About Us

Copyright @ Wayne Pfaff. All rights reserved.

Where were you in 1936?

Monday - Friday -- 7:00 - 4:00
Saturday -- CLOSED
Sunday -- CLOSED

What keeps the contractor and D-I-Y coming back to Thoro System?

Thoro System Waterproofing

Monday - Friday -- 7:00 - 4:00
Saturday -- CLOSED
Sunday -- CLOSED

701B Ashland Ave
Suite 8
Folcroft, PA 19032-1414
610.583.5502 (Phone)
610.583.5514 (Fax)

Normal Hours

Perfect Protection Products... for Concrete and Masonry

Winter Hours

For over 80 years, Thoro System Waterproofing Inc., a wholesale/retail supplier of waterproofing and restoration materials for concrete and masonry, has been serving dealers, contractors and D-I-Y’s in Eastern PA, South Jersey and Delaware.

Starting in a one-car garage in Drexel Hill PA in 1936 and moving from there to Springfield in 1947, Thoro System quickly gained the trust and following of dealers, contractors and homeowners alike.  In 1989, Thoro System Waterproofing Inc. was forced to move out of Springfield because of space limitations of their existing facility, and chose to relocate in Folcroft, PA.

Currently in a 12,000 square foot facility located at 701B Ashland Ave., Unit 8  Thoro System has greatly
expanded its product line while still specializing in products to waterproof, restore, protect and beautify concrete and masonry.

“Buy where the professionals buy” is the challenge we offer the local D-I-Y!  With more and more cost-conscious homeowners wanting to tackle their own waterproofing and masonry repair projects there is an ever-increasing need for professional advice and step-by-step help … something most national chain-store building material and big box stores cannot provide.

Product knowledge, wide selection, competitive prices.  The sales staff at Thoro System has an average 37 years’ experience.  We eagerly look forward to the unique challenges and problems of your projects, no matter how large or small.

You would be hard pressed to find another store with the selection you will find at Thoro.  You will find in stock three different types of caulks in over 120 different colors, 15 colors of stucco in stock, over 20 clear water repellents or sealers, 20+ repair mortars, self-leveling underlayments and overlays, epoxies, waterproof decorative coatings, E.I.F.S systems, masonry cleaners, paints, tools and much more.   
A recent price shopping comparison with two local national building material chains confirmed Thoro’s claims that they are more than competitive. Of further interest, Thoro System specializes in the sale of industrial grade products which many times are superior to the consumer grade sold by the chains.

Another large benefit to anyone outside our local Delaware County Pennsylvania area is the availability of our knowledge and products from a large network of dealers ​we service.

We welcome your calls and would be happy to recommend a dealer in your geographic area to locally serve you.

​​Thoro System Waterproofing Inc.-- Perfect Protection Products… for concrete and masonry.  Give us a call at 610-583-5502 before you start your next project.