Using adhesives pt. 2

Using adhesives pt. 2

In the first part of this series we learned about multipurpose adhesives.  Today we learn about wood and plastic glues, along with some basic tips. If you would like to view the entire presentation, take a look at our YouTube channel.

Wood Glues

Wood glues are specifically made for wood repair projects. Here are your main choices:

Yellow glue (aliphatic resin or carpenters’ glue): Aliphatic resin glue is a yellow liquid, usually sold in plastic squeeze bottles and often labeled as carpenters’ glue. Yellow glue is very similar to white glue but forms a slightly stronger bond. It is also slightly more water resistant than white glue. Clamping is required for about 30 minutes until the glue sets; curing time is 12 to 18 hours. Yellow glue dries clear but does not accept wood stains.

yellow glue

Plastic resin glue (urea formaldehyde): Plastic resin glue is recommended for laminating layers of wood and for gluing structural joints. It is water resistant but not waterproof and isn’t recommended for use on outdoor furniture. This glue is resistant to paint and lacquer thinners. Clamping is required for up to 8 hours; curing time is 18 to 24 hours.

Resorcinol glue: This glue is waterproof and forms strong and durable bonds. It is recommended for use on outdoor furniture, kitchen counters, structural bonding, boats, and sporting gear. It can also be used on concrete, cork, fabrics, leather, and some plastics. Resorcinol glue has excellent resistance to temperature extremes, chemicals, and fungus. Clamping is required; curing time is 8 to 24 hours, depending on humidity and temperature.

Adhesives for Glass and Ceramics

Most multipurpose adhesives will bond glass and ceramics, but specialized versions often bond them more securely.

China and glass cement: Many cements are sold for mending china and glass. These cements usually come in tubes. Acrylic latex-base cements have good resistance to water and heat. Clamping is usually required.

Silicone rubber adhesives: Only silicone adhesives made specifically for glass and china are recommended. They form very strong bonds, with excellent resistance to water and temperature extremes. Clamping is usually required.

 

Metal Adhesives and Fillers

Need to make a repair in metal? Here are some popular adhesives that can make a strong bond with metal:

Steel epoxy: A two-part compound sold in tubes, steel epoxy is quite similar to regular epoxy. It forms a very strong, durable, heat-and water-resistant bond and is recommended for patching gutters and gas tanks, sealing pipes, and filling rust holes. Drying time is about 12 hours; curing time is one to two days.

Steel Putty: This metal putty consists of two putty-consistency parts that are kneaded together before use. It forms a strong, water-resistant bond and is recommended for patching and sealing pipes that aren’t under pressure. It can also be used for ceramic and masonry. Curing time is about 30 minutes; when dry, it can be sanded or painted.

Plastic metal cement: Plastic metal is one-part adhesive and filler. It is moisture resistant but cannot withstand temperature extremes. This type of adhesive is recommended for use on metal, glass, concrete, and wood, where strength is not required. Curing time is about four hours; when dry, plastic metal cement can be sanded or painted.

Plastic Adhesives

Plastics present a special problem with some adhesives because solvents in the adhesives can dissolve plastic. Here are some popular plastic adhesives.

Model cement: Usually sold in tubes as “model maker” glues, model cement forms a strong bond on acrylics and polystyrenes and can be used on most plastics, except plastic foam. Clamping is usually required until the cement has set (about 10 minutes); curing time is about 24 hours. Model cement dries clear.

Vinyl adhesive: Vinyl adhesives, sold in tubes, form a strong, waterproof bond on vinyl and on many plastics, but don’t use them on plastic foam. Clamping is usually not required. Vinyl adhesive dries flexible and clear; curing time is 10 to 20 minutes.

Acrylic solvent: Solvents are not adhesives as such; they act by melting the acrylic bonding surfaces, fusing them together at the joint. They are recommended for use on acrylics and polycarbonates. Clamping is required; the bonding surfaces are clamped or taped together, and the solvent is injected into the joint with a syringe. Setting time is about five minutes.

Glue Failure

Here are some causes of glue failure:

Hopefully you now have a basic understanding of how to identify and use adhesives.  As previously mentioned, you can view the YouTube video containing the full powerpoint presentation HERE.  We would greatly appreciate you subscribing to our channel. If there are any particular topics you would like to see covered please Send us an email.

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