Questions and Answers for Varathane Varathane 1 Quart Clear Gloss Oil-Based Exterior Spar Urethane

A:  Great question! Rust-Oleum Varathane Oil-Based Spar Urethane can be applied to exterior painted wood surfaces will help protect again the elements and UV exposure. Please keep in mind, since this is an oil-based wood finish, it will have a warm, golden tone to it. For a crystal clear finish, we recommend Rust-Oleum Varathane Water-Based Spar Urethane instead. https://www.homedepot.com/p/Varathane-1-qt-Clear-Gloss-Water-Based-Exterior-Spar-Urethane-2-Pack-250041H/202057143 - Rust-Oleum Product Support 3

A:  We like the way you think! Yes, Rust-Oleum Varathane Oil-Based Spar Urethane can be used. Make sure the glue has fully cured prior to applying the spar. - Rust-Oleum Product Support 3

A:  Thanks fore reaching out. Varathane Oil Based Spar Urethane cannot be used on boat surfaces below the waterline, it is not formulated to withstand water immersion. It can be used on wood surfaces above the waterline. - Rust-Oleum Product Support 6

A:  Great question, Bobby! Rust-Oleum Varathane Spar Urethane Oil Based is recommended for use on stained, painted, or unfinished wood. If applying over an epoxy, a test application is suggested to confirm the desired results are achieved. Light sanding is also suggested to create a surface profile for adhesion. - Rust-Oleum Product Support 4

A:  Thanks for reaching out. Varathane Oil Based Spar Urethane can be applied to a wooden outdoor wooden swing set, it cannot be applied to the portion that will be underground. - Rust-Oleum Product Support 6

A:  Yes, it definitely gives protection. Note it is very glossy look. If there is big gap on surface, need filler first 

A:  I used this to seal a 20+ year old particle board workbench 3' x 6'. The top had been abused, weathered and was quite porous. After disc sanding it with coarse grit, it took about 4 coats (drying in between) to bring it to a nice smooth glass like surface. It has been holding up pretty well. However, it is no longer exposed to sun and rain. I do not have any experience with particle board coated with this that is thereafter subject to the elements. I've used it on 4x4 redwood posts fully exposed to elements. I used two thin coats to start (Don't over-apply it s it will crack or peel), and every few years lightlly sand and put another thin coat on any sides that are showing deterioration. They are doing well now for past 10 years in Arizona sun.

A:  Yes- only if both sides and edges are coated.

A:  Glad to help out, Robert. Rust-Oleum Varathane Oil-based Spar Urethane can be applied to seal particle board. We would still recommend lightly sanding and cleaning the surface first for the best adhesion. - Rust-Oleum Product Support 5

A:  I used 2 coats of this product on a wooden patio door threshold 3 years ago. Still looks great. Used the rest of the can on pressure treated utility trailer floor. It did not work in that case. Within one year, the sealer had peeled off. But, to be honest, I did not use the product as directed.

A:  Happy to help! While Rust-Oleum Varathane Oil-Based Spar Urethane is great for exterior surfaces, we do not recommend it for use on surfaces that will be walked on or that will receive any sort of vehicle traffic. This type of exposure will cause the coating to crack and peel. - Rust-Oleum Product Support 3

A:  I applied this to an outdoor bench and it has kept the surface protected for the past 2 years. If you apply this to both the inside and outside surface, you may need to reapply it every 2 or 3 years, due to weathering.

A:  Great question, Tess! Rust-Oleum Varathane Oil-Based Spar Urethane is suitable for use on previously painted wood surfaces and will provide protection from UV rays and the elements. - Rust-Oleum Product Support 3

A:  It shouldn't be a problem as long as the chalk paint is cured (not just dry to the touch) I would recommend testing it on a spot unlikely to show; that way if it does 'orange peel' or crack the chalk paint you will only have to repair a small spot.

A:  You wont be able to use the chalkboard once you use this over it. This will seal it.

A:  I am unsure this would work as you intend it too. Part of the process is to ensure there is no dust or anything on the surface before you put it on. Chalk paint I believe is inherently dusty isn't it? Putting Kilz paint on under the chalk paint might be a better approach though the chalk is somewhat porous anyway so it might retain water. Sorry for somewhat of an ambiguous answer but I hope it helps a little.

A:  Hi Brad, thanks for reaching out! We would recommend our Varathane Spar Urethane for exterior applications only. Our Rust-Oleum Chalked Matte Clear is an excellent choice for protecting your chalk paint application in the bathroom: https://www.homedepot.com/p/Rust-Oleum-30-oz-Clear-Ultra-Matte-Interior-Chalked-Paint-301498/307244929 - Rust-Oleum Product Support 2

A:  I would hesitate to use this over chalk paint, especially light colors. It is likely to yellow over time. I think multiple coats of the Varathane clear waterbased poly would be a better choice. I have used that on multiple projects. Do a few extra coats on the top where it is likely to get wet (maybe a total of 6-7) and sand in between uses for a nice smooth finish. I used this outdoors over bare pine and it is lovely.

A:  Yes it will give It a seal and kind of a glossy look and feel I used this for cornhole boards so that beanbags would slide better across the boards

A:  A Spar Varnish would be better suited to bathroom.

A:  Hi Davis, thank you for reaching out! Our Varathane Oil-Based Spar Urethane is recommended for exterior wood surfaces only. For a bathroom vanity, we would recommend using our Varathane Ultimate Polyurethane, in either a water or oil-base: https://www.homedepot.com/p/Varathane-1-qt-Clear-Gloss-Oil-Based-Interior-Polyurethane-341719/305583790 - Rust-Oleum Product Support 2

A:  This is a very good choice for your project. It takes a while to dry, but it's worth it. I would suggest lightly sanding after each coat has dried before applying another coat. The more coats you apply, the glassier the surface appears if you use gloss, but that is up to you.