Discussion in the hokey ass message board started by fat ass whitewalls, jul 17, 2015. Valtec ultra conversion lacquer is a high performance, postcatalyzed lacquer formulated for use on kitchen cabinets, furniture, or anywhere a tough, durable coating is needed. Providing a good blend of process ease, performance, and appearance, this topcoat has a. Mar 12, 20 veneer checking is a common occurrence in woodworking. Lacquer cracks are present in high myopia and can lead to choroidal neovascularisation and macular haemorrhage, which in turn can cause central visual loss but it is not very common. All products general industrial coatings sherwinwilliams. Opticlear 275 demonstrates very good moisture, household chemical and mar resistance. Compressor in good working order and drained once or twice daily and pressure regulator controls, and moisture trap installed in the air line as close to the spray gun as possible within 10 to 25 feet of the gun. Conversion varnish is a postcatalyzed coating with good spraying. Someone gave me a quart of the seagraves to try, but i have not yet.
Choose a lacquer repair kit which contains the substances that you can use to fill the cracks in the lacquer. Compressor in good working order and drained once or twice daily and pressure regulator controls, and moisture trap installed in the air line as close. Conversion varnish application issues thefinishingstore. Valtec precatalyzed lacquers are premium quality finishes formulated for excellent durability and ease of use. When the finish chips, it can show discolored material underneath, and if it gets gouged all the way to the wood, moisture and debris can enter and cause more permanent damage. This product has been formulated to meet 275 gl voc regulations. Where conversion varnish really shines, however, is in the overall durability of the finished product. That the lacquer was sticky and peeling off is suspect and you would have to clean that.
Wood coatings 101 valspar wood pages 1 26 text version. Valtec ultra conversion lacquer 30% solids selfsealing catalyzed lacquer approaches the durability of a conversion varnish in a precatalyzed form catalyzed at the distributor6 month shelf life once catalyzed for any application where higher performance properties are. Jun 24, 2010 a conversion varnish is a highend solids, twopart postcatalyzed lacquer, which means a hardener must be mixed with this product for the application. Now that you have a clean and scratch free finish you can concentrate on filling the cracks. Opticlear 275 is supplied at a ready to spray viscosity. Recently, the doctor has found lacquer cracks in my eyes.
A conversion varnish is a highend solids, twopart postcatalyzed lacquer, which means a hardener must be mixed with this product for the application. Megavar catalyzed clear vinyl sealer is a versitile, sanding sealer offering numerous beneifits for the professional woodworker. Em7000hbl water based acrylic lacquer is an ultra clear, nonyellowing water based acrylic lacquer that utilizes advanced copolymer resins and hapsfree solvent technologies to provide a unique, selfleveling clear coat designed for custom and commercial applications. Veneer checking is a common occurrence in woodworking. At that point i was just looking to create higher quality, professional finishes and brushing paint on or rolling wasnt going to.
Universal flattening paste universal retarder urethane reducer valtec ultra catalyst waterborne retarder zenith waterborne conversion varnish. Repairing cracked lacquer varnish on doors home guides. As humidity rises the wood will swell and as it falls it will contract. Kitchen and bath cabinets see a lot of use over the years.
It both looks bad and spells trouble when the lacquer finish on your wood furniture gets damaged. The main differences are that the film builds quicker and the time between coats is shorter. As the name implies, the precat already has a catalyst mixed into it and since the catalyst is rather weak, it has a pot life in the range of months. By mac simmons coatings like conversion varnishes are popular, but require caution when used, for safety and to obtain good results. Conversion varnishs elasticity will help prevent cracking in your finish. Spot and fix the most vexing problems woodshop news.
A lacquer finish is more brittle and prone to cracks than varnish or polyurethane, but the good news is that the cracks are repairable. Cardinal is super durable, and if you are just learning, you might as well learn how to finish with a good product, as every lacquer i have used. Hgh hardware supply is a wholesale and retail distributor of cabinet hardware and accessories, cabinet doors and drawers, coatings and finishing products, decorative knobs and pulls, and more. Some conversion finishes like conversion varnish cure more slowly so be careful of runs and sags and allow more time between successive coats. The crackling could have happened if you over catalyzed the conversion varnish. Sep 01, 2017 a catalyzed lacquer is a coating that dries by evaporation, acting very much like a straight lacquer defined above with no chemical curing or crosslinking and then cures by the reaction initiated by the catalyst. Checking is a mild form of cracking and doesnt go all the way through the finish.
These coatings are technical and this videos purpose is to give a general summary comparison. Other lacquer postcatalyst lacquer is where the userprofessional painter adds in the catalyst at their shop before using it. The most common precatalyzed finishes are precat lacquer, vinyl and occasionally a conversion varnish. They have used frazee stain a dark espresso colorand valpro valtec. Theres a specialty finish called crackle lacquer thats designed to produce cracks for the visual effect. Conversion varnish and lacquer finishes both have their advantages and disadvantages. Varnishes, repairing varnishes conversion finishes work where lacquer products fail because lacquer products dont have chemical resistance or water resistance.
The sherwood cabacrylic lacquer doesnt appear to be a precat lacquer no mention of catalyst on their web site. Cracks in lacquer usually flow out when you respray them. Lacquer finishing trouble shooting guide wood finish supply. It will resist moisture and damage from common household items, and unlike a less costly lacquer based product, which is softer and more susceptible to moisture damage a. Just a few ounces over can screw it all up in the future. Is there another finish that is the precat cab acrylic lacquer. The lacquer is too weak for the epoxy primer to achieve its desired traits. Megavar plus highsolids ww conversion varnish is designed for the woodworker who demands maximum performance in a high build clear finish. Apr 12, 2011 conversion varnish is a catalyzed coating which is very hard and durable. It is a fast drying, easy to apply sealer with excellent clarity and sanding properties. This is the most durable finish available for use on fine hardwoods. Pot life is measured from the time you add the catalyst to the material until the product is no longer usable for spraying. Add an optional catalyst, and it outperforms many conversion varnish products.
Anyone who has to apply veneer or use veneered panels certainly understands what an unpleasant event this can be. The cracking is on oak veneer surfaces only, not on solid stock. Em7000hbl is an ultra low voc ulvoc alternative away from nitrocellulose lacquers and solvent based conversion varnishes. Precatalyzed lacquer show down woodfinishers weblog. Aug 14, 2011 by mac simmons coatings like conversion varnishes are popular, but require caution when used, for safety and to obtain good results. Precat lacquer basics a firsttimer gets tips on the fundamentals for success with precatalyzed lacquer. I have a problem with refinishing a old radio cabinet. Cardinal is the best lacquer i have used, though i have not used any of the other instrument lacquers. Is it wood movement, a veneer adhesion issue, a finish formula problem, or a finish application problem. Kitchen cabinetry finishes 101 expert kitchen designs. This coating has a long pot life once catalyzed 6 months and is supplied ready to spray with no further reduction needed. A single recoat may be enough to heal some cracking. There are other considerations before jumping on the conversion varnish bandwagon. They offer excellent mar, solvent, chemical and moisture.
It simulates the look of old paint, but a clear coat is used over the crackle layer to protect it and the substrate. The lacquer top coat dried and sealed in the gases from the primers trying to escape during the normal curing process. Theres a specialty finish called crackle lacquer thats designed to. Sep 29, 2017 precatalyzed lacquer is very a very durable product and what makes it different from otherregular lacquer is that it has a catalyst or hardener added into in when you purchase it. We are a jobshop for finishing wood and are having a problem with the varnish cracking. While it is not our practice to spray anything over the pigmented lacquer. A catalyzed lacquer is a coating that dries by evaporation, acting very much like a straight lacquer defined above with no chemical curing or crosslinking and then cures by the reaction initiated by the catalyst. At rock creek furniture we use valtec ultra conversion lacquer, by v alspar. It is a very dense finish, with molecules that bond to each other in such a way as to prevent penetration by water and chemicals for up to 2 12 times longer than standard lacquer. Cic coatings is the brand of conversion varnish being used, im very fond of this this particular product as it has been specially formulated to be applied right out of the can with out thinning or retarding, it lays out incredibly smooth and dries quickly. Higher catalyst levels may cause cracking over time.
Lacquer works best as a spray finish, applied to dry wood finishsanded to at least 220 grit. If this is the case you can be cracking the liquid paint or lacquer without affecting the powder coating, under certain mechanical and sometimes thermal conditions. To fix, sand out and apply another coat using the proper lacquer thinner. Its going to be applied on mahogany plywood and hardwood with a wipeon mahogany stain. Conversion finishes are typically sprayed on in a manner similar to that of nitrocellulose lacquer. Question i am using a satin mohawk dura coat precat lacquer on a wall unit. Description additional information product enquiry description. Conversion varnish application issues june 29, 2016 acid finish flexner the finishing store varnish woodfinishing woodwork woodworking conversion varnish, also called catalyzed varnish, is the most protective and durable finish commonly available to amateurs and small shops. Water clear in the can, it resists yellowing due to heat and uva. Valtec ultra conversion lacquer is a cutting edge, high performance coating, built on a unique resin backbone that offers performance of a traditional postcatalyzed product, without the challenges of catalyzing in a shop environment. Most came to the shop with original finish cracking off but remeber they.
These cracks all run with the grain of the wood and appears as the veneer is cracking. You owe it to yourself and your company to give the varicure line a try. With excellent mar, water, solvent and general chemical resistance, valtec is ideal for cabinets, furniture, and other interior wood surfaces. Mar 26, 2014 lastly, todays conversion varnishes can have a pot life anywhere from 8 hrs to 3 weeks. A properly matched spray gun needle, nozzle, and spray cap in good working order. Products change rapidly, and may be available even if not listed online. Jun 02, 2008 the sherwood acrylic conversion coating appears to be precat, but is it a conversion varnish or a lacquer. They are fast drying, offer excellent clarity and provide for enhanced uv protection. Thats why these products fail around dishwashers, where steam comes out, and in the bathroom, where water splashes on cabinets. Valtec self seal precatalyzed lacquers680 voc technical.
Valtec ultra conversion lacquer richelieu hardware. Tips for using super coatings woodworking network skip. Opticlear 275 is a onecomponent precatalyzed lacquer. When i was first introduced to nitrocellulose lacquer and spray finishing. Sherwinwilliams is a leading manufacturer of industrial coatings with a proven history of durability, color, innovation, and service.
Color choice color matching and finishdesign program. With excellent mar, water, solvent and general chemical resistance, valtec is ideal for cabinets, furniture. This will fill the gaps but it will always be slightly visible. Valspars valtec tm selfseal precatalyzed selfseal lacquers are premium quality precatalyzed lacquer finishes formulated to offer excellent durability combined with outstanding ease of use. When i first started dabbling in spraying furniture in january 2015 i never expected to end up here. Em8000cv wb conversion varnish represents stateofthe art formulating by utilizing our exclusive hybrid emulsion technologies that incorporate oilmodified resins and acrylic copolymers into a precatalyzed one part package. Dan teaches you how to blend new lacquer with old lacquer. Conversion varnish requires greater skill in spraying, too thick of a finish can crack. Lastly, todays conversion varnishes can have a pot life anywhere from 8 hrs to 3 weeks. Answer catalyzed conversion varnish is the most durable finish available for wood it will resist moisture and damage from almost all household chemicals even nail polish remover will not damage the product unlike a lacquer product which is softer and more susceptible to moisture damage this product will last years. Apr 01, 2005 if this is the case you can be cracking the liquid paint or lacquer without affecting the powder coating, under certain mechanical and sometimes thermal conditions. Conversion varnish advantages over lacquer youtube.
Its a kit that has 1500 grit all the way up to 12,000 grit, and it works wonders. Precat lacquers become the new standard woodshop news. Could be a conversion varnish or even a precat lacquer. Thinner and faster drying crackle coats result in smaller cracks and islands. I have wanted to try a conversion varnish being told that they are better in. Additional information cautions sherwood pigmented conversion varnish must be catalyzed 3% with kemvar catalyst v66v21 for cure. There is the increased possibility of cracking of the film with material used past its. Always test a glaze specially in a converting or catalyzed system for suitability.
Items subject to change without notice, including stock status and availability. Conversion varnish advantages over lacquer this video answers the question what is the difference between a conversion varnish and a lacquer. Catalyzed lacquers further shifted the definition of lacquer. Conversion varnishes, repairing damage to varnishes. Finishing failures and what to do woodfinishers weblog. Blend new lacquer into old lacquer with flash coats youtube. Emtech em8000cv wb conversion varnish target coatings. Repairing cracked lacquer varnish on doors home guides sf. Apply this paste into the cracks and gently smooth it down. Troubleshooting finish cracking checking on veneer heres an extended detailed discussion of finish cracks that follow wood veneer grain patterns.
Conversion varnish is a catalyzed coating which is very hard and durable. For kitchen cabinetry, there are essentially four kinds of chemical finishes, from least to most superior in quality nc and precatalyzed lacquers, post catalyzed conversion varnishes, and polyurethanes. Cracks in lacquer after powder coating products finishing. Em8000cv provides the rich color tones and durability associated with solvent based coatings in a waterreducible, ultra. If a conversion varnish goes beyond the specified pot life, it becomes gellike and can no longer be sprayed. Then cleaned the wood with a 5050 mix of lacquer thinner and denatured alcohol. Every piece of real wood furniture from countryside is finished with a postcatalyst conversion varnish. The solvents in the second coat of lacquer will liquefy the coat beneath it, which is why you cant put 5 or 6 coats of lacquer on. Post cat lacquer vs conversion varnish lets talk shopbot. Painting furniture with precatalyzed lacquer the weathered. Em8000cv provides the rich color tones and durability associated with solvent based coatings in a waterreducible, ultralow voc, hapsfree coatings system. Summary of common finishes conventional precatalyzed postcatalyzed conversion lacquer lacquer lacquer varnishvalspar luster lac valpro precat, valtec ultra conversion valpro conversionproduct professional, luster valtec precatalyzed lacquer varnish, valguard lac premium lacquer conversion varnishtarget small to medium sizecustomer painting.