Chem-Thane 509 V.2017

Available Sizes
  • 1.0 Gallon Unit
  • 4 Gallon Unit (special order with extra lead time).
  • Superior UV resistance
  • Easy 3:1 mix ratio
  • Excellent gloss retention
  • Highly abrasion resistant
  • Remains flexible
  • High coverage rate
  • Chemically resistant to many non-solvents


CHEM-THANE 509 is a 2-component, 55% solids water-clear, polyester aliphatic polyurethane. This high-performance CRU produces a high gloss finish and offers high light reflectivity, is non-chalking, and has superior UV resistance. CHEM-THANE 509 provides superior protection from many chemicals and has excellent abrasion resistance.



CHEM-THANE 509 is an ideal protective finish coating for applications to ROCK-TRED floor or wall systems. It is an excellent high performance finish coat where color stability is important and where some odor can be tolerated.


Typical Coverage

CHEM-THANE 509 should be applied at an approximate coverage rate of 300 - 425 sq. ft. / gal.



CHEM-THANE 509 is manufactured and normally stocked in 1.0 gallon CLEAR, GLOSS units only. Four Gallon units and ROCK-TRED Standard Solid Colors are available with additional lead time and in minimum order quantities.


Physical Properties

Volume mix ratio 3 to 1 (Resin to Hardener)
Viscosity (mixed) 249 CPS Typical
Solids Content (%]) 55% (ASTM D-2697)
Hardness 55-65 (Shore D). 100 (Shore A)
VOC Clear version is compliant to all US Regulations
except certain areas of California.
Application Temps. 50° – 120°F
Gel time 120 minutes @ 75°F
Dry to Touch (recoat with compatible products) 8 hours (min.) @ 75°F
Through Cure 18 hours @ 75°F
Open for light traffic/use 24+ hours @ 75°F
Shelf Life 1 Year in unopened containers

Limitations & For Best Results

  • Do not thin this product.
  • Do not apply when Humidity exceeds 85%.
  • Do not allow to puddle during application or during cure. Allow each coat to dry completely prior to re-coat.
  • Allow previous coatings of other polymer products to dry completely prior to application of CHEM-THANE 509.
  • When re-coating, always apply the next coat between 8 - 24 hours of completing the previous coat.
  • Allow for proper ventilation with indirect air flow and keep away from ignition sources. Poor ventilation can lead to solvent entrapment which can inhibit product curing and cause yellowing.
  • Do not apply this product heavier / thicker than the recommended spread rate / mil thickness. Product should be applied in thin coats not exceeding 5 mils WFT.
  • Do not apply directly to bare concrete.
  • This product has broad spectrum chemical resistance, but like all CRU, is not highly resistant to solvents.

Product Application

Apply using brush and ¼” mohair roller or lamb’s wool applicator. ROCK-TRED product test data is based on environmental temperatures of 75° F. Viscosity and working time are always affected by temperatures above or below that mark. When applying product – always consider the ambient, surface, and product temperature at the time and place of installation.


Color and Textures

CHEM-THANE 509 is stocked in 1.0 gallon CLEAR units of GLOSS only. Light Gray C-03 and White C-18 require 7 day lead times, but do not require minimum order quantities. All 4 gallon kits and all other ROCK-TRED Standard Colors require 7 day lead time AND a 30 gallon minimum order.

Most ROCK-TRED products are available in a wide range of textures using an appropriate broadcast aggregate, but aggregate larger than 240 mesh may not remain in CHEMTHANE 509 under traffic. Approximately 1.42 pounds of ROCK-TRED’s 240 grit Aluminum Oxide powder may be added into 1 gallon of CHEM-THANE 509 at the time of mixing to increase abrasion resistance and the cured coating’s coefficient of friction. Adding AO powder will leave a superfine grain texture in the finish and will reduce light reflectivity. Repeated stirring the product during application to avoid the AO settling and then careful and even application is needed to avoid roller marks when AO powder has been added.


Chemical Resistance

Always refer to ROCK-TRED’s chemical resistance chart for specific information on each product / system or contact ROCK-TRED directly.


Product Storage

DO NOT allow ROCK-TRED products to freeze. All ROCK-TRED products should be properly stored above the floor on pallets or shelves, and in an area that has a constant minimum temperature of 50°F.


Surface Preparation

Always apply ROCK-TRED products to a clean / sound substrate that is free of laitance, grease, oils, debris, and curing compounds. Concrete substrates should be cured for a minimum of 28 days prior to application of product [except as otherwise noted on the individual Product Data Sheet]. Concrete substrates should be treated with the Rock-Block System when moisture testing per ASTM F2170 shows results over 80% RH. Whenever possible, remove existing coatings and/or flooring systems completely; if complete removal is not possible always perform tests to determine adhesion and compatibility to the existing flooring. Mechanical preparation by means of a diamond grinding machine to a minimum CSP-2 profile followed by application of an appropriate ROCK-TRED primer or base system is the best and recommended installation method for CHEM-THANE 509 applications. If the substrate is not properly prepared and the appropriate profile is not achieved, failure of the product to adhere to the substrate may occur.


Clean Up

Application tools and equipment can be cleaned with soap and water immediately after use or with solvent once the product has begun to cure.



Product containers will contain product residue and must be disposed of properly. Label warnings must be observed at all times. All containers must be disposed in accordance with federal, state, and local regulations.


Important Notice

Always read and acquaint yourself with ROCK-TRED’s Product Data Sheet, SDS [safety data sheet], and product labels for each individual product prior to mixing and prior to use. For further assistance, product questions, additional information and/or unexpected or unusual installation conditions – contact your Area Sales Representative or ROCK-TRED directly for recommendations. Kit components are pre-measured for optimal performance. Catalyzation errors due to incorrect mixing in the field voids product warranty.