Serving WA • OR • ID • MT • AK — MG products also in Canada
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MG Manufacturing

Quality Manufacturing, Born on the Roof

MG Building Supply designs and manufactures job-site problem-solvers for the commercial and residential roofing industry. Every product starts with a problem our own crews faced — leaks in the rain, mud on the site, ponding at the curb — and ends with a faster, safer, more profitable service call.

The Lineup

Three Products Every Service Truck Should Carry

Flash Dam — Instant Leak Control

A powder that forms a watertight ridge on contact with water. Control active roof leaks even on wet surfaces, even in the rain, and turn a two-truck emergency into a one-tech repair.

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Terra-Flash — Rapid Mud Solidification

Broadcast-application soil stabilizer in a 1-gallon bucket. Dries and stabilizes saturated ground 2″ deep with full stabilization in about an hour.

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Curb Slope — Ponding-Water Fix

A semi-self-leveling compound that slopes roofing curbs back to the field of the roof, eliminating the ponding locations that shorten membrane life.

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Why MG-Made

Built by Roofers, Proven in Storm Conditions

  • Field-tested by roofing contractors, facility teams, and maintenance crews in real storm conditions.
  • Designed to reduce labor: fewer trucks, fewer techs, faster service calls.
  • Distributor-friendly packaging and stocking programs.
  • Training and demos available through MG University.
Get Product

Samples, Distributors & Training

Flash Dam products are sold through roofing distributors and supported by our rep network. Visit flashdam.com for demo videos, instructions, and the distributor locator — or request samples directly.

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Want a live demo at your branch or job site?

We bring the products, the water, and the mud. You bring the crew.

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