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EpoHeat requires 90 minutes to cure in an oven @ 55°C (131°F.) This epoxy system is beneficial if preparing a sample that requires good edge retention and minimal shrinkage. EpoHeat can stand up to 4 hours before curing |
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Hardness measures the resistances of a material withstanding indentation. The Shore D hardness scale provides a measure of the resistance to indentation of polymer materials |
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HDT (Heat Deflection Temperature) is a measure of distortion resistance under load and elevated temperature. HDT data shows EpoHeat will remain harder than our other epoxy systems during grinding/polishing |
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Viscosity measures the internal resistance of friction when fluids move against themselves. Having a low viscosity allows the resin to flow into every nook to ensure that there are no gaps between the mounting media and the specimen. A high viscosity may allow air bubbles and gaps to be more persistent |
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(Values based on largest gap present in sample)
EpoHeat presents a 4.5 micron shrinkage gap, in an "¼1 mounting cup. Low shrinkage allows the mounting media to protect the edge of the sample. If gaps are present, trapped abrasives may scratch your sample. If the edge of the sample is not backed up by your chosen mounting media, edge rounding may occur
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| Epoxy Shrinkage. Left) EpoThin® 50x. Middle) EpoHeat® 50x. Right) EpoMet® 50x |
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| Applications |
EpoHeat is best used when preparing samples that require
Large mounts
Excellent edge-retention
Need for clarity
Mount to glass for making thin sections
Quick mounting
Better abrasion-resistance match for difficult to abrade specimens
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Ratios
4 parts resin by weight to 1 part hardener by weight |
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Mounting cup size
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Resin
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Hardener
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"1
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12 grams
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3 grams
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"¼1
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16 grams
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4 grams
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"½1
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20 grams
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5 grams
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"2
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32 grams
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8 grams
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| Guide to choosing the appropriate support clip for your specimen |
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Buehler SamplKlips®, Specimen Support Clips and UniClips® are intended for use in supporting specimens during mounting for metallographic preparation. The choice of clip will depend on the mounting method and specimen geometry. All of these products are compatible with all Buehler castable media types (epoxy and acrylic). Specimen support clips are not recommended for compression mounting. The SamplKlip® and SamplKlip® I are compatible with compression mounting, however the stainless steel SamplKlip® may deform during the mounting process. The UniClip® is perhaps best suited to compression-mounting, though for this application the UniClip® must be oriented with the “legs” upward to prevent collapse during mounting The weight of the clips should be considered where light specimens may have the tendency to float in castable media. If this is a concern, the stainless steel SamplKlip® is the best choice. For metallic specimens that are to be etched after preparation, one of the polymer clips (SamplKlip® I, Specimen Support Clip, or UniClip®) is best to prevent interference with etching due to a stainless steel clip in contact with the specimen Specimen thickness will influence choice of clip type as follows
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| Clip Type |
Approximate Compatible Specimen Thickness |
| Spec Support Clip, UniClip |
0.0035” to 0.090” (0.9 mm to 2.3 mm) |
| SamplKlip®, SamplKlip® I (large and small) |
up to 0.200” (5 mm) |
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| Use the product dimensions listed below to ensure compatibility of these products with specimens |
| Approximate Product Dimensions |
| Product |
Catalog Number
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Height (in)
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Width (in)
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Length (in)
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Weight (in)
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| SamplKlip® |
20-4000-100
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0.250
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0.550
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0.350
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0.575
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| SamplKlip® I |
20-4100-100
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0.250
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0.475
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0.300
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0.230
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| SamplKlip® I |
20-4100-100s
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0.250
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0.425
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0.250
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0.110
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| Spec Support Clip |
20-4001-000
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0.250
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0.290
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0.375
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0.145
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| UniClip® |
20-5100-100
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0.400
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0.360
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0.500
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0.290
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| All dimensions and weights are approximate and intended only to provide a relative comparison of these products. The width values are measurements of the clip at its widest point without a specimen. UniClip® height given above includes legs (height ~ 0.235” without) |
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| Accessories |
| Release Agent – for coating the mounting cup for easy release |
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Part Number
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Qty
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Release Agent
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20-8185-002
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2 oz
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Release Agent
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20-8185-008
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½ pint
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Release Agent
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20-8185-016
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1 pint
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Release Agent
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20-8185-032
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1 quart
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SamplKlip® - for supporting sample orientation in the mounting cup
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Part Number
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Qty
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SamplKlip®-Stainless Steel
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20-4000-100
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100
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SamplKlip® 1 - for supporting sample orientation in the mounting cup
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Part Number
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Qty
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SamplKlip® I-Plastic
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20-4100-100
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100
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SamplKlip® I-Plastic (small O.D.)
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20-4100-100S
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100
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Specimen Support Clips - for supporting sample orientation in the mounting cup
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Part Number
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Qty
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Specimen Support Clips-Plastic
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20-4001-000
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100
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SamplKups® - reusable mounting cups
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Part Number
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Size
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Qty
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SamplKups®
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20-8180
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"¼1
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12
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20-9177
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25mm
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12
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20-9178
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"1
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12
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20-9179
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30mm
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12
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20-9181
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"½1
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12
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20-9182
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40mm
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12
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20-9183
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50mm
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12
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20-9184
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"2
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12
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Reusable EPDM Mounting Cups
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Part Number
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Size
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Qty
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EPDM Mounting Cups
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20-8181
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"1
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5
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20-8182
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"¼1
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5
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20-8183
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"½1
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5
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20-8184
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"2
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5
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20-6185
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2.5” x 1.4” x 1.8”
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1
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20-6186
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6” x 4” x 2”
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1
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20-6187
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6” x 3” x 1”
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1
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Flat Edge Filler (if necessary) – to increase the hardness of the castable mount media
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Part Number
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Qty
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Flat Edge Filler
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20-8196
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1 lb
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| FAQ |
Can you use with disposable plastic castable mounting cups
No, they will melt |
Can you use with MetKleer® or Phenolic/Plastic Ring forms
With care and the use of a vacuum grease to form a tight seal to the form and the base or glass slide. Remember this product has extremely low viscosity and may leak out. The Metkleer Adhesive Base or MetGrip liners are not suitable for use in an oven |
Can you use with Conductive Filler
Due to the low viscosity, the filler will sink to the bottom so the entire mount will NOT be conductive. It is best to sputter coat this sample if it needs to be conductive |
Why is my epoxy crystallized, gelled or rock hard in the container
Due to the chemical purity of this product, it may crystallize. To relieve this condition, the entire container should be placed in an oven up to 50 °C (122 °F) for approximately two hours. If product is still crystallized after two hours, extend the time in the oven until the crystallization is relieved |
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| MSDS |
| EpoHeat Hardener 20-8122-016 |
| EpoHeat Resin 20-8120-032 |
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| Tips, Tricks and Techniques |
Clean up any spills or drips with paper towel and ethanol
Wear gloves
Prepare sample under a hood, if possible
Use Cast N Vac or Cast N Vac 1000
3 cup mix method (see video for demonstration)
Can mix large mount in one batch, like a 6" x 4" x 2" Reusable EPDM Mounting Cup
Better to use the EPDM molds, reduces leakage
Use release agent to coat mold for easy removal of sample |
