Hy-Test Undercoating

Hy-Test Undercoating Specializing in Woolwax undercoating, rock proofing, and spray-in bed liners. Give us a call at 517-682-1510!

Open 9-5 Monday-Friday
Saturday- By Appointment Only
($50 Convenience fee Saturday only)

New BIG TEX TRAILER in for some undercoating .. if you buy a new trailer this is the best thing you could do for it befo...
03/26/2026

New BIG TEX TRAILER in for some undercoating .. if you buy a new trailer this is the best thing you could do for it before the salt gets to it !! Call for a appointment 517-682-1510

The Hy-Test family and our newest build, a 55 Chevy gasser
03/17/2026

The Hy-Test family and our newest build, a 55 Chevy gasser

New shop truck ??
03/17/2026

New shop truck ??

02/22/2026

Shop will be closed to 3rd of March. Sorry in advance, but we are getting ready for the Detroit Autorama this coming Thursday.

Getting ready for 2026 Detroit Autorama
02/12/2026

Getting ready for 2026 Detroit Autorama

Don’t wait till spring give us a call for your Woolwax undercoating appointment 517-682-1510
11/20/2025

Don’t wait till spring give us a call for your Woolwax undercoating appointment 517-682-1510

This big beautiful Chevy came in for some winter love .. Woolwax undercoating..
11/07/2025

This big beautiful Chevy came in for some winter love .. Woolwax undercoating..

New on the market . Woolwax undercoating in Gray .. all 3 flavors in stock .. call for an appointment today ..
07/16/2025

New on the market . Woolwax undercoating in Gray .. all 3 flavors in stock .. call for an appointment today ..

New product for Hy-Test Autoworks.. gladiator spray in bedliner.. if interested , give us a call for price.
04/07/2025

New product for Hy-Test Autoworks.. gladiator spray in bedliner.. if interested , give us a call for price.

Beautiful jeep came in for our Woolwax undercoating protection .. this one done in clear .. call us for a appointment 5...
03/20/2025

Beautiful jeep came in for our Woolwax undercoating protection .. this one done in clear .. call us for a appointment 5176821510

01/11/2025

Address

9998 E. US 223
Blissfield, MI
49228

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+15176821510

Website

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