weldbond adhesive 420ml

Weldbond Glue Mosaic Adhesive 420ml (14.2oz)


420ml (14.2oz) water-based PVA adhesive in plastic dispensing bottle.

In stock

SKU: weldbond-mosaic-adhesive-420ml Categories: ,

Product Description

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

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 50 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.


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.


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