Adhesives and Sealants — FAQ
What's the difference between construction adhesive and wood glue?
Construction adhesive bonds multiple materials and fills gaps, while wood glue penetrates wood fibers for furniture joints. Use construction adhesive for subfloors, paneling, and mixed-material projects where gap-filling and multi-surface bonding are required.
Can construction adhesive be used outdoors?
Yes, but only polyurethane-based formulas like Loctite PL Premium are truly waterproof and UV-resistant. Standard adhesives break down with moisture and temperature swings. Always check the product label for exterior rating and weatherproof claims.
How long should I wait before removing braces?
Most adhesives reach handling strength in 24 hours, but full cure takes 7 days. Instant-grab formulas like Power Grab Express may allow brace removal in 30 minutes for light loads. For structural applications, maintain bracing for the full 24-hour period.
Do I need a caulk gun for all construction adhesives?
No. Cartridge types require a caulk gun, but squeeze tubes like Gorilla's 7 oz version offer tool-free application for small repairs. Cartridges provide better value per ounce, while tubes excel at precision work and portability.
Will construction adhesive stick to painted surfaces?
Polyurethane adhesives bond well to most painted surfaces, but glossy or oil-based paints may need light sanding for optimal adhesion. Always clean surfaces first and test on scrap. For best results, remove loose or flaking paint before application.
Is stronger always better when choosing construction adhesive?
Not necessarily. Excessive strength can make future demolition difficult and may damage materials when removed. Match the adhesive strength to your project's structural requirements. For non-structural trim work, a standard duty adhesive is often sufficient.