proven Professionals.

portland sealcoat company & ASPHALT Maintenance

Black Diamond Sealcoating is one of the leading sealcoat and asphalt maintenance companies in Portland, with the knowledge and experience to handle any size job. We are big enough to handle any sized job but also small enough to provide personal, one-on-one service, and that is important.

We pride ourselves in our ability to accommodate any schedule for home and business owners alike. We have flexible hours to ensure we get the job done when it’s convenient for you – we strive to minimize any impact on you or your customers as often as possible.

We use commercial equipment and the industry’s best material to achieve a professional result that you can be proud of, saving thousands of dollars over the life of the asphalt.


We are a local sealcoat and asphalt maintenance company located in Portland, Oregon. Our work areas cover the entire Portland metro, Willamette Valley, southern Washington, Hood River County (larger jobs) and Vancouver areas. We are fully licensed, insured, and bonded for these service areas.

When it comes to working for you, we understand the significance of the project we’re assigned to, no matter how big, small, simple or complex. We strive for open dialogue with our clients so you know exactly what your project entails, including cost, timeframe, and any challenge up front. We want to make sure we meet all of your expectations at a competitive rate. We offer prompt and professional sealcoat and asphalt maintenance services in Portland and use the best products available.

Our company has earned top reviews on BBB, Angie’s list, Thumbtack and Google to name a few.

Our Commitment to Our Customers

At Black Diamond Sealcoating you can guarantee prompt communication, and service, including professional sealcoating, crack filling and pavement marking services. Our sealcoat and asphalt maintenance team in Portland utilizes the highest quality asphalt and sealcoating products on the market in addition to providing fast, efficient, and top quality customer service. Black Diamond Sealcoating strives to build and keep an open, honest and lasting relationship with every customer, we want to earn your business for life.

It is our promise to our customers to provide high quality and cost-effective parking lot or driveway repairs for your Portland home or business. Our highest priority is to strive for excellence in every job we do.

What our services and products offer

Black Diamond Sealcoating offers professional residential and commercial sealcoat and asphalt maintenance services throughout Portland including parking lot stenciling, crack filling, various types of sealcoating and asphalt repairs for your parking lot, home driveway, roadway or industrial lot, Browse our site to learn more about the asphalt maintenance and services we provide, then contact us for a free no hassle bid.

Residential & Commercial SealCoating

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  • Beautify and fortify asphalt to prevent premature breakdown
  • Prevent oxidation and deterioration
  • Spill and damage protection
  • General maintenance and upkeep

Parking Lot Striping

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  • ADA compliance
  • Helps your lot communicate better
  • Efficient traffic and pedestrian flow
  • More visible in bad weather or winter time
  • Stenciling/curb painting
  • Arrows, specialty items (Electric vehicle, etc.)

Crack Filling

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  • Extend pavement life

  • Prevent water damage to base layer

  • Prevent breakup

If you’re in need of driveway sealing services, parking lot maintenance or parking lot stenciling in Portland, call Black Diamond Sealcoating. We have you covered every step of the way by providing residential and commercial clients with affordable, professional asphalt maintenance services.

We service the entire Portland metro, Willamette Valley, southern Washington, Hood River County areas (Large jobs) and Vancouver areas and will soon service areas in the state of Washington as well. Our services in Portland include: sealcoat and asphalt maintenancedriveway sealcoating, parking lot sealing, hot crack sealing and pavement markings.

Contact us today at 971-570-1206 for a free, no hassle estimate or simply request an estimate online.

parking lot striping and stenciling



Our Customer Promise

At Black Diamond SealCoating you can guarantee prompt, professional sealcoating, crack filling and pavement marking services. We utilize the highest quality asphalt and sealcoating products on the market in addition to providing fast, efficient, and quality customer service. 


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

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


parking lot striping


SealCoating & Maintenance

asphalt sealcoating


Lot Striping & Maintenance

asphalt sealcoating


Crack Filling & SealCoating