Now the days are getting shorter and colder, we can get on with painting some of our concrete casts, pieces and ornaments which we made earlier in the year.
Starting off on our first paint job of winter 2020, we decided to go with a basic black wash over concrete to create a weather and time worn olde worlde paint wash effect!
Prior to applyng the wash, we applied concrete dusproofer/hardener which is featured in the previous video on the channel. We don’t always use the dustproofer, so results may differ if applied directly to bare or raw concrete.
In this video we try out a product by Bond It called Dustproofer & Hardener for concrete surfaces. The product is designed for concrete floors, but we wanted to try it out on concrete ornaments, pieces and statuary to see if there are some beneficial results.
Bond-It BDH090 Dustproofer & Hardener (5 Ltr) Hardens and Dustproofs concrete flooring on Amazon: https://amzn.to/2ILeeET
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Filling bug holes in concrete ornaments, statuary and pieces. In this video we mix cement at a ratio of 2 parts sand to 1 part cement, add a small amount of PVA glue/bonder and a small amount of washing up liquid/dish-soap to act as a plasticizer/plasticiser (plus water) to fill the bug holes which were present in the concrete pieces as a result of trapped air not being succesfully released and/or tapped/vibrated out during the pouring process.
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After leaving the concrete to cure after casting the pieces last month and waiting 4 weeks to cure, we unwrap the concrete items, wash them down and get them ready for the next stage of preparation.
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Molding and casting an ammonite fossil which is around 500 million years old. There are actually two annomite fossils embedded in the original rock formation – one small ammonite and a larger one. In this series of videos we make a latex mold of the original fossil, build a fibreglass mother mold and cast a replica of the fossil using concrete and plaster of Paris.
Part One 00:00 – Making The Latex Mold.
Making a latex mold from a 500 million year old ammonite fossil. In this video a mold is made using layers of latex. The fossil mold in this video also needs a seam incorporated into the mold for ease of demolding casts for when the mold is completed.
Part Two 11:16 – Building The Fibreglass Mother Mold.
NB: Best to put wax on first followed by PVA application when applying the release agent process.
Following on from the video on latex molding an ammonite fossil, we make a seven piece mother mold to house the latex mold. This video is a short and brief video showing the process and more in depth videos about molding can be found on the channel.
There are many ways to make molds and this video is showing how we make molds here at present, which is our preferred way – it works for us and what works for one person may not work for another.
The model in this video is a 500 million year old ammonite fossil which came out of the mold in one piece. The mold which has been made from the ammonite fossil is now ready to create replica fossils with concrete or any other appropriate material which is compatible with the latex mold.
Part Three 14:55 – Casting The Fossil.
The final part in the series of molding & casting an ammonite fossil. In this video, we finally get around to casting the fossil in concrete and we also make a cast with plaster of Paris.
The video footage is taken from two existing videos on the channel which feature concrete and plaster of Paris casting. There are also two other parts to go with this fossil casting video which are making the latex mold and making the mother mold with fibreglass.
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Finding bug holes or too many bug holes in your concrete castings can be a real pain. Possible reasons for bug holes in your concrete are very briefly explained in this short and quick video.
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The final part in the series of molding & casting an ammonite fossil. In this video, we finally get around to casting the fossil in concrete and we also make a cast with plaster of Paris.
The video footage is taken from two existing videos on the channel which feature concrete and plaster of Paris casting. There are also two other parts to go with this fossil casting video which are making the latex mold and making the mother mold with fibreglass.
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This is a short video with how we use a vibrating table with casting concrete into molds and is intended to compliment the already existing videos which feature concrete casting on the channel and/or social media platform.
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After a few weeks casting concrete pieces and statues at the end of August and in September here in the UK, we can show how a good quality mix of concrete will create a good quality concrete cast. There were a few ‘bug-holes here and there on this small batch of three, which can be remedied by a cement filler after the casts are cured and for future casting to spend more time tapping and vibrating unwanted air out of the molds and seeing the places in the molds where the bug-holes are likely to form.
The concrete recipe used for casting in this video:
1 X Part cement.
2 X Parts sand.
2 X Parts aggregate.
PVA (UK) bonder/bonding agent.
Plasticiser/plasticizer.
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In this video we focus more on the concrete mix used here at Dramamask Evolution and looking for a consistency which isn’t too firm and not too slushy either – a mix which keeps it’s shape, but is also cooperative in being moved around the mold/mould.
The concrete recipe used in this video:
1 X Part cement.
2 X Parts sand.
2 X Parts aggregate.
PVA (UK) bonder/bonding agent.
Plasticiser/plasticizer.
If you enjoyed this video, please like and share. 🙂
