proven Professionals.

ASPHALT Maintenance

Black Diamond Sealcoating is the leading asphalt sealcoating company in Portland, with the knowledge and experience to handle any size job. We are big enough to get the job done but 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 asphalt sealcoating company located in Portland, Oregon. Our work areas cover the entire Portland metro, Tri county areas, southern Washington 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 service 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 Customer Promise

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 we offer

Black Diamond Sealcoating offers professional residential and commercial asphalt maintenance services including crack filling, sealcoating, asphalt repairs, and line striping and pavement marking services for your parking lot, home driveway or roadway, Browse our site to learn more about the asphalt maintenance and services we provide, then contact us to schedule your initial consultation.

Residential SealCoating

Commercial SealCoating

Parking lot Striping


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

We service the Portland Metro area, Tri-county area, Hood River County and will soon service areas in the state of Washington as well. Our services include: driveway sealcoating, parking lot sealing, hot crack sealing and pavement markings.

Contact us today at 503-695-2127 for a free, no hassle estimate or simply request an estimate online.

parking lot striping and stenciling


We Offer Senior & CHURCH Discounts!


“Jeff and the crew at Black Diamond Sealcoating 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


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. 


parking lot striping


SealCoating & Maintenance

asphalt sealcoating


Lot Striping & Maintenance

asphalt sealcoating


Crack Filling & SealCoating