This is the sealer we reach for when floors have contamination risk, movement, or unknown history — not just for a clean look.
Same-day shipping • Freeze protection included • Local pickup in Saint Paul, MN
What It Solves
Isolates contamination from salts, pet stains, oil, and unknown history
Reduces risk of finish failure by creating a stable substrate
Compatible with a wide range of waterborne finishes, including Ceramic Star
Tolerates radiant heat and wood movement
Fast-drying and easy to apply, minimizing downtime
Common Problems This Solves
Premature wear caused by salts, spills, or pet urine
Panelization or sidebonding in wide planks
Finish adhesion issues on problematic or unknown wood
Failures caused by skipping the sealer stage
See the common problem floors we diagnose most often.
Learn how isolation sealers are used when contaminants can’t be removed.
System Context (Why ExoBloc Matters)
ExoBloc isolates the problem.
Paired with Ceramic Star, it forms a complete system rather than a cosmetic fix.
Use over Flex Sealer when moderate flexibility is required for light-use areas
Use under Ceramic Star when maximum wear resistance is needed
👉 Learn more about [Ceramic Star →]
👉 Learn more about [Flex Sealer →]
Application Notes
Single-component, ready-to-use waterborne sealer
Coverage: ~400–500 sq ft per gallon
Dry to touch: ~1–2 hours
Light traffic: ~12–24 hours
Full cure: 7 days (no rugs or maintenance products)
Apply evenly with wet edge; do not overwork
Important Limits
ExoBloc is not a finish. It must be paired with a wear layer such as Ceramic Star for high-traffic durability.
Skipping the sealer stage compromises the system and can lead to premature failure.
👉 Learn more about [why finishes fail →]
Dustin’s Notes
ExoBloc is our go-to when we need to stabilize a floor before coating.
We see contractors get into trouble when they skip this step and try to finish directly over unknown or contaminated wood. Pair it with Ceramic Star or Flex Sealer and the system works predictably.
Technical Specifications
Type: 1-component waterborne polyurethane sealer
Coverage: ~400–500 sq ft per gallon
Dry to Touch: 1–2 hours
Light Traffic: 12–24 hours
Full Cure: 7 days
VOC: Low-VOC, residential & light commercial compliant
Compatibility: Waterborne finishes including Ceramic Star
Recommended Systems
ExoBloc is never a standalone finish. Always pair as a system:
Under Ceramic Star for high-durability, high-traffic floors
Under Flex Sealer for lighter, flexible systems in moderate-use areas
This is where most finish failures happen — skipping the system.
Best For
Floors with unknown history or contamination risk
Wide planks or wood with potential movement
High-traffic residential or light commercial jobs
Contractors needing predictable system performance
Not Recommended When
Lowest upfront cost is the only priority
No topcoat will be applied
Trying to block deep structural contamination alone
Contractor FAQs
Can ExoBloc be used alone?
No. It is a sealer, not a wear layer. Always topcoat with a compatible finish.
How fast can I topcoat after application?
Light traffic in 12–24 hours; full cure in 7 days.
Can I spray this?
It can be sprayed, but we recommend roller or T-bar application for consistent coverage.
👉 Learn more about [Ceramic Star →]
👉 Learn more about [Flex Sealer →]
👉 See the full system: [Problem Floors Don’t Fail →]
👉 Learn more about [why high-traffic floors fail →]
