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Duratop Epoxy Specifications
Click Here to view our Duratop Epoxy Architectural Specifications (PDF)
DURATOP Epoxy Resin Countertops are filled epoxy resin, molded into homogenous, non-porous sheets with no surface coating. All sheets are color and pattern consistent throughout the thickness and will have integral or adhesively seemed components up to maximum practical length.
Typical Architectural specification for DURATOP Epoxy Resin Countertops:
1. Typical work surface: Nominal 1 inch (25 mm) flat, maximum 1 1/4" (32 mm), minimum 3/4" (19 mm). Finished tops to be supplied in maximum practical length up to 96" (2438 mm) finished.
2. Surface finish to be smooth, non-glare matte finish with clean exposed edges in uniform plane, free of defects.
3. Loose Curbs and Splashes: 1 inch (25 mm) or to match thickness of countertops. Typical height 4" (100mm).
4. Color
a. Black (industry standard)
b. Regular Grey
c. White or other color per supplier standard production.
Color sample to be approved by Contracting Officer before work is put in hand.
5. Drip Grooves: Provide under all work surface exposed edges, unless noted otherwise on the Laboratory Furnishing Drawings. Drip grooves shall be ½ inch (13 mm) set back from the front edge where the top overhangs 1 inch (25 mm) and ¼ inch (6 mm) from the edge where the edge overhangs ½ inch (13 mm). The drip groove is to be 1/8" depth
and 1/8" Wide (3.175 mm).
6. Edge profile: All exposed upper edges and corners shall have 1/8" inch (3 mm) bevel or radius as required.
7. Marine edges or no-drip edges: Where indicated on the Laboratory Furnishing Drawings, shall be molded to the countertop material and be 1 inch (25 mm) wide and ¼ inch (6 mm) height with chamfered or radiused transition and be an integral part of the work surface. Marine edges may be factory applied where necessary.
8. Indented areas: Where indicated on the Laboratory Furnishing Drawings, shall be ¼ inch (6 mm) deep with chamfered or radiused sides. Internal and external corners shall have ¼ inch to ½ inch (6 to 13 mm) radius. Marine edges formed around indented areas shall not be less than 1 inch (25 mm) wide.
9. Sink Mounting:
a.
Drop in Sink Cutout - Cutouts shall be profiled to provide support for the sink, and to ensure that the rim of the installed sink is 1/8 inch (3 mm) below the surrounding work surface level or bottom of drain grooves, if present.
The top edge of the cutout shall have 1/8 inch (3 mm) bevel. Ensure that there shall be no gaps between the installed sink rim and work surface.
b. Under counter mount cutout - cutouts shall be made to the countertop material to be 1/4" (6mm) to 1/2" (12mm) larger that the Inside diameter of the sink being installed. The sink is applied to the underside of the countertop with Epoxy Adhesive and secured in place with Sink Supports until adhesive cures and shall be left in place thereafter. Additional epoxy adhesive is applied under the countertop ledge to create a complete and water tite seal.
10. Curbs and Splashes:
a) Height: 4 inches (100 mm), unless noted otherwise on Laboratory Furnishing Drawings.
b) Same material as countertops and bonded or field applied to the surface of the top to form a square 90 degree joint.
Molded integral coved curb epoxy splash are required to reduce joint seams and adhesive attachment.
11. Provide all faucet & utility holes and cutouts as required for built in equipment and mechanical and electrical service fixtures. Verify size and location of opening with actual size of equipment to be used prior to making openings. Form inside corners to a radius of not less than 1/8 inch (3 mm). After drilling, rout and file cutouts to ensure smooth, crack free edges. Seal exposed edges after cutting with a waterproofing material recommended by the manufacturer.
12. Install epoxy resin countertops with supplier's recommneded silicone or Epoxy resin adhesive to the casework.
All square butt joints, splashes and sealing around sinks to be be manufacurer's recommended compatibale and chemical resistant epoxy adhesive.
13. Fume hood work surfaces: Tops shall be 3/4" (19mm) Core work surface and 1" (25mm) inches thick at outer marine edge, indented 1/4 inch (6mm) to provide a raised rim around all exposed edges minimum 1 inch (25mm) wide or as to allow for the fume hood sash. The front top edge of the raised rim and exposed vertical corners of the top shall be rounded or chamfered to a 1/8 inch (3 mm) radius. The juncture between the raised rim and the top surface shall be coved or chamfered to a ¼ inch (6mm) radius. Specifications also allow 1" (25mm) Core work surface and 1 1/4" (32mm) at the marine edge.
THICKNESS - In addition to the wide variety of sheet sizes available, DURATOP monolithic, solid cast epoxy lab work surfaces, with their smooth, non-glare matte finish, are molded in several thickness', with the typical and most popular thickness being 1" (25mm).
When fabricating Duratop laboratory tops and sheet material at the ISO 9001 certified manufacturing facility, all fabricated cuts are made with diamond tipped, water cooled, rotary saws. Sink cutouts, faucet or gas tap fixture holes or other service hole requirements, are cut with CNC diamond tipped routers and drill bits. Typical specification for epoxy countertops in accordance with The Woodworking Institute (W.I.) and its US or Canadian affiliates is 25mm or 1" Thickness. The maximum span for unsupported epoxy shall not exceed 30" (762mm) without intermediate support. The maximum cantilever shall not exceed 12" (305mm) without intermediate support.
The fabricated sheet material comes with a drip groove cut on the front underside of the sheet material at a prescribed depth of 1/8" (3mm), 1/8" (3mm) width and 1/2" (12mm) distance from the front or side edge.
Current manufactured and available thickness' are:
IMPERIAL |
METRIC |
5/8" |
15/16 MM |
|---|---|
3/4" |
19/20 MM |
1" |
25 MM |
1 1/4" |
32 MM |
2 1/2" Adhered |
64 MM |
MINIMUM Quantities apply for production purposes of some thickness'.
EPOXY CURBING 4" (100 mm) typical, also known as applied splash, is provided loose, cut to size for field application, with each sheet order, if required, to match the countertop sizing, or can be field cut from sheet material to meet job requirements. The top front edge and exposed sides are typically eased with a 3/16" radius, 1/8" bevel or chamfer.
An alternative to applied back splash is our Integral Coved Curbing (ICC) as described in the below sections.
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Integral Coved Curb backsplash
INTEGRAL or COVED CURB back splash is also offered in 4" (100 mm), 6" (150 mm) and 8" (200 mm) molded one piece height. Corner units for left and right side applications with Integral Coved Curb can be produced from a mold at a size
of 44 3/4" square (1137 mm) and then cut to size to meet all requirements for Integral Coved curb side splash areas.
Side or return splash however, are typically supplied to the same height as the Integral splash, but cut to size from sheet material, for set-on field applied application with a square joint seam.
Coved Curb worksurfaces should be used when reducing the number of back splash joints is of high priority or architectural specifications call for integral coved curb splash. Full length Integral Coved Backsplash are available in seamless lengths up to 96" [2438mm] and depths up to 38" [965mm]. Other sizes are available or larger sheet depths can be cut to meet specific requirements. Integral coved curb worksurfaces are typically molded 1" [25mm] thick with cove tapered at the top to 3/4" (19 MM) with 3/4" (19 mm) radius at the cove.
By special request, 3/4" (19mm) and 1-1/4" [32mm] thick worksurfaces can be ordered with an Integral curb of 4" [102mm] or 8" (200mm) height. For other special height integral curbs, please contact TLS for availability.
Both Left and Right Side Integral Coved Corner Curbs are produced
at a molded size 
of 44 3/4" finished inches (1,137 MM) square.
This corner coved curb comes with a 44 3/4 " Side Curb (1137 mm)
and a integrally molded back splash curb of 44 3/4" (1137mm).
The depth of 44 3/4" molded section can then be fabricated and reduced
to the required width or depth of the counter, as specified, be it 24", 25", 30, 31",
(609mm, 635mm, 762mm 787mm), etc.
MOLDED Marine Edge / No-Drip Edge Duratop epoxy countertops or laboratory tops can be manufactured with an integral no-drip marine edge on front and/or sides, as required or specified.
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Integral Coved Curb backsplash with Molded Marine or No-Drip edge
Countertop or bench toppings of DURATOP Epoxy are also made with factory molded Integral Coved Curb (ICC) with an integral no-drip marine edge for a seamless molded unit, up to the standard molding capability of depth and length.
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Unapplied Marine Edge (UME) Duratop epoxy flat strips - Duratop epoxy UME strips are used for attachment on the top surface of counter top material to form a marine edge or no-drip edge and offered in +1/4" (7mm) thickness and 1.9 meters (6.27 feet) long. Now available in a "flat" section that attaches only to the surface of Duratop epoxy or Resistop solid phenolic in a width or depth of 1.1" (28mm) or in an "L" shape configuration attached to the surface while covering the front edge as well. Heights of the front edge range from 3/4" to 1.25" (19mm to 32mm).
Unapplied Marine Edge Strips in "L" Shape configuration:
Duratop Epoxy strips can be field applied to 3/4" (19mm), 1" (25mm) or 1.25" (32mm) thick epoxy or solid phenolic resin countertops to form a no-drip marine edge.
The "L" shaped design allows for coverage of the front edge of the
countertop face up to 1.45" (37mm) as well as the top surface in order to provide a uniform epoxy no-drip edge treatment to the work surface material.
UME "L" shaped strips are NOT sold without epoxy sheet materials and only available in Black Epoxy.
Window Sills (Stools) Epoxy - Material shall be monolithic, DURATOP cast epoxy resin product and shall
consist of a polymerized cast resin material formulated to provide a surface with high chemical resistance characteristics. The combination of epoxy resin and asbestos free inert filler materials shall be oven-cured in molds to obtain maximum chemical resistance, and then removed from the molds and oven tempered to achieve maximum physical strength and stability. Surfaces shall have a uniform low-sheen matte surface finish and the materials shall be extremely hard and resistant to scratches and abrasion. Surface is to be flat with square side edges or fabricated and finished if sills protrude past wall depth. Color shall be as required by architect or site conditions, obtained from the manufacturer's standard color range. Colored Epoxy adhesive for securing interior stools to substrate shall be Duratop Epoxy Smooth-On-2 part adhesive cement.
See accessories for other Epoxy related products available.
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Physical Characteristics
DURATOP Epoxy
Physical Property |
ASTM Method |
RESULTS |
FLEXURAL STRENGTH |
ASTM D790 |
13,400 to 13,600 psi |
MODULUS of RUPTURE |
ASTM D790 |
1,000,000 psi |
COMPRESSIVE STRENGTH |
ASTM D695 |
35,000 to 38,100 psi |
TENSILE STRENGTH |
ASTM D638 / D651 |
6,400+ psi |
HARDNESS, ROCKWELL "M" |
ASTM D785 |
Average value of 105 to 113 over 5 samples |
SPECIFIC GRAVITY (Density) |
ASTM D792 |
126.75 LBS/FT3 / 2.03 g/cc |
| to 133 LBS/FT3 / 2.13 g/cc | ||
WATER ABSORPTION |
ASTM D570 |
0.01 to 0.02% |
HEAT DISTORTION |
ASTM D648 |
325 to 331F (161 to 166C) |
FLAMMABILITY or FIRE RESISTANCE |
ASTM D635 |
DID NOT IGNITE |
FALLING BALL IMPACT RESISTANCE |
ERF-23-69 |
NO FRACTURE @ 7 FEET |
TEMPERATURE USE LIMIT |
331F (166C) |
|
| COEFFICIENT OF THERMAL EXPANSION |
ASTM E831-06 |
2.1 to 2.4 x 10-5 power in/in per Degree C |
FUNGAI & BACTERIAL GROWTH RESISTANCE |
ASTM G21 & G22 |
APPROVED |
FOOD AND SPLASH ZONE |
NSF / ANSI standard 51 |
APPROVED |
Duratop epoxy is nonporous which makes it naturally anti-microbial, anti-bacterial, and anti-fungal growth resistant..
Note: ASTM G22-76(1996) Standard Practice for Determining Resistance of Plastics to Bacteria was (Withdrawn in 2002)
Dry Ice and Liquid Nitrogen Warning
Duratop epoxy resin laboratory tops are the materials of choice for the harsh environment of research laboratories, schools, hospital or other wet lab facilities. Epoxy tops or work surface products and the Duratop epoxy sinks however are subject to thermal shock when in contact with dry ice or liquid nitrogen and our products are not warranted against damage from their use. The improper use of dry ice or liquid nitrogen may cause cracking or sink failure.
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Chemical resistance
Duratop, a Monolithic modified cast epoxy resin, is highly resistant to normally used laboratory alkalis, alcohols, acids and solvents. The following solutions were tested on Black Epoxy for a period of 24 hours, with results indicated when tested with listed reagents in accordance with NEMA standard LD-3, test procedure 3.9.5. The chemical was covered with a 25 mm (1") watch glass for a period of 24 hours at a temperature of 23 deg. C (73 deg. 'F).
CHEMICAL RESISTANCE |
RESULT |
Acetic Acid, Glacial |
2 - Excellent |
Acetone |
3 - Good |
Ammonium Hydroxide - 28% |
1 - No Effect |
Amyl Acetate |
1 - No Effect |
Aqua Regia |
1 - No Effect |
Benzene |
2 - Excellent |
Butyl Alcohol |
1 - No Effect |
Calcium Hypochlorite |
1 - No Effect |
Carbon Disulfide |
1 - No Effect |
Chloroform |
1 - No Effect |
Chromic Acid - Saturated |
2 - Excellent |
Ethyl Alcohol - 95% |
1 - No Effect |
Ethyl Acetate |
2 - Excellent |
Formaldehyde - 37% |
1 - No Effect |
Hydrochloric Acid - 37% |
1 - No Effect |
Hydrogen Peroxide - 30% |
1 - No Effect |
Kerosene |
1- No Effect |
Methyl Alcohol |
1 - No Effect |
Nitric Acid - 70% |
2 - Excellent |
Phenol - 85% |
1 - No Effect |
Phosphoric Acid - 85% |
1 - No Effect |
Silver Nitrate - 10% |
1 - No Effect |
Sodium Hydroxide - Flake |
1 - No Effect |
Sodium Hydroxide - 40% |
1 - No Effect |
Sodium Hydroxide NaOH - 60% |
1 - No Effect |
Sulfuric Acid - 77% |
1 - No Effect |
Sulfuric Acid - 96%-98% |
5 - Failure |
Zinc Chloride |
1 - No Effect |
Monochlorobenzene |
1 - No Effect |
Gasoline |
2 - Excellent |
Toluene |
1 - No Effect |
Formic Acid - 90% |
1 - No Effect |
Remel Bactidrop Oxidase Reagent |
1 - No Effect |
Remel Bactidrop Spot Indole Reagent |
1- No Effect |
Evaluation Ratings: RETURN TO TOP
1) No Effect - No detectable change in the material surface.
2) Excellent - Slight detectable change in color or gloss but no change in function or life of the surface
3) Good - Clearly discernable change in color or gloss but no signifcant impairment of surface life or function
4) Fair - Objectionable change in appearance due to surface discoloring or etching, possibly resulting in deterioration of function over an extended period of time.
5) Failure - Pitting, cratering or erosion of work surface material. Obvious deterioration.
BUNSEN BURNER Fire Resistance TEST 
USING ASTM D-635 TEST PROCEDURE, A 3/8" (9.525mm) BUNSEN BURNER, ADJUSTED TO A QUIET FLAME WITH A 1.5" (38MM) INNER CONE, WAS OVERTURNED ON THE DURATOP EPOXY WORK SURFACE FOR A PERIOD OF FIVE (5) MINUTES WITH NO ADVERSE EFFECT, WITHOUT EXHIBITING ANY BLISTERS, CRACKS, NOR ANY BREAKDOWN OF THE WORK SURFACE. DURATOP EPOXY RESIN IS SELF EXTINGUISHING AND SHOWS NO BURN RATE, IN ACCORDANCE WITH ASTM METHOD D-635.
HOT CRUCIBLE TEST
DURATOP EPOXY RESIN WAS TESTED UNDER THE HOT CRUCIBLE TEST PROCEDURE BY PLACING A HIGH FORM PORCELIN CRUCIBLE
(15ML CAPACITY) ONTO THE LAB COUNTERTOP AFTER HEATING OVER A BUNSEN BURNER UNTIL THE CRUCIBLE BOTTOM ATTAINS A DULL RED HEAT. IMMEDAITELY AFTER, THE HOT CRUCIBLE IS TRANSFERRED TO THE WORK SURFACE AND ALLOWED TO COOL TO ROOM TEMPERATURE. THE RESULT WAS THAT THE EPOXY RESIN SURFACE EXHIBITED NO BLISTERS, CRACKS NOR ANY BREAKDOWN OF THE WORK SURFACE.
ALL INFORMATION DESCRIBED HEREIN IS BASED UPON MANUFACTURERS' TESTS AND DATA BELIEVED TO BE ACCURATE AND CURRENT. THE INFORMATION PROVIDED IS TYPICAL AVERAGE VALUES AND CHEMICAL RESULTS MAY BE COLOR DEPENDENT.
NO ONE MATERIAL IS SUITABLE FOR ALL THE CONDITIONS POSSIBLE. THEREFORE THE PROPERTIES OF ANY MATERIAL SHOULD BE CHECKED FOR SUITABILITY UNDER THE SPECIFIC CONDITIONS OF EACH INSTALLATION. THE FINAL DETERMINATION FOR SUITABILITY OF DURATOP EPOXY RESIN MATERIALS DESCRIBED ABOVE IS THE SOLE RESPONSIBILITY OF THE USER.
Click Here to view our Duratop Epoxy Architectural Specifications (PDF)