Adhesives and Sealants — FAQ
What's the difference between polyurethane and latex-based construction adhesives?
Polyurethane adhesives offer superior strength (3000+ PSI), waterproof bonding, and temperature resistance from 0-120°F. Latex-based adhesives are cheaper, water-cleanable, and adequate for interior wood-to-wood but fail on non-porous materials and lack structural integrity for load-bearing applications.
How long does construction adhesive take to cure?
Initial set ranges from 0 seconds (instant grab) to 30 minutes. Handling strength typically develops within 2-24 hours depending on formula, temperature, and humidity. Full cure and maximum strength require 24 hours for polyurethanes and up to 7 days for some hybrid polymers.
Can construction adhesive replace mechanical fasteners?
Premium polyurethane adhesives can replace nails and screws in many applications when combined with temporary bracing. For subfloors, adhesives plus screws meet building codes. Always follow local codes and manufacturer specs—never rely solely on adhesive for structural connections subject to tension or shear loads.
Is construction adhesive waterproof?
Polyurethane and hybrid polymer adhesives are 100% waterproof and suitable for exterior use, submersion, and wet environments. Latex-based adhesives are water-resistant but will soften and fail under prolonged moisture exposure. Check product labels for 'waterproof' versus 'water-resistant' claims.
What surfaces can construction adhesive bond?
Polyurethane adhesives bond virtually everything: wood, concrete, stone, metal, glass, ceramics, brick, and most plastics. Latex adhesives work best on porous materials like wood and drywall. Always clean surfaces of dust, oil, and loose particles, and test adhesion on questionable substrates before full application.
How do I remove excess construction adhesive?
Remove wet adhesive immediately with mineral spirits for polyurethane or water for latex formulas. Once cured, mechanical removal via scraping, sanding, or cutting is necessary. Use a sharp utility knife for precise cleanup on finished surfaces—chemical removers rarely work on fully cured construction adhesives.