• Product

SL-Gyp™

Hybrid Gypsum-Based Self Leveling Underlayment
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Where to Buy
Product overview

SL-Gyp is a premium, hybrid gypsum/cement-based, self-leveling underlayment that can be installed from 1/4" up to 2" thickness without extension. This versatile product is designed for use over distressed gypsum subfloors, lightweight concrete, mud beds, structurally sound wood, and adhesive residue. It is also ideal for use on radiant or in-floor heating systems. SL-Gyp is perfect for certain low-prep applications where shot-blasting and mechanical cleaning of substrates cannot be performed. Choose SL-Gyp for a reliable and efficient solution to your flooring preparation needs, ensuring a smooth and level surface for various types of floor coverings.

Geographic availability
  • United States
Available sizes
50 lb bag

Product information

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Smart Advantages

 
Install from 1/4" to 2" neat
Walkable in 3 to 4 hours
Install floor covering in 2 days

Latest news

May 02 2024
  • Wall & Floor
  • News
XL Brands Announces New Distribution Relationship With Intermountain Wood Flooring
Starting May 2, 2024, XL Brands products, a leading brand of professional flooring ...
Read more
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Next events

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Bostik Academy
Flooring Surface Prep & Adhesives
May 14-15, 2025
Bostik Academy - Temecula
27430 Bostik Ct.
Temecula, CA 92590

Presented by Bostik, discover our cutting-edge solutions in surface preparation, sealants, and ...

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Bostik Academy
Advanced Flooring Prep & Adhesives
May 1, 2025
BPI - Dallas 
4251 Fleetwood Road
Fort Worth, TX 76155

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Bostik Academy
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San Antonio, TX 78271

Presented by Bostik, learn about our innovative surface prep, grout, resilient and hardwood ...

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Bostik Academy
Flooring Surface Prep & Adhesives
April 23-24, 2025
Bostik Academy - Temecula
27430 Bostik Ct.
Temecula, CA 92590

Presented by Bostik, discover our cutting-edge solutions in surface preparation, sealants, and ...

More information

SL-Gyp can also be used for certain low-prep applications where shot-blasting and mechanically cleaning substrates cannot be done.

 

Product Features

  • Ideal for pumping

  • Maintains healing and pour merging properties for up to 20 minutes

  • Exceptional compressive strength – 5,000 psi

  • Suitable for use with in-floor hydronic and electric radiant heating systems

  • Ideal for repairing distressed gypsum and sound plywood substrates

  • Can be used over mud beds and lightweight concrete

  • Ideal for low-prep applications

  • Rapid strength gain

  • Contributes points to LEED® certified projects 

Related market & applications

Wall & Floor

  • Floor Preparation

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