What our customers are saying about us

We’re the #1 driveway sealing contractor in Portland, and we’re here for all your sealcoating needs, whether residential or commercial. Our customer reviews say it all:

RESIDENTIAL

Jeff and his crew did an amazing job on my extensive driveway. They were on time with their service, very quality oriented, and went above and beyond my expectations. We had an unexpected thunder storm during installation that washed out part of the sealer. They came back and repaired this area ASAP without me even asking about it.

Tod H.

A Satisfied Customer

As a home owner with a 700+ foot long driveway, I was worried as to the cost and time involved in sealcoating our driveway. Jeff from Black Diamond Sealcoating not only came in with a great bid, but very quickly had his crew on site with a superior product and professional installation. The crew was outstanding, even after I left our sprinkler system on. They not only coated that wet area twice but did not charge me for my own mistake. I will definitely use them again!

Marc A.

Residential Customer

“Excellent. Jeff informed us of the work to be done and the expected timeline. All was completed within the time line and with EXCELLENT results. We are very pleased with the work!”

Private Customer

A Satisfied Customer

“They did a fantastic job and were easy to work with.”

Private Customer

A Satisfied Customer

“Jeff and crew did our job on the cusp of the rainy season. We really appreciated their professionalism, doing what they said they would do when they said they would do it. Very good communication skills with us and the renters at the job location. Many people have said the job results are excellent. Thanks!”

Private Customer

A Satisfied Customer

“It went great. They showed up in the morning they said and did an outstanding job, paying close attention detail. Jeff’s price was fair and I’ll be using him again in a few years.”

Private Customer

A Satisfied Customer

COMMERCIAL

I’ve used Black Diamond Sealcoating for multiple projects in the Portland Metro Area. Each time, it was a very professional, smooth project. The pricing was always competitive, and the project was always completed with top-notch quality. I would highly recommend Jeff and his company for any projects, and they will be my 1st call for any future needs.

Pete C.

Commercial customer

Jeff and his team did a great job of prepping, including scrubbing off the moss, and then put a beautiful sealcoat on. No overspray, clean edges, solid consistent coverage, and no hassles. The result is top-notch and really adds class to the property.

Kevin Q.

Commercial Customer

“Awesome work!” I have been a Property Manager for 30+ years here in the PDX area, and I have had the opportunity to utilize a number of other companies in the past for my seal coating maintenance needs. We needed to have two of our properties asphalt areas sealed, and choose to go with Jeff’s bid, as it was very precise and accurate! “I Highly Recommend, Black Diamond Sealcoating!! Jeff and his crew were very punctual, professional, and highly knowledgeable. They had no problem working with us closely on both projects, and did a great job in prepping, and cleaning prior to the actual application. After they were finished, they left both properties looking perfect, and “Professionally Done!” “I won’t hesitate calling them for any of or future pavement, or striping needs!”

Private Customer

Commercial Customer

Call us, the top driveway sealcoating contractors of Portland, to get started on your driveway, asphalt, or parking lot repairs.

Google Reviews

Bill

October 28, 2022

Jeff and his team were easy to work with and we love the result!

Kasey Dunbar

September 19, 2022

Would definitely hire again for future work! Black Diamond was prompt, communicative, processional, and efficient. Our employee parking lot has never looked better.

Katie-Lee Baker

August 29, 2022

Jeff and his crew recently resealed and striped the parking lot at my hotel. They were very efficient and professional. I was extremely appreciative of Jeff's flexibility when it came to doing the job in 2 halves to not displace all my guest's vehicles at once, delaying due to vehicles not yet moved, the rain and a couple of other factors. That flexibility and willingness to do whatever it takes to get the job done is why I will continue to recommend them!

Jim Jaso

August 24, 2022

Very pleased with the seal coating of my long driveway to my house. Good communication and follow-up. Job was completed on time and looks great. I very much recommend.

Joshua Doering

August 24, 2022

Great company to deal with! Timely, professional, great quality.

H M

August 23, 2022

Black Diamond Seal coating is a wonderful company to work with! They recently coated the private lane that I share with 9 other households and everyone was happy with the work. The quote that was provided was promptly sent and very comprehensive. Pricing was fair and 'in the range' of other suppliers. The team that arrived on-time were friendly and polite. All the work was done as quoted and it looked great when they were finished! I will work with them again!

Bret Brantner

August 16, 2022

Black Diamond Sealcoating did a great job on my lot. Prompt response with the quote. Fair Price. Crew was prompt and finished in the time frame we discussed. Highly recommend Black Diamond Sealcoating.

Todd Brunelle

August 16, 2022

Great company and service. Finally a professional contractor that is dependable and respectful of my time. Jeff does what he says and sticks to the agreement. No surprises, just good old fashioned service the way it should be.

Gary Miller

November 8, 2021

Black Diamond did an excellent job in sealcoating our two private streets. They invested the time to explain their preparation and process, answered all of my questions, arrived on time and completed the sealcoaring. They even returned to inspect the job and applied additional coating where needed. I would highly recommend Black Diamond.

Cherie Lingelbach

November 3, 2021

Black Diamond was wonderful to work with. Our HOA has two private streets to maintain and they performed crack repair and seal coating for us. They had a very competitive bid, did great work and communicated well throughout the process. We had to be flexible with scheduling due to changing weather - but they adapted and worked with us to get the job done. Would highly recommend and would hire them again if needed.

CALL US

971-570-1206