Flooring — FAQ
Can I apply grout sealer over existing sealed grout?
Yes, but only if you're using the same type of sealer. Clean thoroughly first, then test absorption. If water beads up, strip the old sealer with a specialized remover before reapplication for best adhesion.
How long does grout sealer last before reapplication?
Penetrating sealers last 3-5 years in low-traffic areas, 1-3 years in showers and kitchens. Surface sealers require reapplication every 6-12 months. Perform an annual water test—if water absorbs instead of beading, it's time to reseal.
What's the difference between sanded and unsanded grout sealer?
Most penetrating sealers work on both types. The key difference is coverage—sanded grout's larger pores absorb more sealer, reducing coverage by 30-50%. Always check the product specifications for compatibility with your grout type.
Should I seal grout before or after grouting?
Seal only after grout has fully cured, typically 48-72 hours after installation. Premature sealing traps moisture, causing discoloration and weakening. For existing grout, clean thoroughly and let dry 24 hours before sealing.
Is grout sealer safe for food preparation areas?
VOC-free and low-odor formulas like Seal It Green and Meuvcol are food-safe once fully cured. Always verify the product label specifies food-contact safety. Allow 72 hours of curing before using countertops for food prep.
Why does my sealed grout still get dirty?
Sealers resist stains but don't prevent surface dirt. Grout can still accumulate soap scum and grime. Use pH-neutral cleaners—harsh chemicals degrade sealer. Reseal high-traffic areas annually to maintain protection.
