Epoxy Dry Block
Yury Morris
I chased little dots of rust, not only on the outside of the block, but also on the nice cylinder bores I had torque honed. I had to wait weeks to assemble that engine before that block quit bleeding those tiny rust spots.
Too much pressure and too fine stone, the hone would just follow the irregularity and make matters worse. It was tricky. With patience I could get the distortion to just under .001 and still keep useable piston clearance. Once that was reached then a light as possible plateau hone.
While starting on a routine freshen, intending to install new aluminum rods, I discovered #2 cylinder with a small crack. The cylinder with the crack, when leaked down, tested the same as the rest for cranking compression. All were 190/195. The engine had been running fine. Plugs looked perfect.
I reasoned that engine was running ok with that crack. No telling how long it had been that way. It had not been apart for 30 runs. If we need it for a few runs it should be OK.No time to fix it, the rods have only 30 runs, so I put the heads and intake back on and got it ready to load in the travel crate.
In doing so I warmed the engine up again, cranked the throttle enough to burst the nitrous. Whooom! After I did, smoke started pouring out the driver side header big time. Oh man! I had hurt a piston.
Later, I found when I burst the nitrous # 6 had cracked the ring land above # 2 ring groove. I found several like that with nitrous engines during my many years. The land cracks behind and away from the piston. You cannot see it. To check, use a small screw driver in the upper and lower ring grooves, and carefully apply pressure up and down. If that land is cracked behind there, it will move.
Moisture mitigating 100% solids epoxy primer that wicks into the concrete surface and prevents hydrostatic pressure from coming through. Excellent penetration and adhesion to wet or dry concrete. Use as primer before other epoxy/urethane systems. Also use as a primer with sand broadcast prior to applying cementitious coating systems.
EB700 is a high quality 700kg/m epoxy tooling board recommended for CNC machining of highly accurate models, patterns or masters as well as low volume production tools/moulds. It offers excellent surface finish, stability and service temperature up to 130C.
EB700 is a high quality 700kg/m epoxy tooling board. This rigid epoxy tooling block is recommended for demanding applications for CNC machining of highly accurate models, patterns or masters as well as production tools/moulds.
Epoxy is the tooling board of choice for high temperature applications and is essential when making prepreg composite moulds or components where, at elevated temperature, this epoxy pattern material will not inhibit the cure of prepregs in the same way that polyurethane (PU) board will.
EB700 Epoxy Tooling Board can be used to produce highly accurate patterns and moulds. Patterns can be used to produce high volume composite moulds, including using prepreg tooling systems (with cure temperatures up to 130C) and where dimensional stability is critical.
For smaller production runs EB700 can be used to produce the working mould itself. In this situation the machined mould - once suitably sealed and prepared - can be used as a mould/tool for the production of composite parts, including the manufacture of prepreg composite components (oven-only or autoclave cure).
For larger patterns or more diverse shapes, it is often necessary to bond multiple boards together or to cut and join a board to produce a hollow 'rough shape' prior to machining. In this case, EA700 Epoxy Tooling Board Adhesive can be used to bond the tooling board, resulting in machinable bond-line which matches the density and behaviour of the surrounding board.
EB700 can be cut and shaped by hand however it is a high density material and better suited to CNC machining. Once machining is complete, the board can be finished to an excellent satin finish using a range of abrasive papers, typically ranging from 400 to 1200.
Depending on the level of gloss required, once the machined board has been finished to the required standard it can either be coated directly with a suitable chemical release agent (such as Easy-Lease) or it can be first sealed using a specialist board sealer before applying release agent.
By using a specialist board sealer, a full gloss superior surface finish can be quickly achieved. Follow the instructions for the board sealer you are using. Easy Composites' S120 Advanced Board Sealer is recommended for sealing EB700 board and can be applied by lint-free cloth or by spray. Typically, 3-4 layers of S120 Board Sealer will provide a non-porous, hard-wearing surface for a low volume production mould. Once hardened the S120 Board Sealer finish can be flatted and polished to a high gloss.
To bond the boards together, you can simply use an epoxy resin as an adhesive. Brush apply a thin layer to each bonding surface, then press the two boards together and allow the resin to fully cure. Our EL2 Epoxy Laminating Resin will work very well for this purpose.
Really the EB700 is a bit on the brittle side for using as a compression mould tool so we wouldn't advise it. It might be okay for a 1 off but probably not if you were wanting to use it for multiple castings.
Yes it can. It can be used for either simple moulds or more complicated multi-part moulds. It does not have the long term durability of a properly made set of pre-preg tooling or billet tool, so is more suited for one off jobs or small production runs. You also need to consider the CTE (expansion) of the board which will limit the cure temperature if you need to maintain dimensional accuracy.
An advanced generation, low odor, low VOC, high solids, water-based epoxy coating for filling surface voids in porous concrete and masonry block in interior and exterior environments. Provides high bond strength, fast curing, and rapid overcoating capabilities and can be topcoated with a variety of water- and solvent-based coatings.
Waterborne Epoxy Block Filler is a high-solids epoxy block filler that can be cleaned up with soap and water. This product withstands repeated cleanings with high pressure water and can be top coated with most generic type coatings.
Many homes and businesses experience leaky basements year after year. The worse time is in the spring after winter accumulation of snow. There are a number of prudent things that you can do to improve drainage against your foundation like roof gutters, grading and improvement of drainage. The recommendations here do not replace that conventional wisdom. It is designed to augment and improve upon these conventional methods.
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