is this the best choice for outside mosaic in a temperate climate (40 deg-80 deg F)

I would suggest an adhesive that is not water based as well. Silicone adhesives are waterproof, and would withstand the outdoor use better. Use a grout sealer that is intended to prevent absorption and permanent staining to keep your mosaics looking fantastic.

For sculpture project, will this bond large sheets of cardboard together?

Yes, you can bond large sheets of cardboard together.

Is this food safe? I would like to use it to seal terracotta pots that we will be growing herbs in.

I would say yes.. it is basically a strong water souluable elmers type glue. I would use it on terra cotta pots.

Can i mix this with premixed grout to make it stick better to a wall -a vertical surface? If so, should i mix it or just put a layer on the wall first

You should not mix the glue with grout. If you are putting heavy tile on a wall you would use Thinset which is available in different strengths for walls.

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Weldbond Glue - Bonds Most Anything! 3L /101 oz Non-Toxic Adhesive Glue For Wood Tile Glass Craft Foam Fabric Stone Cement & Concrete & Any Other Porous Surfaces. No Fume Non-Flammable PVA Glue Gallon

Product ID: 258219915

Details

Brand
Weldbond
Item form
Liquid
Special features
Dries Clear
Specific uses for product
Wood

🌿Non-toxic & eco-friendly

💧Water resistant & washable

🛠️Bonds 100+ materials

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$295.40

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Description

🧩 Weldbond: The Ultimate Bond for Every Bold Creation

CRAFT LIKE A PRO - Ideal for mosaics, carpentry, school projects, and delicate crafts—flexible yet permanent hold that won’t crack or peel.
CLEAN CONVENIENT - No run, no drip formula cleans up easily with water—keeping your workspace neat and your projects flawless.
FAST FLAWLESS FINISH - Dries crystal clear in 20 minutes with no clamping, sanding or painting hassle—perfect for pros and creatives alike.
ONE GLUE TO RULE THEM ALL - Unbelievable strength bonds wood, tile, glass, fabric & more—ditch the clutter of multiple adhesives.
SAFE FOR YOU THE PLANET - Non-toxic, odorless, fume-free, and eco-certified—glue with confidence in any home, office, or workshop.

Weldbond Glue is a versatile, non-toxic adhesive that bonds over 100 porous surfaces including wood, tile, glass, fabric, and concrete. It dries clear, is water resistant, weatherproof, and eco-certified, making it the go-to glue for professional-grade crafts, carpentry, and household projects. Fast setting in 20 minutes with no fumes or flammability, Weldbond combines strength, safety, and convenience in a single 3L gallon.

Specifications

ASIN	B00RM70LKI
Best Sellers Rank	#33,703 in Office Products ( See Top 100 in Office Products ) #327 in Art Glues
Brand Name	Weldbond
Color	Cream
Compatible Material	Wood, Glass, Craft, Linoleum, Carpet, Concrete, Cement, Brick Stone, Ceramic, Mosaic, Porcelain, Miniature, Jewelry, Stone, Fabric, Sculpture, Mural, Foam, Styrofoam, Cork, Pottery, Slate, Tile, Clay, Metal, Steel, and More
Container Type	Bottle
Customer Reviews	4.5 4.5 out of 5 stars (442)
Full Cure Time	30 Minutes
Global Trade Identification Number	00058951500308
Included Components	Weldbond Glue 3L / 101 oz - Bonds Most Anything! Non-toxic Adhesive Glue For Wood Glass Tile Craft Fabric Rock Cement & Concrete And Any Other Porous Surfaces. No Fume, & Water Clean Up. Glue Gallon
Item Form	Liquid
Item Package Quantity	1
Item Type Name	Glue
Item Weight	2.87 Kilograms
Manufacturer	Frank T Ross and Sons
Material Type	Wood, Glass, Craft, Linoleum, Carpet, Concrete, Cement, Brick Stone, Ceramic, Mosaic, Porcelain, Miniature, Jewelry, Stone, Fabric, Sculpture, Mural, Foam, Styrofoam, Cork, Pottery, Slate, Tile, Clay, Metal, Steel, and More
Model	8-50030
Number of Pieces	1
Other Special Features of the Product	Dries Clear, Non Toxic, Strong, Washable, Water Resistant
Part Number	3L
Specific Uses For Product	Wood
UPC	058951500308
Unit Count	1 Count
Viscosity Level	High
Volume	101 Fluid Ounces
Water Resistance Level	Water Resistant

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