Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededHUSHMATPART NUMBER: 774-617421
Floor Sound Deadening and Thermal Insulation Kit for 1961-1964 Cadillac Series 75 Fleetwood
$37644
Ships on Sep 03, 2026
Lowest Price GuaranteeFloor Sound Deadening and Thermal Insulation KitFits 1961-1964 Cadillac Series 75 Fleetwood Covers Floor (Incl. Transmission Tunnel) Butyl Rubber Compound, R-7 Rating Black/Silver Backing Sold as a Kit
Quiet the floor of a 1961-1964 Cadillac Series 75 Fleetwood with a custom-measured HushMat Ultra kit that covers floor (incl. transmission tunnel).
HushMat 617421 Floor Sound Deadening Kit Features:
- Covers Floor (Incl. Transmission Tunnel)
- Butyl Rubber Compound construction with an R-7 thermal insulation rating
- Black/Silver finish
- Withstands bakes up to 240 deg C (464 deg F) without sagging or losing adhesion
- Self-adhesive peel-and-stick application, no separate tools or adhesive required
- Sold as a complete kit
Part TypeThermal Acoustic Insulation
BrandHUSHMAT
Part CategoryPerformance Parts
R-Value7
Cold Flexibility-30 deg C without Cracking
ColorBlack Polymer / Silver Backing
QuantitySold as a Kit
MaterialButyl Rubber Compound
CoverageFloor (Incl. Transmission Tunnel)
Hardness6.5-9.0 mm (ASTM D-5)
Thickness1.5 mm
ReusableNo
Cutting RequiredYes
Temperature Resistance464 deg F (1 hr Bake, No Deformation)
FlammabilitySelf-Extinguishing per FMVSS 302
Additional Adhesive RequiredNo
Shelf Life12 Months Minimum, Stored Below 40 deg C
SafetyNot Considered a Hazardous Material
Part FitmentDirect Fit
Specific Gravity1.47 (0.47 lb per sq ft)
Package Qty1
No Questions
No Reviews
Some parts are not legal for use in California or other states with similar laws / regulations
