Adhesives and Sealants — FAQ
What's the difference between construction adhesive and wood glue?
Construction adhesives bond multiple materials including metal, concrete, and plastic. Wood glue only works on porous wood surfaces. Construction adhesives fill gaps and resist water; wood glue requires tight joints and fails when wet.
Can I use construction adhesive instead of screws?
Yes, many construction adhesives exceed screw strength when properly applied. For code-compliant subfloors, combine both. For trim and molding, adhesive alone often provides permanent bonds stronger than nails.
How long does construction adhesive take to cure?
Tack time is 30 minutes to 2 hours. Light handling strength develops in 12-24 hours. Full cure and maximum strength requires 7 days. Temperature and humidity affect cure speed—cold weather slows curing significantly.
Do I need to use a caulk gun for all construction adhesives?
No. Cartridges require caulk guns, but squeeze tubes offer tool-free application. Squeeze tubes cost more per ounce but provide precision for small projects. Cartridges are economical for large-scale applications.
Is construction adhesive waterproof?
Polyurethane and hybrid polymer formulas are 100% waterproof. Latex-based adhesives are water-resistant but fail with prolonged moisture. Always check labels—exterior-rated adhesives are mandatory for wet environments.
Can construction adhesive fill gaps?
Quality adhesives fill gaps up to 3/8 inch. Polyurethane formulas expand slightly, filling irregularities. For larger gaps, use shims plus adhesive. Avoid using adhesive as filler in gaps exceeding manufacturer specs—bond strength drops dramatically.