Weldbond Best Mosaic Adhesive

Weldbond is a polyvinyl acetate (PVA) adhesive, and there are other brands of PVAs on the market.

Why is Weldbond preferred by many mosaic artists, and why does Mosaic Art Supply’s online information refer to Weldbond as “the best” mosaic adhesive?

Weldbond is thick, and the extra viscosity can be invaluable for taking the frustration out of doing detailed mosaic work. It’s nearly impossible to avoid bumping tiles as you work, and the thicker the glue, the less they move.

Strength and Durability

Like most any water-based adhesive, Weldbond ruins if it freezes before use, but the following explains why we recommend Weldbond based on its strength in cold weather.

weldbond adhesive 160ml
Weldbond Adhesive 160ml (5.4oz) the best mosaic glue made.

Artist Joe Moorman decided to carry Weldbond when he started Mosaic Art Supply in 2002. It was the thickest, strongest PVA adhesive he had ever used, and he had learned from other artists that Weldbond had been certified for use in space by NASA, where adhesives need to withstand cold temperatures.

Joe paid for his engineering degree by working a sequence of internships for a major aerospace company. One of the internships was in materials testing lab, where Joe observed how effective cold temperatures were for destroying things, including sophisticated high-performance aerospace adhesives.

Joe figured that since Weldbond was made in Canada, the people making and testing it probably had more first-hand experience with glues becoming brittle and cracking in low temperatures. Also, the certification by NASA for use in space had to mean that Weldbond had been well tested by a third party, possibly several parties.

Joe recommends Weldbond now more than ever because he has been able to see how well his own mosaics have lasted, even the unfinished and abandoned pieces that have been stored in outside garages for years.

In early 2011, Joe attempted to recycle an unfinished, ungrouted mosaic made on a 2 ft x 4 ft plywood panel back in 2005. The mosaic was soaked in water and detergent for a month or two, but most of the materials (glass, ceramic and stone) had to be pryed of with a screwdriver, and even the small pieces usually broke instead of coming free from the Weldbond.

Mosaic Art Supply sells Weldbond in convenient 160 ml and 420 ml bottles for studio work and 3 litre jugs for more economical refills.

Weldbond securely bonds to wood, glass, fabric, linoleum, styrofoam, concrete and other art materials. It is water-based, non-toxic, dries clear and is very water-resistant when fully cured.

Weldbond Glue Mosaic Adhesive 160ml (5.4 oz)

weldbond adhesive 160ml

The 160ml (5.4 oz) bottle of Weldbond Glue Mosaic Adhesive is the convenience size of the product and is ideal for people looking for a small application bottle to minimize strain on their wrists. It covers up to 19 square feet depending on surface roughness.

Weldbond is an extremely versatile glue that can be used to securely bond a wide range of art materials including glass, natural-fiber fabrics and wood. Weldbond is strong, even at low temperatures, but LIQUID Weldbond will ruin if allowed to freeze. DO NOT ORDER DURING HARD FREEZES OR STORE OUTDOORS. Dries clear.

Weldbond Glue Mosaic Adhesive 160ml (5.4 oz)

Weldbond is an amazing product:

  • clear drying.
  • strong bonding.
  • non-toxic.
  • non-flammable
  • no volatile fumes. less than 1% VOCs by weight.
  • water-resistant once fully cured.
  • easy clean-up with soap and water.
  • can be added to grouts to improve strength and fracture toughness.

Product Specifications

Read the manufacturer’s specifications and instructions here.

Weldbond Glue is a white PVA (Poly Vinyl Acetate) adhesive that dries clear. It does not contain formaldehyde, latex, phthalates, aromatic solvents or halogenated solvents (as do many adhesives). It is non-toxic and conforms to ASTM D4236.

Product Coverage

The 160ml (5.4 oz) bottle of Welbond covers about 9 square feet IN THEORY. Actual coverage is about 20% less than that for most users doing detailed work, but messy users or coarsely porous substrates could require significantly more glue. The coverage is greatly affected by how neatly you work, how dry your working conditions are, etc. For example, if the heat is running at the height of winter, then water-based glues can skin over rapidly, and you tend to waste a little bit as it dries on your fingertips and tools.

Use In Mosaic Art

We use Weldbond Glue for presealing wooden surfaces before mosaic work, and we will sometimes dilute it with as much as 1 part water to 2 parts glue. For attaching the tiles in detailed mosaic work, the thicker material provided by straight Weldbond is better.

Why Not Use Other Brands?

There are other brands of white PVA adhesives on the market. The reason that Weldbond is strongly preferred by many mosaic artists is simple:

  • Detailed mosaic work requires that small tiles be positioned carefully.
  • This is often difficult to do this without bumping other small tiles already in place.
  • The thicker the glue, the less the tiles move when bumped.

In other words, Weldbond is “best” because it can take a lot of the frustration out of the work. There are also several other reasons why we think Weldbond might be more durable in adverse conditions.

Limitations

Dry Indoor Use

Weldbond is water-resistant when fully cured, but it does soften when soaked in water over time, so use good judgment. Mosaics in wet locations such as pools and fountains and patios should be made with thinset bonding mortar (a type of sticky concrete) instead of adhesive.

Other Limitations

Weldbond does not bond to some types of plastic, rubber and cast metals. Avoid using on polyethylene, polypropylene, vinyl and PVC. Do not use Weldbond on containers that may hold hot liquids.

How To Make Mosaic Art

For more advice on designing your mosaic project or mounting, cutting, and grouting tile, please see our page of Mosaic Frequently Asked Questions or our Mosaic Information Guide, which lists instructional pages described by topic. We also post new articles about making mosaics at our How to Mosaic Blog.

Weldbond Glue Mosaic Adhesive 420ml (14.2oz)

The 420ml (14.2 oz) bottle of Weldbond Glue Mosaic Adhesive is our preferred size for mosaic work, yet not so small that it has to be refilled too often. It covers covers up to 50 square feet depending on surface roughness and working habits.

Weldbond Adhesive is an extremely versatile glue that can be used to securely bond a wide range of art materials including glass, natural-fiber fabrics and wood. Weldbond is strong, even at low temperatures, but LIQUID Weldbond will ruin if allowed to freeze. DO NOT ORDER DURING HARD FREEZES OR STORE OUTDOORS. Dries clear.

Weldbond Glue Mosaic Adhesive 420ml (14.2oz)

Weldbond is an amazing product:

  • clear drying
  • strong bonding
  • non-toxic.
  • non-flammable
  • no volatile fumes. less than 1% VOCs by weight.
  • water-resistant once fully cured
  • easy clean-up with soap and water
  • can be added to grouts to improve strength and fracture toughness

Product Specifications

Read the manufacturer’s specifications and instructions here.

Weldbond is a white PVA (Poly Vinyl Acetate) adhesive that dries clear. It does not contain formaldehyde, latex, phthalates, aromatic solvents or halogenated solvents (as do many adhesives). It is non-toxic and conforms to ASTM D4236.

Product Coverage

The 420ml (14.2 oz) bottle of Welbond covers about 15 square feet IN THEORY. Actual coverage is about 20% less than that for most users doing detailed work, but messy users or coarsely porous substrates could require significantly more glue. The coverage is greatly affected by how neatly you work, how dry your working conditions are, etc. For example, if the heat is running at the height of winter, then water-based glues can skin over rapidly, and you tend to waste a little bit as it dries on your fingertips and tools.

Use In Mosaic Art

We use Weldbond for presealing wooden surfaces before mosaic work, and we will sometimes dilute it with as much as 1 part water to 2 parts glue. For attaching the tiles in detailed mosaic work, the thicker material provided by straight Weldbond is better.

Why Not Use Other Brands?

There are other brands of white PVA adhesives on the market. The reason that Weldbond is strongly preferred by many mosaic artists is simple:

  • Detailed mosaic work requires that small tiles be positioned carefully.
  • This is often difficult to do this without bumping other small tiles already in place.
  • The thicker the glue, the less the tiles move when bumped.

In other words, Weldbond is “best” because it can take a lot of the frustration out of the work. There are also several other reasons why we think Weldbond might be more durable in adverse conditions.

Limitations

Dry Indoor Use

Weldbond is water-resistant when fully cured, but it does soften when soaked in water over time, so use good judgment. Mosaics in wet locations such as pools and fountains and patios should be made with thinset bonding mortar (a type of sticky concrete) instead of adhesive.

Other Limitations

Weldbond does not bond to some types of plastic, rubber and cast metals. Avoid using on polyethylene, polypropylene, vinyl and PVC. Do not use Weldbond on containers that may hold hot liquids.

How To Make Mosaic Art

For more advice on designing your mosaic project or mounting, cutting, and grouting tile, please see our page of Mosaic Frequently Asked Questions or our Mosaic Information Guide, which lists instructional pages described by topic. We also post new articles about making mosaics at our How to Mosaic Blog.

Weldbond Glue Mosaic Adhesive 3 Liter

weldbond adhesive 3 liter

The 3-Liter (0.79 gallon) jug of Weldbond Mosaic Adhesive is an economical way to refill your small working bottles and save money. Instead of buying small bottles for each person in your class or work group, pour a little bit from the jug into Styrofoam plates and have your artists dip tile in the plates. Use a second plate inverted to cover the glue and maximize working time. Note that the gallon jug and half-gallon jugs have been discontinued by the manufacturer.

Weldbond Adhesive is an extremely versatile glue that can be used to securely bond a wide range of art materials including glass, natural-fiber fabrics and wood. Weldbond is strong, even at low temperatures, but LIQUID Weldbond will ruin if allowed to freeze. DO NOT ORDER DURING HARD FREEZES OR STORE OUTDOORS.

Weldbond Glue Mosaic Adhesive 3 Liter

Weldbond is an amazing product:

  • clear drying
  • strong bonding
  • non-toxic.
  • non-flammable
  • no volatile fumes. less than 1% VOCs by weight.
  • water-resistant once fully cured
  • easy clean-up with soap and water
  • can be added to grouts to improve strength and fracture toughness

Product Specifications

Read the manufacturer’s specifications and instructions here.

Weldbond Glue is a white PVA (Poly Vinyl Acetate) adhesive that dries clear. It does not contain formaldehyde, latex, phthalates, aromatic solvents or halogenated solvents (as do many adhesives). It is non-toxic and conforms to ASTM D4236.

Product Coverage

The 3L (0.79 gallon) jug of Weldbond covers an average area of 200 square feet. Actual coverage is about 20% less than that for most users doing detailed work, but messy users or coarsely porous substrates could require significantly more glue. The coverage is greatly affected by how neatly you work, how dry your working conditions are, etc. For example, if the heat is running at the height of winter, then water-based glues can skin over rapidly, and you tend to waste a little bit as it dries on your fingertips and tools.

Use In Mosaic Art

We use Weldbond Glue for presealing wooden surfaces before mosaic work, and we will sometimes dilute it with as much as 1 part water to 2 parts glue. For attaching the tiles in detailed mosaic work, the thicker material provided by straight Weldbond is better.

Why Not Use Other Brands?

There are other brands of white PVA adhesives on the market. The reason that Weldbond is strongly preferred by many mosaic artists is simple:

  • Detailed mosaic work requires that small tiles be positioned carefully.
  • This is often difficult to do this without bumping other small tiles already in place.
  • The thicker the glue, the less the tiles move when bumped.

In other words, Weldbond is “best” because it can take a lot of the frustration out of the work. There are also several other reasons why we think Weldbond might be more durable in adverse conditions.

Limitations

Dry Indoor Use

Weldbond is water-resistant when fully cured, but it does soften when soaked in water over time, so use good judgment. Mosaics in wet locations such as pools and fountains and patios should be made with thinset mortar (a type of sticky concrete) instead of adhesive.

Other Limitations

Weldbond does not bond to some types of plastic, rubber and cast metals. Avoid using on polyethylene, polypropylene, vinyl and PVC. Do not use Weldbond on containers that may hold hot liquids.

How To Make Mosaic Art

For more advice on designing your mosaic project or mounting, cutting, and grouting tile, please see our page of Mosaic Frequently Asked Questions or our Mosaic Information Guide, which lists instructional pages described by topic. We also post new articles about making mosaics at our How to Mosaic Blog.