ROBERTS 7250 Cork Underpayment Owner’s Manual
- August 29, 2024
- ROBERTS
Table of Contents
72507250
CORK UNDERLAYMENT
PROFESSIONAL-GRADE ADHESIVE Powered by Microband for superior
mold and mildew protection.
DESCRIPTION
ROBERTS® 7250 Cork Underlayment Adhesive is recommended for the installation
of acoustical cork underlayment rolls or sheets. It provides a strong initial
grab and good tack.
Features and Benefits
- Solvent free, low-VOC formula with strong initial grab and good tack
- Acoustical cork underlayment rolls or sheets
- Moisture control up to 5 lbs. MVER and 80% RH
- Ex tended working time for optimal positioning
- Coverage up to 190 ft2/gal
- Commercial and residential use
- Powered by Microban® for superior mold and mildew protection
Approved Flooring Types
Acoustical cork underlayment (rolls)
Acoustical cork underlayment (sheets)
Approved Substrates
Concrete
APA-rated plywood
For floorings and backings not listed, contact Technical Services at
706-277-5294 (U.S.A)
**Recommended Trowel and Coverage Rate***
1/8″ x 1/8″ x 1/16″ (3 mm x 3 mm x 1.5 mm) Flat-Top V Notch
Flooring (porous substrate): Cork Underlayment ≤ 3/8″
Coverage: 160-180 f t 2 /per gallon (14.8-16.7 m2/per 3.78 L)
1/16″ x 1/16″ x 1/16″ (1.5 mm x 1.5 mm x 1.5 mm) SQ Notch
Flooring (porous substrate): Cork Underlayment ≤ 3/8″ Coverage: 170-190 f t 2
/per gallon (15.8-17.6 m2/per 3.78 L)
- NOTE: The trowel notches referenced are those typically recommended for the type of flooring being installed, and are referenced as a guide. Coverage rates will vary depending on trowel type, substrate and installation conditions. Consult flooring manufacturer for their specific trowel recommendations.
TECHNICAL DATA
| Product Type: | Latex |
|---|---|
| Color: | Tan |
| Odor: | Very mild |
| Open Time: Working Time: | Up to 60 minutes |
Up to 90 minutes
Setup time will vary slightly with temperature and porosity of substrate
Curing Time:| 8-10 hours
Traffic:| Residential: 24 hours Commercial: 24 hours Rolling Loads: N/A
MVER:| 5 lbs or less (ASTM F1869) / 80% RH or less (ASTM F2170)
pH:| Must not exceed 10.0
Shelf Life:| 2 years from date of manufacture when stored in the original
unopened container in a controlled environment. Does not require thinning
Storage:| Protect from freezing
VOC:| <1 g/L
INSTRUCTIONS
Limitations
- Ensure adequate ventilation during flooring installation
- Not recommended for the installation of cork flooring when it is to be the final finished flooring surface
Preparation
Subfloors must be structurally sound, dry, smooth, flat (≤ 3/16″ within 10′),
level and free of excess moisture/alkali and all substances (oil, wax, grease,
paint, oil based sealers, adhesive residue, etc.) that may inhibit the bond of
the adhesive or the per formance of the flooring or its installation.
All substrate cracks, chips, holes, joints, high spots and irregularities must
be adequately repaired. Expansion or other moving joints must not be filled or
covered with flooring. Patching compounds must be suitable for the use
application, cement based and polymer-modified and applied according to the
manufacturer’s instructions.
Installation
Materials and area temperature must be bet ween 65°F-95°F with a maximum
relative humidit y (RH) of 65% for 72 hours before and during installation as
well as for 72 hours af toward. Large temperature or humidit y increases or
decreases can affect the flooring and per formance of the installation. L if t
a corner periodically to ensure 100% coverage of adhesive to the flooring
backing and the substrate to ensure a void-free bond.
Spread adhesive uniformly. Adhesive ridges should be of sufficient height to
achieve full coverage of the substrate and the back of the cork underlayment.
Place underlayment into the adhesive once the adhesive has developed its
initial tack. The amount of time in which you have to place the flooring will
vary with temperature and humidity.
Clean-up
Fresh adhesive – warm soapy water. Dried adhesive – use mineral spirits
sparingly with a clean, white cot ton cloth. DO NOT POUR DIRECTLY ONTO
FLOORING
AVAILABILITY
USA
| 4 G Plastic Pail | 7250-4 | 75378725046 |
|---|---|---|
| 1 G Plastic Pail | 7250-1 | 75378725015 |
https://www.qep.com/qr/?go=Roberts_7250-Cork-Underlayment
WARRANTY
Rober ts Consolidated Inc. offers a limited-product warrant y on this product when installed in accordance with the printed specifications. Visit rober tsconsolidated.com or call (866) 4 35-8665 for full warrant y details.
TECHNICAL SERVICES
For technical assistance or installation questions not covered in this document, please contact our Technical Services Department at 706-277-5294 U.S.A.
ROBERTS® and the e® logo are registered trademarks of Roberts Consolidated
Industries, Inc. © 0.E.P° is a registered trademark of 0.E.P. Co., Inc.
LEED® and its related logo, is a trademark owned by the U.S. Green Building
Council® © Microban® is a registered trademark of Microban Products Company.
Roberts Consolidated Industries, Inc.
300 Cross Plains Blvd, Dalton, GA 30721
Customer Service: (866) 4 35-8665
Technical Suppor t : 706-277-5294
robertsconsolidated.com