WoodCast 30 – 1.6kg


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WoodCast 30 – 1.6kg is an optically clear commercial grade casting and encapsulation two-part epoxy resin system.

WoodCast 30 has excellent high-gloss wood coating/casting features which are ideal for:

  • River table casting
  • Wood laminating
  • and epoxy artwork.

Woodcast 30 is also an excellent floor coating system. Its high-performance highlights good mechanical and excellent self-levelling properties.

This product is not moisture sensitive and can be utilized in humid environments.

Also available in an 8kg pack size here.

WoodCast 30 Part A - 1kg


Availability: 119 in stock

WoodCast 30 Part B - 600g


Availability: 110 in stock

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Safe & Secure Shipping to all South African addresses.

When Do I Get It?

Shipping time is 2 - 5 business days. Excludes weekends & Public Holidays.

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In-Store Sales

Shop in-store at AMT Composites in Johannesburg, Cape Town & Durban.

  • Shipping may only be to a physical address within the borders of South Africa. No P.O Box’s allowed.
  • Shipping to outlying or remote areas like farms and game reserves may attract an additional fee.
  • The delivery time to city areas is usually between 2 and 5 working days*. This excludes weekends and public holidays. *Reckoned from time of dispatch to time of arrival to client. This is an estimate and not guaranteed.
Courier Service
We use 4 courier companies for delivery. With sophisticated track and trace equipment, you can pinpoint exactly where your parcel is, from the moment it is dispatched by us, until it’s safely handed over to you the recipient. Your parcel is well packaged and wrapped before delivery. All parcels can be insured for the journey to your door.

We charge a weight based shipping fee.

  1. Free Shipping for all orders R2,500 or more!
  2. Standard Shipping 0 to 5kg – R99.00
  3. Shipping Shipping 5.1 to 10kg – R118.00
  4. Standard Shipping 10.1 to 15kg – R140.00
  5. Standard Shipping 15.1 to 20kg – R180.00
  6. Standard Shipping 20.1 to 40kg – R220.00
  7. Standard Shipping 40.1 to 80kg – R250.00
  8. Standard Shipping 80.1kg 100 – R400.00
  9. Standard Shipping 100.1kg to 130kg – R517.50
  10. Standard Shipping 130.1kg to 160kg – R667.00
  11. Standard Shipping 160.1kg to 190kg – R747.50
  12. Standard Shipping 190.1kg to 230kg – R874.00

Shipping rates are provided at checkout.

Our delivery service only runs from Monday to Friday. Saturday morning deliveries can be done by special arrangement only and at an additional charge. Please contact us to arrange. We reserve the right to re-quote the delivery fee should this become too expensive.

At AMT Composites we want you to be 100% happy with any purchase you make from us.

Changing your Mind / Right to Cancel

If you change your mind for any reason, goods can be returned to us for a full refund if notified to us within 7 days of delivery; you have a further 7 days to dispatch the goods for their return to us. Goods returned after 7 days will incur a 15% restocking fee of the items being returned.

NO GOODS manufactured or sold by Advanced Materials Technology Pty Ltd will be accepted for a credit if returned after one (1) calendar month of original invoice date.

To return goods that are not faulty (i.e. because you changed your mind) they must be unused and, in the condition, they were delivered to you in. This does mean that, unless found faulty, we are unable to accept returns for:

  • Opened containers of resin, hardener, silicone or chemical release agent, unless found to be faulty or defective.
  • Unrolled and improperly re-rolled fabrics, unless found to be faulty or defective.
  • Any product that you have subsequently cut, shaped, broken or modified, unless found to be faulty or defective.

Refund of Delivery Charges (Cancelled Orders)

If you return an order in its entirety, then your outbound delivery charges will also be refunded (for orders within the South Africa’s Local Area’s.

If you return only part of an order, then the outbound delivery charge refund will be calculated based on the total postage cost of the original order (using standard service) minus the cost to send the items you are keeping (using standard service). Due to the way that shipping costs are incremented, this will often result in no delivery charge refund being due.

Faulty or Defective Goods

Any goods found to be faulty or defective and notified to us within 7 days of delivery can be returned to us for a full refund.

Refund of Delivery Charges (Faulty/Defective Goods)

If you are returning faulty or defective goods, then your outbound and return delivery costs will be refunded in full (for orders from within South Africa’s Local Area’s.)

In the event that you are returning faulty or defective goods which were ordered as part of a larger order then the outbound delivery charge refund will be calculated based on the total postage cost of the original order (using standard service) minus the cost to send the items you are keeping (using standard service).

Please check the box to acknowledge our return’s policy, by doing so you agree to our Return’s Policy of AMT Composites stated above.


Get true expertise & assistance. Speak with one of our professional consultants in Johannesburg, Cape Town or Durban. Call 011 392 4232.

WoodCast 30 is an optically clear commercial grade casting and encapsulation two-part epoxy resin system.

WoodCast 30 – Physical properties

WoodCast 30 Part A (Resin) Part B (Hardener) Mixed
Mix Ratio (Weight) 100 p.b.w. 60 p.b.w. 60% (Mix Ratio)
Mix Ratio (Volume) 100 p.b.v. 67.7 p.b.v. 67% (Mix Ratio)
Viscosity (cps @25°C) 1500 +- 200 400 +- 100 1100 +- 200
Specific Gravity @25°C) 1.14 +- 0.02 1.01 +- 0.02 1.05 +- 0.02
Apperance Transparent Light Amber Light Amber/Transparent
Pot Life @25°C 45 to 60 min

Application method

  • Brush
  • RollerSqueegee
  • Pour/casting

A Propane burner can be used to pop bubbles that appear on the surface.


Preheat the epoxy to 25°C – 27°C before mixing, this will reduce the viscosity and make pouring easier. WoodCast 30 can also be used to make River Tables.

WoodCast 30 can also be Blled with a variety of materials for different visual effects such as wood chips, Aluminum Powder, Marble Powder, Stone Chips, Pebbles, Iron Filing, Copper, Bronze or Brass Powders, Cast Magic Powders.

WoodCast 30 can also be pigmented. After preparing the mix, mix thoroughly for at least 2 to 3 minutes and apply using your preferred method. The “Dirty Pour” is one such application method with many YouTube videos on the technique. https://www.youtube.com/watch? v=MrVKifoQ0M0

Do not exceed 10mm thickness per application, allow to cool before mixing & adding additional layers. It is advisable to do tests with fillers and pigments before committing to a job.

Safety & Handling

Epoxy Resins & Hardeners are chemicals. Normal Health and safety precautions apply when handling these products.


  • Adequate ventilation
  • Use of gloves and safety glasses
  • Use of barrier creams
  • Use of a skin friendly hand cleaner

Never Use any solvents to clean your hands.


  • Measure Accurately (Preferably on a scale)
  • Mix parts A & B thoroughly (Use flat paddle and mix for a minimum of 2 minutes)
  • Allow Adequate time to fully cure before using


  • Applying on Oily or Contaminated Surfaces
  • Apply to damp or wet surfaces
  • Working in a Cold Environment below 18 °C

Storage and stability

The shelf life is 24 months in a dry place and in original unopened containers at room temperatures between 18 – 25°C.

Faq, Processing Tips And Ideas – Tips To Help Produce A Perfect River Table

Mix Ratio

Mix at the correct mix ratio. Use an Accurate Scale to do this. Scales are available at AMT Composites. Woodcast30 is mixed at 100 parts Part A plus 60 parts Part B–BY WEIGHT (100:60) Very Important.


Mix the two parts together very well. Stir with a flat paddle stick for a minimum of 3 minutes, scraping resin from the sides and bottom of the containers into the mix. Then transfer the mix to another container, mix again and then pour.

Maximum Depth Per Pour

Do not exceed 10mm per pour. The chemical reaction that occurs, generates heat. Large volumes of resin can generate excessive heat, which can lead to an exothermic reaction, and cause the resin to discolour, crack and warp!

Time Between Pours

Each pour must be allowed to cool down to room temperature before adding additional layers. It is possible to achieve 2 to 3 pours per day, depending on conditions. Use an Infrared thermometer to measure the temperature.

Colour Consistency

In order to ensure even colour throughout the resin in a multiple layer pour, first calculate the total volume of Epoxy needed for the entire job, then work out how much resin and hardener is required and mix the colour into the resin portion only.
Then draw off the required amount of pre-coloured resin and add the hardener for each pour.

Calculating How Much To Use (use our calculator at the top of this page)

  1. To calculate the volume of resin required, measure the length, breadth and depth and convert to liters.
    A table 2met x 900mm x 50mm deep is:
    200cm x 90cm x 5cm = 90000cm³ 90000/1000 = 90Lts. The Specific gravity of the material is 1.05.
    So 90Lts x 1.05 = 94.5Kg is total amount of Resin and Hardener required.
  2. b. To calculate the separate amount of resin and hardener required, divide the total Kilograms by 1.6 and that will give you the amount of resin required
    94.5/1.6 = 59.06Kg Resin (Mix Ratio is 100:60)
    59.06 x 60% = 35.44Kg Hardener Total weight = 94.5Kg Mixed Total
    For tables with wood and live edges it is sometimes difficult to calculate the exact amount of resin required because of the irregular shape of the wood.
    To do this see the example illustrated below:
    Length x Average Breadth x Height
    Average breadth is the sum of the measurement divided by number of stations e.g. 10,5cm + 13.6cm + 11,4cm + 19,4cm + 20,2cm + 14,6cm + 11.8cm + 8,3cm = 109.8/8 = 16,3cm

Casting Box

Build your casting box from Melamine chipboard. Glue all joints with a liberal bead of White Wood Glue in all joints and screw the box together. Then wipe off the excess glue with a damp cloth and let dry. Optional additional safety, glue the outside of the joints with a Hot Melt glue gun.

Release Agent

Use Ram wax as your release agent. Apply a coat all over the box and edges, allow to dry for 20minutes then buff off with a soft cloth.

Wood Will Float

Wood will float in the resin so it must be clamped or screwed down to prevent this.

Cold Weather

In cold weather it is advisable to heat your resin and hardener to at least 27°C before mixing and casting. To do this, place your resin and hardener bottles in a bucket of hot water. Shake the bottles to mix the resin before measuring the temperature. Use an Infrared thermometer, available from AMT composites.

Surface Tension Issues

Casting thin layers (<5mm) of epoxy over wood, can lead to surface tension issues, where the resin cures with dimples on the surface. We recommend a minimum of 5mm or more to try and alleviate the surface tension.

Bubbles in the Casting

There will always be bubbles present in the resin after mixing. These will rise to the surface after a while and they can be popped with the aid of a gas flames. Mini Gas tourhes are available at AMT Composites.
Some woods are very porous, and air will continue to escape from tiny holes when under the resin. In order to avoid this happening, it is advisable to first seal the wood with a coating or two of resin. Place the wood in the sun and paint on a layer of Woodcast30 and let dry. The sun will help heat the surface, open the pours and thin the resin so it penetrates the wood.

Gas Flame vs Heat Gun

A gas flame if the preferred method to pop surface bubbles. A heat gun can be used, but it does create waves, which can distort the surface.

Adding Pigments

When adding pigments, be very careful not to add too much as they are very strong. For small batches, use a toothpick to add small amounts of pigment and stir them well into the epoxy. A maximum of 2% to 3% by weight is normally sufficient.

There are also many different glitters and pearl essence powders that can be used in these Epoxy resins, it is impossible to go through them all and a subject all on its own. It is advisable to do some tests of your own to get the affects you desire.

UV Stability

Woodcast 30 is not UV stable. It works extremely well for indoor applications but is not suitable for outdoor use. However, the addition of UV stabilised pigments will greatly improve the UV stability of the resin system, so much so that it could even be used outdoors. For clear castings where UV stability is required, you can use the Kristal range. But even that will not be able to withstand full exposure to African sun for extended time. The only true UV stabilised resin systems are Polyurethanes. We stock the Crystal Clear Polyurethane Resin system.

Woodcast 30 Sanding and Polishing Recommendations

There is a reasonable amount of work required therefore we have developed a sanding and polishing process that gives good results:

Planing or Routing wood/epoxy to achieve flat surface

(This step is not always required as the casting may already be very flat and smooth)

What to take off the top?

  • We advise a minimal cut of 1mm or less. Be careful; if you cut too thick, the epoxy will grab the planing knives and throw the piece. A thicker cut can also generate excessive heat that will affect the surface finish, or
  • With a router sled remove 1mm or less per pass.

Drum sanding

Drum sanding can even out the top or both sides of the piece, depending on the machine. Feeds should be medium with grits of less than 120. Finer grit paper of 220 or higher should be used at slower speeds. Sanded depth will vary, but 0.5 to 1mm per pass should be the maximum. Be careful to make sure sandpaper is clean and free of material as the epoxy can leave a residue on the paper and gouge the material on the next pass.

Random Orbit Sanding

  • Use a step-up dry sanding method beginning at 80 open grit and proceeding in finer open grit paper increments: 80, 120, 180, 240, 320, 400, 600, 800, 1000, 1200 and 1500.
  • Wet sand using foam backed sanding pads at medium speed at 2000 grit. Clean all residue between sanding steps.
  • Wet sand at low rpm using 4000 grit foam backed sanding pads, making sure surface is always wet.

Material should be clear and slightly hazed. Do not overwork or overheat.


Use a variable speed Rotary polisher. (IMPORTANT)
We recommend Mirka Polarshine 10 – P1500 compound with a Lamb’s Wool polishing Bonnet at low speed so as not to heat the surface, taking time to polish and keep pad lubricated with Mirka compound.

  • Using a lamb’s wool polishing bonnet, buff at 2000 rpm until surface imperfections disappear. If you don’t have a lamb’s wool polishing system, high quality foam polishes pads can also be used with a Random Orbital polisher. They are formulated to be used at specific speeds.
  • Using a 2000 grit foam polishing pad, buff at 1800 rpm and
  • Using a 3000-grit foam polishing pad, buff at 1600 rpm.


Hand buff surface with a clean cotton terry towel or clean microfiber cloth to a brilliant finish.

Follow safety precautions on the technical bulletin when mixing and pouring WoodCast30. When machining, sanding or polishing fully cured epoxy, wear a NIOSH approved respirator, protective eyewear and clothing to minimize skin contact. Results may vary depending on how closely directions are followed, quality of equipment and aptitude/experience of artisan. In all cases, AMT Composites is not responsible for the outcome due to the above variables. If results are in question, we recommend testing on a small test epoxy casting before scaling up to a large project.

Nourishing/Coating Oils

Odie’s Oil is an excellent wood finishing oil, which can be use over the wood as well as the epoxy to get a beautiful sheen finish associated with a sanded finish.
We have had excellent results finishing the epoxy and wood surface to P600 with Abranet sanding discs on a Random Orbital Sander and then coating with Odie’s Oil on both the wood and epoxy surface.

Weight 1.6 kg
Dimensions 30 × 30 × 30 cm


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Woodcast 30 Epoxy Resin – How much do I need?

Woodcast 30 Resin Calculator

Woodcast 30 Resin Calculator

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Step 1
To calculate the volume of resin required, measure the length, width and depth, and convert to liters.

A table 2000mm (L) x 900mm (W) x 50mm (D) deep converted to centimeters is:
200cm (L) x 90cm (W) x 5cm (D) = 90000cm³

Divide the answer by 1000 to get liters.
90000/1000 = 90L

Step 2
Now you need to convert the litres in Step 1 to kilograms as Epoxy Resins must be accurately weighed on a scale, not measured out by volume.

To do this, you multiply the total litres by the Specific Gravity of the resin you are using.
For this build we are using WoodCast 30 with a Specific Gravity of 1.05

Multiply the 90L x 1.05 = 94.5Kg
(Litres x Specific Gravity)

This is the Total Weight in Kilograms of Woodcast 30 Resin & Hardener you will require.

Step 3
Now you need to work out what the separate Resin & Hardener portions are.

To do this you need the know the Mix Ratio of the Epoxy Resin System you are using.

Resin portion required
The Mix Ratio for WoodCast 30 is:

Divide the 94.5kg by 1.60
(Weight/Mix Ratio)
This equals 59.1kg and is the Resin portion required.
You will need 59.1kg of Resin.

Hardener portion required
To calculate the amount of Hardener required, multiply the 59.1kg by 60%.
(59.1 X 60% = 35.4kg)
You will need 35.4Kg Hardener.

Check your calculations by adding the 59.1kg Resin + 35.4kg Hardener.
This should equal 94.5kg (The total weight of Resin & Hardener combined)

To summaries: We need a Total of 94.5Kg, of which 59.1kg is Resin and 35.4kg is Hardener.

The above calculations is obviously for a table without any wood.

Depending on the shape of the wood used in your river table, you will need to calculate the volume of the river between the two piece and/or any additional areas that should include Resin.

You can use the example below to help you calculate the amount of resin needed.

In the real world we are not building a slab of Epoxy Resin 2000mm (L) x 900mm (W) x 50mm (D) deep. Rather, we are using Epoxy Resin with Wood to create an Epoxy Resin River Table.

Thus, the amount of Epoxy Resin needed will be different. How do we go about calculating exactly what we will need?

For tables with wood and live edges it is sometimes difficult to calculate the exact amount of resin required because of the irregular shape of the wood.

The length and depth are easy, but the width varies, so you need to work out the average width.

To do this, see the example illustrated below:

Formula to calculate the required amount of Epoxy Resin needed
Length x Average Width x Depth

Average width is the sum of the measurement divided by number of stations – 8 stations in the diagram below.

Station 1 – 10.5cm
Station 2 – 13.6cm
Station 3 – 11.4cm
Station 4 – 19.4cm
Station 5 – 20.2cm
Station 6 – 14.6cm
Station 7 – 11.8cm
Station 8 – 8.3cm

Total Stations 1+2+3+4=5+6+7+8 = 109.8cm

Divide this Total by the 8 stations.
109.8/8 = 16.3cm

This is your average width, and the width you will use in the calculation steps above (Steps 1, 2 & 3) to calculate the amount of resin required for your project.

Step 1
Calculate Volume

200cm (L) x 16.3cm (W or Average Width) x 5cm (D) = 16300cm³
Divide the answer by 1000 to get liters.
16300/1000 = 16.3L

Step 2
Convert to Kilogram

16.3L x 1.05 (Specific Gravity of WoodCast 20) = 17.1kg
17.1kg is the Total Weight of Resin & Hardener required.

Step 3
Calculate Mix Ratio of Resin

Calculate Resin portion required
17.1kg/1.60 (Weight/Mix Ration of WoodCast 30 100:60)
10.7kg of Resin required
Calculate Hardener portion required
10.7kg x 60% = 6.4kg
6.4kg of Hardener required

Check Calculations
Resin required + Hardener required should equal Total Weight required.
10.7kg (Resin) + 6.4kg (Hardener) = 17.1kg