks, users should select the appropriate stick for the job, clean and prepare the surface, wear gloves during mixing, ensure thorough mixing for uniform colour, follow curing time instructions, apply pressure for stronger bonds, exercise patience before returning the repaired part to service, and carefully protect the unused portion for future use. These products can be shaped, sanded, drilled, and painted to achieve the desired appearance, making them a valuable tool for do-it-yourselfers when chosen with care for specific repair needs.

← Older Post

Epoxy Putty

RSS
epoxy how to guide and FAQ

Metal Epoxy Putty: 4 Different Types

By Connor Heaps

Epoxy putty is great for performing small repairs to a range of different materials, including metal. Mouldable and easy to use, epoxy putties dry quickly,...

Read more
How to fill holes in wood with epoxy - Jenolite

How to fill holes in wood with epoxy

By Ben Spargo

Holes can appear in wood for a variety of reasons. Some result from how the wood has naturally grown and others are caused by things...

Read more
£14.99 Sale Save
Version Plastic

Item is in stock Only 0 left in stock Item is out of stock Item is unavailable

  • SIMPLE TO USE: Two part epoxy putty that can be hand mixed and applied
  • FAST ACTING: Ready to use in minutes, typically fully functional in 60 minutes (review technical data sheet for exact timings)
  • MULTI-SURFACE APPLICATIONS: Metal / Plastic / Fiberglass / Ceramic / Etc
  • INDOOR & OUTDOOR USE: Suitable for interior and exterior use
  • WEATHER PROOF & RESISTANT TO CORROSION: Resistant to water, chemicals and temperature extremes
  • EASY TO USE: Easy to mould to join, rebuild and repair most surfaces 
  • DURABLE: Once cured it is fully waterproof and can be sanded and painted
  • MADE IN BRITAIN
JENOLITE Epoxy Putty Sticks are a range of two part epoxy sticks that can be used to rebuild and repair most metals, plastics, fiberglass, ceramics, etc. The easy to use sticks can be hand mixed to create a polymer compound that can be moulded, wrapped or used to join components or build up and repair just about anything. Once fully cured it is completely waterproof and can be sanded, sawn, drilled and painted over.
  • PLASTIC EPOXY PUTTY: Plastic Epoxy Putty Stick is a two component epoxy stick, that can be used to repair and rebuild most plastics. The hand-mixable, fast-setting epoxy resin putty forms a durable bond to most major plastic types. After mixing it creates a polymer compound that can be moulded, wrapped around, or used to build up and repair just about anything made from rigid or semi-flexible plastic.
  • TITANIUM EPOXY PUTTY: A non-rusting, titanium reinforced epoxy resin putty that quickly repairs or rebuilds anything made of metal. Ideal for repairing cracked, snapped and holed metal, it offers an industrial strength solution. Suitable for high temperature use – up to 280°C. Functional after 60 mins, once fully cured it is completely waterproof and can be drilled, tapped, machined, ground, filed and even painted.
  • ALUMINIUM EPOXY PUTTY: A non-rusting, aluminium reinforced epoxy putty. This putty quickly repairs or rebuilds anything made of metal. The two part epoxy resin can be mixed by hand and applied directly to the area that needs repairing or rebuilding. Ideal for repairing scratched, chipped and cracked metal. Once fully cured the putty can be drilled, tapped, machined, ground, filed and even painted. Easy to use, and essential for any mechanic's store cupboard!
  • STEEL EPOXY PUTTY: A non-rusting, steel reinforced epoxy putty that quickly repairs or rebuilds anything made of metal. The two part epoxy resin can be mixed by hand and applied directly to the area that needs repairing or rebuilding. Ideal for repairing scratched, chipped and cracked metal. It offers an industrial strength solution that can withstand temperatures up to 149°C.  Functional after 60 mins, once fully cured it is completely waterproof and can be drilled, tapped, machined, ground, filed and even painted.
  • COPPER EPOXY PUTTY: A two component epoxy resin stick, that can be used to repair pipes, tanks, hot pipes and vessels made of brass, copper, bronze and other non ferrous metals. Ideal for plumbing elbows, sink taps and water heaters. Will also seal freeze breaks in pipework. The hand-mixable, fast-setting epoxy putty forms a durable bond that after mixing creates a polymer compound that can be moulded to fit. Once fully cured it is completely waterproof and can be sanded and painted over. Ideal for plumbing emergencies such as repairing leaking hot lines. Perfect for pipe repair and plumbing applications, Jenolite's copper epoxy putty stick is the essential plumber's epoxy. Applications include plumbing elbows, sinks, taps, and water heaters. It can be used on brass, copper, bronze, and other non-ferrous metals.
  • UNDERWATER EPOXY PUTTY: A hand-mixable, specialty epoxy putty for repairs to damp, wet areas and underwater surfaces. After mixing, the epoxy resin forms a polymer compound that may be applied underwater (either fresh or salt water) and will bond tenaciously to substrates such as fiberglass, concrete. Ideal for marine repairs and repairs to damp, wet and underwater surfaces, such as holes, cracks, leaks and gouges in decks and hulls, swimming pools, hot tubs, spas, recreational equipment, as well as leaking tanks and gutters.  Full functional after 60 mins, once fully cured it is completely waterproof and can be drilled, tapped, machined, ground, filed and even painted.

Plastic Epoxy Putty Stick is a two component epoxy stick, that can be used to repair and rebuild most plastics. The hand-mixable, fast-setting epoxy resin putty forms a durable bond to most major plastic types. After mixing it creates a polymer compound that can be moulded, wrapped around, or used to build up and repair just about anything made from rigid or semi-flexible plastic.

A non-rusting, titanium reinforced epoxy resin putty that quickly repairs or rebuilds anything made of metal. Ideal for repairing cracked, snapped and holed metal, it offers an industrial strength solution. Suitable for high temperature use – up to 280°C. Functional after 60 mins, once fully cured it is completely waterproof and can be drilled, tapped, machined, ground, filed and even painted.

A non-rusting, aluminium reinforced epoxy putty. This putty quickly repairs or rebuilds anything made of metal. The two part epoxy resin can be mixed by hand and applied directly to the area that needs repairing or rebuilding. Ideal for repairing scratched, chipped and cracked metal. Once fully cured the putty can be drilled, tapped, machined, ground, filed and even painted. Easy to use, and essential for any mechanic's store cupboard!

A non-rusting, steel reinforced epoxy putty that quickly repairs or rebuilds anything made of metal. The two part epoxy resin can be mixed by hand and applied directly to the area that needs repairing or rebuilding. Ideal for repairing scratched, chipped and cracked metal. It offers an industrial strength solution that can withstand temperatures up to 149°C.  Functional after 60 mins, once fully cured it is completely waterproof and can be drilled, tapped, machined, ground, filed and even painted.

A hand-mixable, specialty epoxy putty for repairs to damp, wet areas and underwater surfaces. After mixing, the epoxy resin forms a polymer compound that may be applied underwater (either fresh or salt water) and will bond tenaciously to substrates such as fiberglass, concrete. Ideal for marine repairs and repairs to damp, wet and underwater surfaces, such as holes, cracks, leaks and gouges in decks and hulls, swimming pools, hot tubs, spas, recreational equipment, as well as leaking tanks and gutters.  Full functional after 60 mins, once fully cured it is completely waterproof and can be drilled, tapped, machined, ground, filed and even painted.