Search  for anything...

Roberts 6399 Firm-Set Transitional Pressure-Sensitive Adhesive - 1 Gal. (3.78 L)

  • Based on 20 reviews
Condition: New
Checking for the best price...

Buy Now, Pay Later


As low as $9 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Friday, Oct 2
Order within 11 hours and 47 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Features

  • For installation of resilient flooring including Luxury Vinyl Tile (LVT), Luxury Vinyl Plank (LVP), and Vinyl Composition Tile (VCT), as well as Carpet Tile
  • Acrylic PSA Moisture Control Firm Set Transitional Pressure-Sensitive Adhesive
  • Concrete, primed Gypsum, cement backerboard and fiber cement underlayment. APA-grade plywood and OSB. Properly prepared existing flooring (excludes self-stick): VCT (single layer) sheet vinyl (single layer non-cushioned, fully adhered). Properly prepared ceramic tile. Terrazzo and radiant-heated floors not exceeding 85F (30 C)
  • Powered by Microban to help fight stain and odor-causing bacteria that can cause product degradation. For interior installation only; ideal for heavy traffic, with great performance under rolling loads
  • Used as a pressure-sensitive adhesive, it has a 60 minute open time and a 12-hour working time; For semi-wet installation, it has a 20 minute open time and a 40 minute working time

Description

ROBERTS 6399 Firm Set Transitional Pressure Sensitive Adhesive is formulated for installation of resilient flooring including Luxury Vinyl Tile (LVT), Luxury Vinyl Plank (LVP), and Vinyl Composite Tile (VCT), as well as Carpet Tile and Broadloom. This is a very aggressive, high-tack transitional adhesive with superior shear strength and high resistance to lateral forces, making it ideal for heavy traffic, with great performance under rolling loads. ROBERTS 6399 installs like a pressure-sensitive adhesive, and firms as it cures to form a permanent bond. Used as a pressure-sensitive adhesive, it has a 60 minute open time and a 12-hour working time; For semi-wet installation, it has a 20 minute open time and a 40 minute working time. Powered by Microban, this antimicrobial product protection helps fight the growth of stain and odor- causing bacteria that can cause product degradation. Easy to clean it dries clear, has high resistance to moisture with low odor and VOC (<1g/L). It is FloorScore and CRI Certified.

Brand: ROBERTS


Specific Uses For Product: Flooring


Material: Acrylic PSA


Item Form: Liquid, Paste


Special Feature: Antimicrobial Protection


Specific Uses For Product: Flooring


Item Form: Liquid, Paste


Other Special Features of the Product: Antimicrobial Protection


Container Type: Pail


Viscosity Level: High


Full Cure Time: 40 minutes


Water Resistance Level: Water Resistant


Compatible Material: Ceramic


Item Package Quantity: 1


Volume: 3.78 liters


Material Type: Acrylic PSA


Color: Clear


Brand Name: ROBERTS


Model: 6399-1


Unit Count: 127.82 Fluid Ounces


UPC: 075378639916


Number of Pieces: 1


Manufacturer: ROBERTS


Included Components: 1 Gal. (3.78 L) of Firm Set Transitional Pressure Sensitive Adhesive


Item Type Name: 6399-1


Part Number: 6399-1


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Oct 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Excellent Adhesion In Challenging Setting
I purchased this formulation to adhere high traffic carpet squares to an area of a hangar floor that was coated with epoxy + non-skid flakes + acrylic. This method increased traction but creates a dimpled surface. I had some doubts before starting the job but this formulation worked perfectly grabbing both the acrylic flooring and the carpet pads, almost instantly locking the pad in place. (Get it right the first time.) Cleanup can be challenging, so work neatly in small areas. I recommend using the specified tooth depth for your applicator -- must have. ... show more
Reviewed in the United States on August 14, 2026 by R. Tucker

  • Great adhesive
Worked great for my sheet vinyl over osb sub-floor. Just trowel it on and follow directions. Clean up was easy with mineral spitits.
Reviewed in the United States on August 20, 2026 by Kevin

  • Use lightly, goes a long way.
Make sure to wear some gloves because this is some sticky stuff. Worked great on my vinyl floor.
Reviewed in the United States on March 21, 2026 by Muckdaddy

  • Very good adhesive
Works very well, use gloves and try not to stick to any tools. Great stuff and very strong when cured.
Reviewed in the United States on June 21, 2026 by Knows Better

  • Great results & a little goes a long way
This adhesive worked incredibly well and the product went a long way. I still have over half the gallon after using it on a 60 sq ft space and a 40 sq ft space.
Reviewed in the United States on September 7, 2026 by Leah S

  • Sticky Stuff!
This stuff is sticky! Be sure you have the tile exactly where you want it as there is no going back and adjusting if you are laying vinyl. Works well and as described.
Reviewed in the United States on March 16, 2026 by Linda E.

  • Great product
Flooring mastic is construction grade and reliable.
Reviewed in the United States on June 3, 2026 by Pat

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...