LEVELROCK® Topping/Capping Floor Underlayments
LEVELROCK® Stronger Than Concrete™ topping and capping floor underlayments provide strength that rivals conventional concrete. Try LEVELROCK® 3500 for an economical topping/capping solution, 4500 NXG® for one-step floor corrections, or PROFLOW™ or QUIK-TOP™ floor underlayment for finished floors with the highest compressive strengths in the industry.
Additional Resources
- Contact us
- Find an applicator
- Sustainability table
- Applications
- Floor underlayment selector
- LEVELROCK Product List
For more information, visit the LEVELROCK/ALCORP Network at alcorpmarketing.com.
Revised & expanded 2011 guidelines

Gypsum Construction Handbook
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